{"id":25341,"date":"2026-09-26T08:00:58","date_gmt":"2026-09-26T02:30:58","guid":{"rendered":"https:\/\/www.fusioncharts.com\/blog\/?p=25341"},"modified":"2026-09-27T07:48:09","modified_gmt":"2026-09-27T02:18:09","slug":"react-gantt-chart-tutorial","status":"publish","type":"post","link":"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial","title":{"rendered":"React Gantt Chart Tutorial: Build an Interactive Project Timeline"},"content":{"rendered":"<blockquote><p><b>Quick answer:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Creating an interactive React Gantt chart is simple. First, you need to install an advanced Gantt chart library like <\/span><span style=\"font-weight: 400;\">fusioncharts<\/span><span style=\"font-weight: 400;\"> and <\/span><span style=\"font-weight: 400;\">react-fusioncharts <\/span><span style=\"font-weight: 400;\">in your terminal. After installing this<\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\">register the <\/span><span style=\"font-weight: 400;\">fusioncharts\/fusioncharts. gantt<\/span><span style=\"font-weight: 400;\"> module, and create a chart with <\/span><span style=\"font-weight: 400;\">type: &#8220;gantt&#8221;<\/span><span style=\"font-weight: 400;\">. From there, you can set your date range with <\/span><span style=\"font-weight: 400;\">categories<\/span><span style=\"font-weight: 400;\">, timeline rows with <\/span><span style=\"font-weight: 400;\">processes<\/span><span style=\"font-weight: 400;\">, task bars with <\/span><span style=\"font-weight: 400;\">tasks<\/span><span style=\"font-weight: 400;\">, and dependencies with <\/span><span style=\"font-weight: 400;\">connectors<\/span><span style=\"font-weight: 400;\">. Finally, at this point, you can customize your chart by adding milestones, progress, tooltips, scrolling, and draggable task bars to meet your needs.<\/span><\/p><\/blockquote>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Introduction\" title=\"Introduction\">Introduction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#What_are_we_building\" title=\"What are we building?\">What are we building?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#How_does_a_Gantt_chart_work_in_React\" title=\"How does a Gantt chart work in React?\">How does a Gantt chart work in React?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Step_1_Create_a_React_project_with_Vite\" title=\"Step 1: Create a React project with Vite\">Step 1: Create a React project with Vite<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Step_2_Configure_Vite_for_React-FusionCharts\" title=\"Step 2: Configure Vite for React-FusionCharts\">Step 2: Configure Vite for React-FusionCharts<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#viteconfigjs\" title=\"vite.config.js\">vite.config.js<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Step_3_Import_the_FusionCharts_Gantt_module\" title=\"Step 3: Import the FusionCharts Gantt module\">Step 3: Import the FusionCharts Gantt module<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Recommended_code\" title=\"Recommended code\">Recommended code<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Step_4_Define_the_project_timeline\" title=\"Step 4: Define the project timeline\">Step 4: Define the project timeline<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Categories\" title=\"Categories\">Categories<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Step_5_Add_project_tasks_as_processes\" title=\"Step 5: Add project tasks as processes\">Step 5: Add project tasks as processes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Step_6_Plot_the_tasks_on_the_timeline\" title=\"Step 6: Plot the tasks on the timeline\">Step 6: Plot the tasks on the timeline<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Step_7_Connect_dependent_tasks\" title=\"Step 7: Connect dependent tasks\">Step 7: Connect dependent tasks<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Step_8_Add_a_project_milestone\" title=\"Step 8: Add a project milestone\">Step 8: Add a project milestone<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Step_9_Configure_the_interactive_Gantt_chart\" title=\"Step 9: Configure the interactive Gantt chart\">Step 9: Configure the interactive Gantt chart<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#How_to_make_the_React_Gantt_chart_interactive\" title=\"How to make the React Gantt chart interactive?\">How to make the React Gantt chart interactive?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Drag_and_resize_tasks\" title=\"Drag and resize tasks\">Drag and resize tasks<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Show_more_of_the_timeline_with_scrolling\" title=\"Show more of the timeline with scrolling\">Show more of the timeline with scrolling<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Add_task-specific_tooltips\" title=\"Add task-specific tooltips\">Add task-specific tooltips<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Complete_React_Gantt_chart_example\" title=\"Complete React Gantt chart example\">Complete React Gantt chart example<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#How_to_respond_when_a_task_is_moved\" title=\"How to respond when a task is moved\">How to respond when a task is moved<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Common_React_Gantt_chart_issues\" title=\"Common React Gantt chart issues\">Common React Gantt chart issues<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#ReactFCfcRoot_is_not_a_function\" title=\"ReactFC.fcRoot is not a function\">ReactFC.fcRoot is not a function<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Tasks_appear_in_the_wrong_row\" title=\"Tasks appear in the wrong row\">Tasks appear in the wrong row<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Dependency_lines_dont_appear\" title=\"Dependency lines don&#8217;t appear\">Dependency lines don&#8217;t appear<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Dates_render_incorrectly\" title=\"Dates render incorrectly\">Dates render incorrectly<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#When_should_you_use_a_React_Gantt_chart\" title=\"When should you use a React Gantt chart?\">When should you use a React Gantt chart?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#When_not_to_use_a_Gantt_chart\" title=\"When not to use a Gantt chart:\">When not to use a Gantt chart:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#Next_steps\" title=\"Next steps\">Next steps<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\/#FAQs\" title=\"FAQs\">FAQs<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Introduction\"><\/span><b>Introduction<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Project schedules are easier to follow when you can see tasks, timelines, dependencies, and milestones in one place. Building this view from scratch in React can take a lot of work. You need to handle task bars, dates, dependencies, scrolling, and user interactions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A <\/span><a href=\"https:\/\/www.fusioncharts.com\/blog\/best-gantt-chart-library\/\"><span style=\"font-weight: 400;\">Gantt chart library<\/span><\/a><span style=\"font-weight: 400;\"> can handle most of this for you. React can then take care of the rest of the application and its UI.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In this tutorial,\u00a0 you\u2019ll build a <\/span><b>React Gantt chart<\/b><span style=\"font-weight: 400;\"> using <\/span><b>FusionCharts<\/b><span style=\"font-weight: 400;\">. You\u2019ll add project tasks, set their timelines, show dependencies, and include milestones. By the end, you\u2019ll have a working Gantt chart that you can adapt for different project schedules.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">We\u2019ll use <\/span><b>FusionCharts 4.2.2<\/b><span style=\"font-weight: 400;\">, the current npm release at the time of research.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_are_we_building\"><\/span><b>What are we building?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-25342\" src=\"\/blog\/wp-content\/uploads\/2026\/09\/Interactive-react-gantt-chart-in-a-React-app.png\" alt=\"Interactive react gantt chart in a React app showing a website redesign React project timeline with dependencies and a launch milestone\" width=\"956\" height=\"335\" srcset=\"\/blog\/wp-content\/uploads\/2026\/09\/Interactive-react-gantt-chart-in-a-React-app.png 956w, \/blog\/wp-content\/uploads\/2026\/09\/Interactive-react-gantt-chart-in-a-React-app-300x105.png 300w, \/blog\/wp-content\/uploads\/2026\/09\/Interactive-react-gantt-chart-in-a-React-app-768x269.png 768w, \/blog\/wp-content\/uploads\/2026\/09\/Interactive-react-gantt-chart-in-a-React-app-450x158.png 450w, \/blog\/wp-content\/uploads\/2026\/09\/Interactive-react-gantt-chart-in-a-React-app-400x140.png 400w\" sizes=\"auto, (max-width: 956px) 100vw, 956px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">In this example, we will build a React Gantt chart for a Website Redesign project running from September to October 2026. We will break this into seven tasks on a real date axis, named: Requirements, UX Design, UI Design, Frontend Development, Backend Integration, QA Testing, and Production Launch.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Each task bar shows a completion percentage, while connector lines indicate dependencies, including that QA can&#8217;t begin until both frontend and backend work lands. Likewise, a star milestone marks the go-live date.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Hovering over a bar shows a custom tooltip with dates and progress, and you can drag task bars along the timeline.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Overall, the final chart shows a project schedule rather than a horizontal bar chart that happens to use dates.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_does_a_Gantt_chart_work_in_React\"><\/span><b>How does a Gantt chart work in React?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A Gantt chart in React is a data-driven UI component that allows you to show both time and date.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Simply put, when you need to represent interactive project or development timelines with exact start and end dates, a Gantt chart is a practical choice. Other bonuses include custom colors, drag-and-drop scheduling, annotations, and auto-zooms with various view modes.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Before we head to code, it is important to understand that a Gantt chart is not one flat array of bars; it comes in different blocks. FusionCharts Gantt primarily separates the visualization into:<\/span><\/p>\n\n<table id=\"tablepress-43\" class=\"tablepress tablepress-id-43\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Piece<\/th><th class=\"column-2\">What it defines<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">categories<\/td><td class=\"column-2\">The date\/time axis at the top of the chart<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">processes<\/td><td class=\"column-2\">The rows listed down the left side<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">tasks<\/td><td class=\"column-2\">The bars positioned on the timeline<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">connectors<\/td><td class=\"column-2\">Task dependency chart lines between tasks<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">milestones<\/td><td class=\"column-2\">Significant single dates<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-43 from cache -->\n<p><span style=\"font-weight: 400;\">Additionally, there is one more option, <\/span><span style=\"font-weight: 400;\"><code>datatable<\/code>,<\/span><span style=\"font-weight: 400;\"> in case you want extra columns of information to add beside the process names, such as owner or status.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Conceptually, one row flows like this:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block\">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;null&quot;,&quot;mime&quot;:&quot;text\/plain&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">Process: Frontend Development\r\n             \u2193\r\nTask: Sep 8 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 Sep 17\r\n             \u2193\r\nConnector \u2192 QA Testing<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">The process is the label. The task is the bar. The connector is the relationship. Keep that mapping in mind, and the rest of the configuration reads naturally.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_1_Create_a_React_project_with_Vite\"><\/span><b>Step 1: Create a React project with Vite<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Start from a fresh Vite project:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;shell&quot;,&quot;mime&quot;:&quot;text\/x-sh&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">npm create vite@latest react-gantt-chart -- --template react\r\ncd react-gantt-chart\r\nnpm install<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Then add the charting dependencies:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;shell&quot;,&quot;mime&quot;:&quot;text\/x-sh&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">npm install fusioncharts react-fusioncharts<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Here,<\/span><span style=\"font-weight: 400;\"> fusioncharts<\/span><span style=\"font-weight: 400;\"> is the core library. <\/span><a href=\"https:\/\/www.fusioncharts.com\/react-charts?framework=react\"><span style=\"font-weight: 400;\">react-fusioncharts<\/span><\/a><span style=\"font-weight: 400;\"> is the official React wrapper that turns a chart configuration into a component.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_2_Configure_Vite_for_React-FusionCharts\"><\/span><b>Step 2: Configure Vite for React-FusionCharts<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">FusionCharts ships CommonJS builds, and Vite&#8217;s dev server pre-bundles dependencies differently from a production build. If you skip this step, you&#8217;ll likely hit:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;null&quot;,&quot;mime&quot;:&quot;text\/plain&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">ReactFC.fcRoot is not a function<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">error.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"viteconfigjs\"><\/span><b>vite.config.js<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">import { defineConfig } from \"vite\";\r\nimport react from \"@vitejs\/plugin-react\";\r\nexport default defineConfig({\r\n\u00a0\u00a0plugins: [react()],\r\n\u00a0\u00a0optimizeDeps: {\r\n\u00a0\u00a0\u00a0\u00a0include: [\"react-fusioncharts\", \"fusioncharts\"],\r\n\u00a0\u00a0},\r\n});<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Then, if required:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;shell&quot;,&quot;mime&quot;:&quot;text\/x-sh&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">rm -rf node_modules\/.vite\r\nnpm run dev -- --force<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">That&#8217;s the whole fix. Set it once and move on.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_3_Import_the_FusionCharts_Gantt_module\"><\/span><b>Step 3: Import the FusionCharts Gantt module<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Now, here&#8217;s one thing to learn: this is where a Gantt tutorial diverges from a standard chart tutorial. Gantt is not part of the core chart bundle.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It lives in its own module, called:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;null&quot;,&quot;mime&quot;:&quot;text\/plain&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">fusioncharts\/fusioncharts.gantt<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">The official React examples use this module when rendering <\/span><span style=\"font-weight: 400;\">type: &#8220;gantt&#8221;<\/span><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Recommended_code\"><\/span><b>Recommended code<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">import ReactFusionCharts from \"react-fusioncharts\";\r\nimport FusionCharts from \"fusioncharts\";\r\nimport Gantt from \"fusioncharts\/fusioncharts.gantt\";\r\nimport FusionTheme from \"fusioncharts\/themes\/fusioncharts.theme.fusion\";\r\nconst ReactFC =\r\n\u00a0\u00a0ReactFusionCharts.default || ReactFusionCharts;\r\nReactFC.fcRoot(FusionCharts, Gantt, FusionTheme);<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">The <\/span><span style=\"font-weight: 400;\"><code>ReactFusionCharts.default || ReactFusionCharts<\/code><\/span><span style=\"font-weight: 400;\"> line looks redundant, but it&#8217;s mandatory. Depending on how the module is interpreted, the wrapper may arrive as a namespace object with a <\/span><span style=\"font-weight: 400;\"><code>default<\/code><\/span><span style=\"font-weight: 400;\"> property or as the component itself. Therefore, normalizing it here can save you from a whole class of interop bugs in Vite.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_4_Define_the_project_timeline\"><\/span><b>Step 4: Define the project timeline<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">As mentioned earlier,<\/span><span style=\"font-weight: 400;\"> categories<\/span><span style=\"font-weight: 400;\"> define the visible time scale. Because<\/span><a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-guide\/standard-charts\/gantt-\"><span style=\"font-weight: 400;\"> FusionCharts&#8217; Gantt chart<\/span><\/a><span style=\"font-weight: 400;\"> is date\/time-based rather than slot-based, you can mention periods with real start and end dates.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This way, you can ensure irregular calendar spans work correctly, rather than forcing every month to the same width.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Categories\"><\/span><b>Categories<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">const categories = [\r\n\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0category: [\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0start: \"09\/01\/2026\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0end: \"09\/30\/2026\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0label: \"September\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0},\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0start: \"10\/01\/2026\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0end: \"10\/15\/2026\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0label: \"October\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0},\r\n\u00a0\u00a0\u00a0\u00a0],\r\n\u00a0\u00a0},\r\n];<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">For instance, a partial month, like the October 1-15 window above, is a perfectly valid category. You can also nest multiple category levels if you want months on top and weeks underneath.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_5_Add_project_tasks_as_processes\"><\/span><b>Step 5: Add project tasks as processes<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Each process becomes one row on the left of the chart:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">const processes = {\r\n\u00a0\u00a0headerText: \"Task\",\r\n\u00a0\u00a0fontSize: \"13\",\r\n\u00a0\u00a0fontColor: \"#3F4F5F\",\r\n\r\n\u00a0\u00a0headerFontSize: \"13\",\r\n\u00a0\u00a0headerFontColor: \"#3F4F5F\",\r\n\u00a0\u00a0headerIsBold: \"1\",\r\n\r\n\u00a0\u00a0align: \"center\",\r\n\u00a0\u00a0headerAlign: \"center\",\r\n\r\n\u00a0\u00a0bgColor: \"#FFFFFF\",\r\n\u00a0\u00a0bgAlpha: \"100\",\r\n\r\n\u00a0\u00a0width: \"140\",\r\n\r\n\u00a0\u00a0process: [\r\n\u00a0\u00a0\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0id: \"task-requirements\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0label: \"Requirements\",\r\n\u00a0\u00a0\u00a0\u00a0},\r\n\u00a0\u00a0\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0id: \"task-ux\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0label: \"UX Design\",\r\n\u00a0\u00a0\u00a0\u00a0},\r\n\u00a0\u00a0\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0id: \"task-ui\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0label: \"UI Design\",\r\n\u00a0\u00a0\u00a0\u00a0},\r\n\u00a0\u00a0\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0id: \"task-frontend\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0label: \"Frontend Development\",\r\n\u00a0\u00a0\u00a0\u00a0},\r\n\u00a0\u00a0\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0id: \"task-backend\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0label: \"Backend Integration\",\r\n\u00a0\u00a0\u00a0\u00a0},\r\n\u00a0\u00a0\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0id: \"task-qa\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0label: \"QA Testing\",\r\n\u00a0\u00a0\u00a0\u00a0},\r\n\u00a0\u00a0\u00a0\u00a0{\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0id: \"task-launch\",\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0label: \"Production Launch\",\r\n\u00a0\u00a0\u00a0\u00a0},\r\n\u00a0\u00a0],\r\n};<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Here you need to pay attention to the <\/span><span style=\"font-weight: 400;\">id<\/span><span style=\"font-weight: 400;\"> values. They&#8217;re not decorative. Every task bar you create leads to a process through <\/span><span style=\"font-weight: 400;\">processId<\/span><span style=\"font-weight: 400;\">, which determines which row the bar lands in. If you later load processes from an API, keep these IDs stable and derived from your own records rather than array indexes.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_6_Plot_the_tasks_on_the_timeline\"><\/span><b>Step 6: Plot the tasks on the timeline<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-25349\" src=\"\/blog\/wp-content\/uploads\/2026\/09\/React-Gantt-chart-showing-seven-project-task-bars-with-progress-percentages.png\" alt=\"React Gantt chart showing seven project task bars with progress percentages\" width=\"913\" height=\"344\" srcset=\"\/blog\/wp-content\/uploads\/2026\/09\/React-Gantt-chart-showing-seven-project-task-bars-with-progress-percentages.png 913w, \/blog\/wp-content\/uploads\/2026\/09\/React-Gantt-chart-showing-seven-project-task-bars-with-progress-percentages-300x113.png 300w, \/blog\/wp-content\/uploads\/2026\/09\/React-Gantt-chart-showing-seven-project-task-bars-with-progress-percentages-768x289.png 768w, \/blog\/wp-content\/uploads\/2026\/09\/React-Gantt-chart-showing-seven-project-task-bars-with-progress-percentages-450x170.png 450w, \/blog\/wp-content\/uploads\/2026\/09\/React-Gantt-chart-showing-seven-project-task-bars-with-progress-percentages-400x151.png 400w\" sizes=\"auto, (max-width: 913px) 100vw, 913px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Now the bars themselves:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">const COLORS = {\r\n  teal: \"#13A88A\",\r\n  blue: \"#3478D4\",\r\n  lightSlack: \"#E9EEF3\",\r\n};\r\n\r\nconst tasks = {\r\n  slackFillColor: COLORS.lightSlack,\r\n\r\n  showHoverEffect: \"1\",\r\n\r\n  allowDrag: \"1\",\r\n\r\n  task: [\r\n    {\r\n      id: \"task-requirements\",\r\n      processId: \"task-requirements\",\r\n      start: \"09\/01\/2026\",\r\n      end: \"09\/04\/2026\",\r\n      label: \"Requirements\",\r\n      percentComplete: \"100\",\r\n\r\n      color: COLORS.teal,\r\n      borderColor: COLORS.teal,\r\n      borderAlpha: \"0\",\r\n\r\n      showLabel: \"0\",\r\n      showPercentLabel: \"0\",\r\n    },\r\n\r\n    {\r\n      id: \"task-ux\",\r\n      processId: \"task-ux\",\r\n      start: \"09\/04\/2026\",\r\n      end: \"09\/09\/2026\",\r\n      label: \"UX Design\",\r\n      percentComplete: \"100\",\r\n\r\n      color: COLORS.teal,\r\n      borderColor: COLORS.teal,\r\n      borderAlpha: \"0\",\r\n\r\n      showLabel: \"1\",\r\n      showPercentLabel: \"1\",\r\n    },\r\n\r\n    {\r\n      id: \"task-ui\",\r\n      processId: \"task-ui\",\r\n      start: \"09\/08\/2026\",\r\n      end: \"09\/14\/2026\",\r\n      label: \"UI Design\",\r\n      percentComplete: \"80\",\r\n\r\n      color: COLORS.blue,\r\n      borderColor: COLORS.blue,\r\n      borderAlpha: \"0\",\r\n\r\n      showLabel: \"1\",\r\n      showPercentLabel: \"1\",\r\n    },\r\n\r\n    {\r\n      id: \"task-frontend\",\r\n      processId: \"task-frontend\",\r\n      start: \"09\/14\/2026\",\r\n      end: \"09\/25\/2026\",\r\n      label: \"Frontend Development\",\r\n      percentComplete: \"55\",\r\n\r\n      color: COLORS.blue,\r\n      borderColor: COLORS.blue,\r\n      borderAlpha: \"0\",\r\n\r\n      showLabel: \"1\",\r\n      showPercentLabel: \"1\",\r\n    },\r\n\r\n    {\r\n      id: \"task-backend\",\r\n      processId: \"task-backend\",\r\n      start: \"09\/16\/2026\",\r\n      end: \"09\/28\/2026\",\r\n      label: \"Backend Integration\",\r\n      percentComplete: \"40\",\r\n\r\n      color: COLORS.blue,\r\n      borderColor: COLORS.blue,\r\n      borderAlpha: \"0\",\r\n\r\n      showLabel: \"1\",\r\n      showPercentLabel: \"1\",\r\n    },\r\n\r\n    {\r\n      id: \"task-qa\",\r\n      processId: \"task-qa\",\r\n      start: \"09\/28\/2026\",\r\n      end: \"10\/06\/2026\",\r\n      label: \"QA Testing\",\r\n      percentComplete: \"0\",\r\n\r\n      color: COLORS.blue,\r\n      borderColor: COLORS.blue,\r\n      borderAlpha: \"0\",\r\n\r\n      showLabel: \"1\",\r\n      showPercentLabel: \"1\",\r\n    },\r\n\r\n    {\r\n      id: \"task-launch\",\r\n      processId: \"task-launch\",\r\n      start: \"10\/07\/2026\",\r\n      end: \"10\/08\/2026\",\r\n      label: \"Production Launch\",\r\n      percentComplete: \"0\",\r\n\r\n      color: COLORS.teal,\r\n      borderColor: COLORS.teal,\r\n      borderAlpha: \"0\",\r\n\r\n      showLabel: \"0\",\r\n      showPercentLabel: \"0\",\r\n    },\r\n  ],\r\n};\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">At this point, there are three things you must understand:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">First, each task has its own <\/span><span style=\"font-weight: 400;\">id<\/span><span style=\"font-weight: 400;\">, separate from the process ID. Connectors reference task IDs, not process IDs, which is a common source of confusion.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Further,<\/span><span style=\"font-weight: 400;\"> percentComplete<\/span><span style=\"font-weight: 400;\"> accepts values from 0 to 100 and renders as a filled portion of the bar. If you use UI Design at 80 and Frontend Development at 55, it creates a realistic in-progress chart feel.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Similarly, the overlaps are intentional. UI Design starts on Sep 8 while UX Design runs to Sep 9, and Backend Integration begins two days after Frontend Development. Same way, Real schedules overlap, and a Gantt chart earns its place precisely because it makes that visible.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Finally, resist the temptation to allocate a custom color to every task at this stage. Get the chart rendering with the default theme first, then customize only where a color communicates something.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_7_Connect_dependent_tasks\"><\/span><b>Step 7: Connect dependent tasks<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Connectors turn the chart into a schedule:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">const connectors = {\r\n  connector: [\r\n    {\r\n      fromTaskId: \"task-requirements\",\r\n      toTaskId: \"task-ux\",\r\n      color: \"#9AA6B2\",\r\n      thickness: \"1\",\r\n    },\r\n\r\n    {\r\n      fromTaskId: \"task-ux\",\r\n      toTaskId: \"task-ui\",\r\n      color: \"#9AA6B2\",\r\n      thickness: \"1\",\r\n    },\r\n\r\n    {\r\n      fromTaskId: \"task-ui\",\r\n      toTaskId: \"task-frontend\",\r\n      color: \"#9AA6B2\",\r\n      thickness: \"1\",\r\n    },\r\n\r\n    {\r\n      fromTaskId: \"task-frontend\",\r\n      toTaskId: \"task-qa\",\r\n      color: \"#9AA6B2\",\r\n      thickness: \"1\",\r\n    },\r\n\r\n    {\r\n      fromTaskId: \"task-backend\",\r\n      toTaskId: \"task-qa\",\r\n      color: \"#9AA6B2\",\r\n      thickness: \"1\",\r\n    },\r\n\r\n    {\r\n      fromTaskId: \"task-qa\",\r\n      toTaskId: \"task-launch\",\r\n      color: \"#9AA6B2\",\r\n      thickness: \"1\",\r\n    },\r\n  ],\r\n};\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\"><code>fromTaskId<\/code><\/span><span style=\"font-weight: 400;\"> is the preceding task, and <\/span><span style=\"font-weight: 400;\"><code>toTaskId<\/code><\/span><span style=\"font-weight: 400;\"> is the dependent one. Notice that <\/span><span style=\"font-weight: 400;\"><code>task-qa<\/code><\/span><span style=\"font-weight: 400;\"> appears as a target twice. Both frontend and backend work must be completed before QA starts, and the chart draws both lines, so the reader can see immediately that QA sits on the critical path.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-25350\" src=\"\/blog\/wp-content\/uploads\/2026\/09\/Gantt-chart-React-example-with-connector-lines-showing-task-dependencies.png\" alt=\"Gantt chart React example with connector lines showing task dependencies\" width=\"915\" height=\"317\" srcset=\"\/blog\/wp-content\/uploads\/2026\/09\/Gantt-chart-React-example-with-connector-lines-showing-task-dependencies.png 915w, \/blog\/wp-content\/uploads\/2026\/09\/Gantt-chart-React-example-with-connector-lines-showing-task-dependencies-300x104.png 300w, \/blog\/wp-content\/uploads\/2026\/09\/Gantt-chart-React-example-with-connector-lines-showing-task-dependencies-768x266.png 768w, \/blog\/wp-content\/uploads\/2026\/09\/Gantt-chart-React-example-with-connector-lines-showing-task-dependencies-450x156.png 450w, \/blog\/wp-content\/uploads\/2026\/09\/Gantt-chart-React-example-with-connector-lines-showing-task-dependencies-400x139.png 400w\" sizes=\"auto, (max-width: 915px) 100vw, 915px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">The best part, with FusionCharts, you can also control each bar&#8217;s edges with corresponding connector attachments, so you can express finish-to-start, start-to-start, and similar relationships rather than being locked to one connector style.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_8_Add_a_project_milestone\"><\/span><b>Step 8: Add a project milestone<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-25351\" src=\"\/blog\/wp-content\/uploads\/2026\/09\/React-project-timeline-with-a-star-milestone-marking-the-go-live-date.png\" alt=\"React project timeline with a star milestone marking the go-live date\" width=\"929\" height=\"314\" srcset=\"\/blog\/wp-content\/uploads\/2026\/09\/React-project-timeline-with-a-star-milestone-marking-the-go-live-date.png 929w, \/blog\/wp-content\/uploads\/2026\/09\/React-project-timeline-with-a-star-milestone-marking-the-go-live-date-300x101.png 300w, \/blog\/wp-content\/uploads\/2026\/09\/React-project-timeline-with-a-star-milestone-marking-the-go-live-date-768x260.png 768w, \/blog\/wp-content\/uploads\/2026\/09\/React-project-timeline-with-a-star-milestone-marking-the-go-live-date-450x152.png 450w, \/blog\/wp-content\/uploads\/2026\/09\/React-project-timeline-with-a-star-milestone-marking-the-go-live-date-400x135.png 400w\" sizes=\"auto, (max-width: 929px) 100vw, 929px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Milestones mark dates rather than durations. Anchor one to the launch task:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">const milestones = {\r\n  milestone: [\r\n    {\r\n      date: \"10\/08\/2026\",\r\n      taskId: \"task-launch\",\r\n      label: \"Go Live\",\r\n      shape: \"star\",\r\n      color: \"#13A88A\",\r\n      toolText: \"Production release\",\r\n    },\r\n  ],\r\n};\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Because the milestone references <\/span><span style=\"font-weight: 400;\"><code>taskid<\/code><\/span><span style=\"font-weight: 400;\">, it renders on the correct row and stays visually tied to the work that produces it. Beyond <\/span><span style=\"font-weight: 400;\"><code>shape<\/code><\/span><span style=\"font-weight: 400;\">, you can control size, color, label position, and tooltip text, which is enough to distinguish internal checkpoints from external commitments in a busier roadmap.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Step_9_Configure_the_interactive_Gantt_chart\"><\/span><b>Step 9: Configure the interactive Gantt chart<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Here is the central configuration example:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">const chartConfigs = {\r\n  type: \"gantt\",\r\n  width: \"100%\",\r\n  height: \"520\",\r\n  dataFormat: \"json\",\r\n\r\n  dataSource: {\r\n    chart: {\r\n      caption: \"Website Redesign Project\",\r\n\r\n      subCaption: \"September\u2013October 2026\",\r\n\r\n      dateFormat: \"mm\/dd\/yyyy\",\r\n\r\n      outputDateFormat: \"dd mmm\",\r\n\r\n      theme: \"fusion\",\r\n\r\n      showTaskLabels: \"1\",\r\n\r\n      showPercentLabel: \"1\",\r\n\r\n      \/*\r\n       * Show enough of September and October\r\n       * in the final presentation.\r\n       *\/\r\n      ganttPaneDuration: \"45\",\r\n      ganttPaneDurationUnit: \"d\",\r\n\r\n      showHoverEffect: \"1\",\r\n\r\n      dateInToolTip: \"1\",\r\n\r\n      plotToolText:\r\n        \"&lt;b&gt;$processName&lt;\/b&gt;{br}Start: $start{br}End: $end{br}Progress: $percentComplete%\",\r\n\r\n      \/*\r\n       * Enable taskbar dragging.\r\n       *\/\r\n      allowDrag: \"1\",\r\n\r\n      \/*\r\n       * Update start\/end date values when\r\n       * the taskbar is moved.\r\n       *\/\r\n      autoUpdateStartEndDateColumn: \"1\",\r\n\r\n      \/*\r\n       * Allow taskbars to overlap during interaction.\r\n       *\/\r\n      allowTaskbarOverlap: \"1\",\r\n\r\n      \/*\r\n       * Task hover appearance.\r\n       *\/\r\n      taskHoverFillColor: \"#2567BE\",\r\n\r\n      taskHoverFillAlpha: \"90\",\r\n\r\n      \/*\r\n       * Typography.\r\n       *\/\r\n      baseFont: \"Arial\",\r\n\r\n      baseFontSize: \"13\",\r\n\r\n      baseFontColor: \"#3F4F5F\",\r\n\r\n      \/*\r\n       * Layout.\r\n       *\/\r\n      chartTopMargin: \"18\",\r\n\r\n      chartBottomMargin: \"10\",\r\n\r\n      \/*\r\n       * Keep chart clean.\r\n       *\/\r\n      showShadow: \"0\",\r\n    },\r\n\r\n    categories,\r\n\r\n    processes,\r\n\r\n    tasks,\r\n\r\n    connectors,\r\n\r\n    milestones,\r\n  },\r\n};\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Then:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">function App() {\r\n  return (\r\n    &lt;main&gt;\r\n      &lt;ReactFC {...chartConfigs} \/&gt;\r\n    &lt;\/main&gt;\r\n  );\r\n}\r\n\r\nexport default App;\r\n<\/pre>\n<\/div>\n<p><a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-attributes\/gantt\"><span style=\"font-weight: 400;\">FusionCharts supports tooltip<\/span><\/a><span style=\"font-weight: 400;\"> macros such as <\/span><span style=\"font-weight: 400;\"><code>$processName<\/code><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\"><code>$start<\/code><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\"><code>$end<\/code><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\"><code>$label<\/code><\/span><span style=\"font-weight: 400;\">, and <\/span><span style=\"font-weight: 400;\"><code>$percentComplete<\/code><\/span><span style=\"font-weight: 400;\"> for Gantt tasks.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Next, remember that two date settings do different jobs. <\/span><span style=\"font-weight: 400;\"><code>dateformat<\/code><\/span><span style=\"font-weight: 400;\"> shows the chart how to parse the dates you supplied. Whereas <\/span><span style=\"font-weight: 400;\"><code>outputDateFormat<\/code><\/span><span style=\"font-weight: 400;\"> controls how dates are displayed. Keeping this in mind will help you avoid the situation where a Gantt chart renders the wrong dates.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Render it as a component:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">function App() {\r\n  return (\r\n    &lt;main&gt;\r\n      &lt;ReactFC {...chartConfigs} \/&gt;\r\n    &lt;\/main&gt;\r\n  );\r\n}\r\n\r\nexport default App;\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">FusionCharts supports tooltip macros including <\/span><span style=\"font-weight: 400;\"><code>$processName<\/code><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\"><code>$start<\/code><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\"><code>$end<\/code><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\"><code>$label<\/code><\/span><span style=\"font-weight: 400;\">, and <\/span><span style=\"font-weight: 400;\"><code>$percentComplete<\/code><\/span><span style=\"font-weight: 400;\">, which keep the tooltip in sync with the data without extra wiring.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_make_the_React_Gantt_chart_interactive\"><\/span><b>How to make the React Gantt chart interactive?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Static schedules go stale. These three settings are what make the chart feel like a tool.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Drag_and_resize_tasks\"><\/span><b>Drag and resize tasks<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">allowDrag: \"1\"<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Draggable Gantt taskbars arrived in FusionCharts v3.23, and later releases improved connector behavior mid-drag and added resizing from the bar edges, so users can extend a task&#8217;s duration as well as move it.<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">autoUpdateStartEndDateColumn: \"1\"<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Introduced in FusionCharts 4.0, this keeps any start\/end date columns in sync as a bar moves, so the numbers beside the chart don&#8217;t contradict the picture.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">One thing to be clear about in a production app: dragging changes the visualization in the browser and nothing else. To make a schedule change stick, listen for the drag event and persist the new dates to your React state and your backend. That&#8217;s covered in the next section.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-25353\" src=\"\/blog\/wp-content\/uploads\/2026\/09\/Taskbar-being-dragged-and-resized.gif\" alt=\"Dragging a taskbar in an interactive Gantt chart built with React\" width=\"1024\" height=\"576\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Show_more_of_the_timeline_with_scrolling\"><\/span><b>Show more of the timeline with scrolling<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Use:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">ganttPaneDuration: \"21\",\r\nganttPaneDurationUnit: \"d\",\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Together, these show a 21-day window at a time. The project runs longer than that, so the remaining range stays reachable through the Gantt pane&#8217;s horizontal scrolling instead of being crushed into an unreadable width. Adjust the number to match how much detail your users need at once; shorter windows suit day-level planning, longer ones suit quarterly roadmaps.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Add_task-specific_tooltips\"><\/span><b>Add task-specific tooltips<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">plotToolText:\r\n  \"&lt;b&gt;$processName&lt;\/b&gt;{br}Start: $start{br}End: $end{br}Progress: $percentComplete%\"\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">This is the cheapest interaction win in the tutorial. It gives every bar a useful hover state with no component state, no event handlers, and no extra rendering logic.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Complete_React_Gantt_chart_example\"><\/span><b>Complete React Gantt chart example<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Here&#8217;s the whole thing as a single <\/span><span style=\"font-weight: 400;\"><code>src\/App.jsx<\/code><\/span><span style=\"font-weight: 400;\">:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Recommended complete example:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;jsx&quot;,&quot;mime&quot;:&quot;text\/jsx&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">import ReactFusionCharts from \"react-fusioncharts\";\r\nimport FusionCharts from \"fusioncharts\";\r\nimport Gantt from \"fusioncharts\/fusioncharts.gantt\";\r\nimport FusionTheme from \"fusioncharts\/themes\/fusioncharts.theme.fusion\";\r\n\r\nconst ReactFC =\r\n  ReactFusionCharts.default || ReactFusionCharts;\r\n\r\nReactFC.fcRoot(FusionCharts, Gantt, FusionTheme);\r\n\r\nconst categories = [\r\n  {\r\n    category: [\r\n      {\r\n        start: \"09\/01\/2026\",\r\n        end: \"09\/30\/2026\",\r\n        label: \"September\",\r\n      },\r\n      {\r\n        start: \"10\/01\/2026\",\r\n        end: \"10\/15\/2026\",\r\n        label: \"October\",\r\n      },\r\n    ],\r\n  },\r\n];\r\n\r\nconst processes = {\r\n  headerText: \"Task\",\r\n  process: [\r\n    { id: \"requirements\", label: \"Requirements\" },\r\n    { id: \"ux\", label: \"UX Design\" },\r\n    { id: \"ui\", label: \"UI Design\" },\r\n    { id: \"frontend\", label: \"Frontend Development\" },\r\n    { id: \"backend\", label: \"Backend Integration\" },\r\n    { id: \"qa\", label: \"QA Testing\" },\r\n    { id: \"launch\", label: \"Production Launch\" },\r\n  ],\r\n};\r\n\r\nconst tasks = {\r\n  task: [\r\n    {\r\n      id: \"task-requirements\",\r\n      processId: \"requirements\",\r\n      start: \"09\/01\/2026\",\r\n      end: \"09\/04\/2026\",\r\n      label: \"Requirements\",\r\n      percentComplete: \"100\",\r\n    },\r\n    {\r\n      id: \"task-ux\",\r\n      processId: \"ux\",\r\n      start: \"09\/04\/2026\",\r\n      end: \"09\/09\/2026\",\r\n      label: \"UX Design\",\r\n      percentComplete: \"100\",\r\n    },\r\n    {\r\n      id: \"task-ui\",\r\n      processId: \"ui\",\r\n      start: \"09\/08\/2026\",\r\n      end: \"09\/14\/2026\",\r\n      label: \"UI Design\",\r\n      percentComplete: \"80\",\r\n    },\r\n    {\r\n      id: \"task-frontend\",\r\n      processId: \"frontend\",\r\n      start: \"09\/14\/2026\",\r\n      end: \"09\/25\/2026\",\r\n      label: \"Frontend Development\",\r\n      percentComplete: \"55\",\r\n    },\r\n    {\r\n      id: \"task-backend\",\r\n      processId: \"backend\",\r\n      start: \"09\/16\/2026\",\r\n      end: \"09\/28\/2026\",\r\n      label: \"Backend Integration\",\r\n      percentComplete: \"40\",\r\n    },\r\n    {\r\n      id: \"task-qa\",\r\n      processId: \"qa\",\r\n      start: \"09\/28\/2026\",\r\n      end: \"10\/06\/2026\",\r\n      label: \"QA Testing\",\r\n      percentComplete: \"0\",\r\n    },\r\n    {\r\n      id: \"task-launch\",\r\n      processId: \"launch\",\r\n      start: \"10\/07\/2026\",\r\n      end: \"10\/08\/2026\",\r\n      label: \"Production Launch\",\r\n      percentComplete: \"0\",\r\n    },\r\n  ],\r\n};\r\n\r\nconst connectors = [\r\n  {\r\n    connector: [\r\n      {\r\n        fromTaskId: \"task-requirements\",\r\n        toTaskId: \"task-ux\",\r\n      },\r\n      {\r\n        fromTaskId: \"task-ux\",\r\n        toTaskId: \"task-ui\",\r\n      },\r\n      {\r\n        fromTaskId: \"task-ui\",\r\n        toTaskId: \"task-frontend\",\r\n      },\r\n      {\r\n        fromTaskId: \"task-frontend\",\r\n        toTaskId: \"task-qa\",\r\n      },\r\n      {\r\n        fromTaskId: \"task-backend\",\r\n        toTaskId: \"task-qa\",\r\n      },\r\n      {\r\n        fromTaskId: \"task-qa\",\r\n        toTaskId: \"task-launch\",\r\n      },\r\n    ],\r\n  },\r\n];\r\n\r\nconst milestones = {\r\n  milestone: [\r\n    {\r\n      date: \"10\/08\/2026\",\r\n      taskid: \"task-launch\",\r\n      label: \"Go Live\",\r\n      shape: \"star\",\r\n      tooltext: \"Production release\",\r\n    },\r\n  ],\r\n};\r\n\r\nconst chartConfigs = {\r\n  type: \"gantt\",\r\n  width: \"100%\",\r\n  height: \"520\",\r\n  dataFormat: \"json\",\r\n  dataSource: {\r\n    chart: {\r\n      caption: \"Website Redesign Project\",\r\n      subcaption: \"September\u2013October 2026\",\r\n      dateformat: \"mm\/dd\/yyyy\",\r\n      outputdateformat: \"dd mmm\",\r\n      theme: \"fusion\",\r\n\r\n      showTaskLabels: \"1\",\r\n      showPercentLabel: \"1\",\r\n\r\n      ganttPaneDuration: \"21\",\r\n      ganttPaneDurationUnit: \"d\",\r\n\r\n      showHoverEffect: \"1\",\r\n      dateInToolTip: \"1\",\r\n      plotToolText:\r\n        \"&lt;b&gt;$processName&lt;\/b&gt;{br}Start: $start{br}End: $end{br}Progress: $percentComplete%\",\r\n\r\n      allowDrag: \"1\",\r\n      autoUpdateStartEndDateColumn: \"1\",\r\n    },\r\n\r\n    categories,\r\n    processes,\r\n    tasks,\r\n    connectors,\r\n    milestones,\r\n  },\r\n};\r\n\r\nfunction App() {\r\n  return (\r\n    &lt;main style={{ padding: \"24px\" }}&gt;\r\n      &lt;ReactFC {...chartConfigs} \/&gt;\r\n    &lt;\/main&gt;\r\n  );\r\n}\r\n\r\nexport default App;\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Run <\/span><span style=\"font-weight: 400;\"><code>npm run dev<\/code><\/span><span style=\"font-weight: 400;\"> and you have a scrollable, draggable project timeline with dependencies, progress, and a milestone.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_respond_when_a_task_is_moved\"><\/span><b>How to respond when a task is moved<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Dragging is only half the feature. FusionCharts exposes events for user interaction, including process, category, connector, and task-level events, and <\/span><span style=\"font-weight: 400;\"><code>dataplotdragmove<\/code><\/span><span style=\"font-weight: 400;\"> fires as a Gantt taskbar is dragged.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Wire it up modestly to start:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For example:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">const chartEvents = {\r\n  dataplotdragmove: (eventObj, dataObj) =&gt; {\r\n    console.log(\"Task moved:\", dataObj);\r\n  },\r\n};\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">Then pass it to the component:<\/span><\/p>\n<div class=\"wp-block-codemirror-blocks code-block \">\n<pre class=\"CodeMirror\" data-setting=\"{&quot;mode&quot;:&quot;htmlmixed&quot;,&quot;mime&quot;:&quot;text\/html&quot;,&quot;theme&quot;:&quot;material&quot;,&quot;lineNumbers&quot;:false,&quot;lineWrapping&quot;:true,&quot;styleActiveLine&quot;:false,&quot;readOnly&quot;:true,&quot;align&quot;:&quot;&quot;}\">&lt;ReactFC\r\n  {...chartConfigs}\r\n  events={chartEvents}\r\n\/&gt;\r\n<\/pre>\n<\/div>\n<p><span style=\"font-weight: 400;\">From there, the production pattern is straightforward: read the new start and end dates off the event payload, update the task in React state (or your query cache), and fire a request to persist the change. Because the chart re-renders from <\/span><span style=\"font-weight: 400;\"><code>dataSource<\/code><\/span><span style=\"font-weight: 400;\">, keeping state as the source of truth lets you handle optimistic updates and failed saves cleanly.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Common_React_Gantt_chart_issues\"><\/span><b>Common React Gantt chart issues<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Most React Gantt chart issues come from configuration mismatches rather than the chart itself. The following checks cover some of the most common problems you may run into when setting up FusionCharts with React and Vite.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"ReactFCfcRoot_is_not_a_function\"><\/span><b>ReactFC.fcRoot is not a function<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">This is the Vite CommonJS\/ESM interop problem from Step 2. Add <\/span><span style=\"font-weight: 400;\"><code>react-fusioncharts<\/code><\/span><span style=\"font-weight: 400;\"> and <\/span><span style=\"font-weight: 400;\"><code>fusioncharts<\/code><\/span><span style=\"font-weight: 400;\"> to <\/span><span style=\"font-weight: 400;\"><code>optimizeDeps.include<\/code><\/span><span style=\"font-weight: 400;\">, use the <\/span><span style=\"font-weight: 400;\"><code>ReactFusionCharts.default || ReactFusionCharts<\/code><\/span><span style=\"font-weight: 400;\"> normalization, and clear <\/span><span style=\"font-weight: 400;\"><code>node_modules\/. vite<\/code><\/span><span style=\"font-weight: 400;\"> if the error survives a restart.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tasks_appear_in_the_wrong_row\"><\/span><b>Tasks appear in the wrong row<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Check that every <\/span><span style=\"font-weight: 400;\"><code>task.processId<\/code><\/span><span style=\"font-weight: 400;\"> exactly matches a <\/span><span style=\"font-weight: 400;\"><code>process.id<\/code><\/span><span style=\"font-weight: 400;\">. A typo won&#8217;t throw; the bar will just land somewhere you didn&#8217;t expect or not render at all.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dependency_lines_dont_appear\"><\/span><b>Dependency lines don&#8217;t appear<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Connectors reference <\/span><b>task<\/b><span style=\"font-weight: 400;\"> IDs, not process IDs. Confirm that both <\/span><span style=\"font-weight: 400;\"><code>fromTaskId<\/code><\/span><span style=\"font-weight: 400;\"> and <\/span><span style=\"font-weight: 400;\"><code>toTaskId<\/code><\/span><span style=\"font-weight: 400;\"> match values in your <\/span><span style=\"font-weight: 400;\"><code>tasks<\/code><\/span><span style=\"font-weight: 400;\"> array.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dates_render_incorrectly\"><\/span><b>Dates render incorrectly<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Your incoming dates must match the configured <\/span><span style=\"font-weight: 400;\"><code>dateformat<\/code><\/span><span style=\"font-weight: 400;\">. Mixing ISO dates from an API (<\/span><span style=\"font-weight: 400;\"><code>2026-09-01<\/code><\/span><span style=\"font-weight: 400;\">) with a chart configured for <\/span><span style=\"font-weight: 400;\"><code>mm\/dd\/yyyy<\/code><\/span><span style=\"font-weight: 400;\"> is the usual culprit. Either normalize the dates before passing them in, or set <\/span><span style=\"font-weight: 400;\"><code>dateformat<\/code><\/span><span style=\"font-weight: 400;\"> to match your source.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"When_should_you_use_a_React_Gantt_chart\"><\/span><b>When should you use a React Gantt chart?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A Gantt chart earns its complexity when work has duration and sequence.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Good fits:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Product roadmaps<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Project schedules<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Release planning<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Construction schedules<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Campaign planning<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Implementation projects<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Workflow dependencies<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Gantt charts shine when tasks have durations, overlap, and dependencies \u2014 you need to see not just <\/span><i><span style=\"font-weight: 400;\">what<\/span><\/i><span style=\"font-weight: 400;\"> happens, but <\/span><i><span style=\"font-weight: 400;\">when it starts, how long it runs, and what it&#8217;s waiting on<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"When_not_to_use_a_Gantt_chart\"><\/span><b>When not to use a Gantt chart:<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">For simple chronological events without task duration or dependencies, a regular timeline is usually easier to read and build. If you&#8217;re just listing milestones or dates in sequence,\u00a0 a launch history, a company&#8217;s key events &#8211; a Gantt chart adds unnecessary complexity. Save it for planning work with real scheduling logic, not for storytelling a sequence of events.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Next_steps\"><\/span><b>Next steps<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">You now have a working timeline. Some natural extensions:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Load task data from an API instead of hard-coded constants<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Persist dragged dates to your backend through <\/span><span style=\"font-weight: 400;\"><code>dataplotdragmove<\/code><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Add extra process columns with a <\/span><span style=\"font-weight: 400;\"><code>datatable<\/code><\/span><span style=\"font-weight: 400;\"> for owner, status, or effort<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Show planned versus actual schedules as parallel bars<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Mark deadlines and freeze windows with trend lines and zones<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Respond to clicks on processes, tasks, and connectors through chart events<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Break the project into additional phases as the schedule grows<\/span><\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.fusioncharts.com\/dev\/getting-started\/java\/your-first-chart-using-java\"><span style=\"font-weight: 400;\">FusionCharts&#8217; Gantt chart<\/span><\/a><span style=\"font-weight: 400;\"> supports all of these, along with customizable task interactions and detailed tooltip control. If you&#8217;re building scheduling or project-management features into a React application, the React Gantt chart you built here is a solid starting point.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Explore the full <\/span><a href=\"https:\/\/www.fusioncharts.com\/blog\/javascript-gantt-chart-project-management-dashboard\/\"><span style=\"font-weight: 400;\">Gantt documentation<\/span><\/a><span style=\"font-weight: 400;\">, or <\/span><a href=\"https:\/\/resources.fusioncharts.com\/download-free-trial\/\"><span style=\"font-weight: 400;\">start a free trial<\/span><\/a><span style=\"font-weight: 400;\"> to build it into your own product.\u00a0<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span><b>FAQs<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><b>What is a React Gantt chart?<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">In simple terms, a react grant chart is a date\/time-based chart. It helps you to represent tasks with their exact start and end dates. Other than this, with Gantt charts, you can also show project dependencies, progress, milestones, and other scheduling information.<\/span><\/p>\n<p><b>How do I create a Gantt chart in React?<\/b><b><br \/>\n<\/b><b>To create a Gantt chart in React, first install <\/b><span style=\"font-weight: 400;\">a Gantt-capable charting library, like FusionCharts. After that, you need to plot tasks and their respective dates\/data points and render the timeline using a React component.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here is how you can do this with FusionCharts: use <\/span><span style=\"font-weight: 400;\">react-fusioncharts<\/span><span style=\"font-weight: 400;\">, register <\/span><span style=\"font-weight: 400;\">fusioncharts\/fusioncharts.gantt<\/span><span style=\"font-weight: 400;\">, and set the chart type to <\/span><span style=\"font-weight: 400;\">gantt<\/span><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><b>Can a React Gantt chart show task dependencies?<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">Yes. FusionCharts Gantt charts support connectors between tasks using task IDs. This provides clear visual relationships between tasks, such as one task beginning after another finishes.<\/span><\/p>\n<p><b>Can users drag tasks in a FusionCharts Gantt chart?<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">Yes. With FusionCharts, you can easily drag Gantt taskbars. To do this, use the <\/span><span style=\"font-weight: 400;\">allowDrag<\/span><span style=\"font-weight: 400;\"> capability. With recent updates, you can also adjust connector behavior, such as dragging and resizing from taskbar edges.<\/span><\/p>\n<p><b>Can I show project progress in a React Gantt chart?<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">Yes. FusionCharts tasks support the <\/span><span style=\"font-weight: 400;\">percentComplete<\/span><span style=\"font-weight: 400;\"> property, which accepts values from 0 to 100 and can be used to visualize task completion.<\/span><\/p>\n<p><a href=\"https:\/\/resources.fusioncharts.com\/download-free-trial\/\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-25014\" src=\"\/blog\/wp-content\/uploads\/2022\/04\/FusionCharts-CTA-banner-Free-Trial-Download.webp\" alt=\"FusionCharts CTA banner - Free Trial Download\" width=\"1662\" height=\"908\" srcset=\"\/blog\/wp-content\/uploads\/2022\/04\/FusionCharts-CTA-banner-Free-Trial-Download.webp 1662w, \/blog\/wp-content\/uploads\/2022\/04\/FusionCharts-CTA-banner-Free-Trial-Download-300x164.webp 300w, \/blog\/wp-content\/uploads\/2022\/04\/FusionCharts-CTA-banner-Free-Trial-Download-1024x559.webp 1024w, \/blog\/wp-content\/uploads\/2022\/04\/FusionCharts-CTA-banner-Free-Trial-Download-768x420.webp 768w, \/blog\/wp-content\/uploads\/2022\/04\/FusionCharts-CTA-banner-Free-Trial-Download-1536x839.webp 1536w, \/blog\/wp-content\/uploads\/2022\/04\/FusionCharts-CTA-banner-Free-Trial-Download-450x246.webp 450w, \/blog\/wp-content\/uploads\/2022\/04\/FusionCharts-CTA-banner-Free-Trial-Download-400x219.webp 400w\" sizes=\"auto, (max-width: 1662px) 100vw, 1662px\" \/><\/a><\/p>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is a React Gantt chart?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"In simple terms, a React Gantt chart is a date\/time-based chart. It helps you represent tasks with their exact start and end dates. You can also use Gantt charts to show project dependencies, progress, milestones, and other scheduling information.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I create a Gantt chart in React?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"To create a Gantt chart in React, first install a Gantt-capable charting library, such as FusionCharts. Then, plot tasks and their respective dates or data points and render the timeline using a React component. With FusionCharts, use react-fusioncharts, register fusioncharts\/fusioncharts.gantt, and set the chart type to gantt.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can a React Gantt chart show task dependencies?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. FusionCharts Gantt charts support connectors between tasks using task IDs. This provides clear visual relationships between tasks, such as one task beginning after another finishes.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can users drag tasks in a FusionCharts Gantt chart?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. With FusionCharts, you can drag Gantt taskbars using the allowDrag capability. Recent updates also support improved connector behavior and resizing from taskbar edges.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I show project progress in a React Gantt chart?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. FusionCharts tasks support the percentComplete property, which accepts values from 0 to 100 and can be used to visualize task completion.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quick answer: Creating an interactive React Gantt chart is simple. First, you need to install an advanced Gantt chart library like fusioncharts and react-fusioncharts in your terminal. After installing this, register the fusioncharts\/fusioncharts. gantt module, and create a chart with type: &#8220;gantt&#8221;. From there, you can set your date range with categories, timeline rows with [&hellip;]<\/p>\n","protected":false},"author":86,"featured_media":25355,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17,722,1082],"tags":[105,163,573,1430,757],"coauthors":[1156],"class_list":["post-25341","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-charting-guidelines","category-fusioncharts","category-react","tag-data-visualization","tag-gantt-chart","tag-javascript-charts","tag-project-management","tag-react"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>React Gantt Chart Tutorial: Build an Interactive Timeline<\/title>\n<meta name=\"description\" content=\"Build a React Gantt chart with FusionCharts and learn how to add tasks, dependencies, milestones, progress, tooltips, scrolling, and draggable taskbars.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"React Gantt Chart Tutorial: Build an Interactive Timeline\" \/>\n<meta property=\"og:description\" content=\"Build a React Gantt chart with FusionCharts and learn how to add tasks, dependencies, milestones, progress, tooltips, scrolling, and draggable taskbars.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fusioncharts.com\/blog\/react-gantt-chart-tutorial\" \/>\n<meta property=\"og:site_name\" content=\"FusionBrew - The FusionCharts Blog\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-26T02:30:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-27T02:18:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2026\/09\/React-Gantt-Chart-Tutorial-Build-an-Interactive-Project-Timelines-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1463\" \/>\n\t<meta property=\"og:image:height\" content=\"823\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Shamal Jayawardhana\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Shamal Jayawardhana\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"16 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\n\t    \"@context\": \"https:\/\/schema.org\",\n\t    \"@graph\": [\n\t        {\n\t            \"@type\": \"Article\",\n\t            \"@id\": 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