40:null 41:["$","title",null,{"children":"Build a simple interactive Gantt chart | Timur Khojayev | Observable"}] 47:T77f,gb_ump = (Plot.plot({ marks: [ Plot.frame({ stroke: settings.panelBorder == "show" ? "#ccc" : null }), Plot.barX(filteredGB, { y: "full_name", x1: (d) => parser(d.date_start), x2: (d) => parser(d.date_end), fill: "sex", rx: settings.barRoundness, insetTop: settings.barHeight, insetBottom: settings.barHeight }), Plot.text(filteredGB, { y: "full_name", x: (d) => parser(d.date_start), text: (d) => d.full_name, textAnchor: "start", dy: settings.textPosition, fontSize: settings.fontSize, stroke: null, fill: "black", fontWeight: 400 }), Plot.tip(filteredGB, Plot.pointerY({ y: "full_name", x1: (d) => parser(d.date_start), x2: (d) => parser(d.date_end), title: (d) => { return `Name: ${d.full_name}\n` + `Country: ${d.country}\n\n` + `Umpire ID: ${d.id}\n` + `Gender: ${d.sex}\n\n` + `From: ${formatMonthYear(parser(d.date_start))}` + (d.date_end < maxDateEnd ? `\nTo: ${d.date_end}` : `\nongoing`) + `\n\nTotal duration: ${d.dur_total} days`; } })) ], height: plotHeight, width: settings.plotWidth, x: { grid: (settings.gridlines == "x") | (settings.gridlines == "both") ? true : null }, y: { domain: domainFiltered, label: null, tickFormat: null, tickSize: null, grid: (settings.gridlines == "y") | (settings.gridlines == "both") ? true : null }, color: { domain: (genders.length === 0) ? ["M", "F"] : genders, range: (genders.length === 0) ? ["#56B4e9", "pink"] : colors, legend: false } }) )48:[{"id":"9ac3cae84db0504d204f09a294b8385e631d38bb6e63947110d97cd384d70eb1e333bfcbcca94117a893ed8c7e6ada6be6584ed2da25712c99d86a70352f9753","href":"https://static.observableusercontent.com/files/9ac3cae84db0504d204f09a294b8385e631d38bb6e63947110d97cd384d70eb1e333bfcbcca94117a893ed8c7e6ada6be6584ed2da25712c99d86a70352f9753","name":"gb_df.json","type":"application/json","lastModified":1792003730343,"size":13055}] 45:{"id":"52e3d0c639aa098e","slug":null,"title":"Build a simple interactive Gantt chart","thumbnail":"c2e3b9b556c7f7df0219dda0dbed3c5effea3d826c34a7311603fdef1e58d065","access_level":"public","create_time":"$D2026-02-21T18:39:01.270Z","update_time":"$D2026-10-14T18:59:27.407Z","view_time":null,"first_public_time":"$D2026-03-03T07:38:52.264Z","has_unpublished_edits":null,"fork":{"id":"491ed062589463cb","slug":"build-your-own-gantt-chart","title":"Build a simple interactive Gantt chart","owner":{"id":"f35c755083683fe5","login":"observablehq","name":"Observable"}},"stars":0,"starred":false,"owner":{"type":"team","id":"cd0e96a7870ecc10","login":"infographicskz","name":"Timur Khojayev","avatar_url":"https://avatars-next.observableusercontent.com/2efed784165680985aff8e645b36a65109a973933e52bd42be88462fa054326e","tier":"starter_2024","bio":"","following":false},"version":2366,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"59790a89e731d462","login":"infographicskz","name":"Timur Khojayev","avatar_url":"https://avatars-next.observableusercontent.com/2efed784165680985aff8e645b36a65109a973933e52bd42be88462fa054326e","tier":null,"bio":"","following":false}],"members":[{"type":"individual","id":"59790a89e731d462","login":"infographicskz","name":"Timur Khojayev","avatar_url":"https://avatars-next.observableusercontent.com/2efed784165680985aff8e645b36a65109a973933e52bd42be88462fa054326e","tier":null,"role":"editor"},{"type":"team","id":"cd0e96a7870ecc10","login":"infographicskz","name":"Timur Khojayev","avatar_url":"https://avatars-next.observableusercontent.com/2efed784165680985aff8e645b36a65109a973933e52bd42be88462fa054326e","tier":"starter_2024","role":"viewer"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":1,"collection":null,"type":"notebook","body":{"titling":"auto","title":"Build a simple interactive Gantt chart","cells":[{"id":0,"value":"# Build a simple interactive Gantt chart","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":218,"value":"Gantt charts provide a clear visual overview of project timelines. Use this template notebook to quickly create and share custom Gantt charts for your own projects using [Observable Plot](https://observablehq.com/@observablehq/plot). ","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1902,"value":"Below is an example chart created in [a fork](https://observablehq.com/@allisonhorst/lotr-gantt-sam-frodo) of this notebook, showing Frodo and Sam's journey and companions from the Shire to Mount Doom in The Lord of the Rings (data: [tolkiengateway.net](https://scifi.stackexchange.com/questions/7304/what-is-the-timeline-for-the-lord-of-the-rings-trilogy)). ","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1601,"value":"---\n## Step 1. How to update this notebook\n\n[Fork](https://observablehq.com/@observablehq/fork-suggest-merge) this notebook to make a copy in your account so that your changes are saved. \n\nIf you don’t have an Observable account, you can still create and download your waffle chart by working in [tinker mode](https://observablehq.com/@observablehq/tinker-mode) to make temporary edits.\n","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":378,"value":"---\n## Step 2. Create your project timeline\n\nThe placeholder _tasks_ array below contains mock tasks with a group, start and end dates, color, and a description. Update the array below with your own data. Make sure to keep the property names the same — you should only update things in quotes. Add more objects as needed for additional tasks.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":5,"value":"gb_df = FileAttachment(\"gb_df.json\").json()","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2270,"value":"gb_df","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":381,"value":"---\n## Step 3. Make your custom color scheme","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1039,"value":"Update your color scheme by changing values in the array below. From your groups defined in _tasks_ above, these are the groups you need to include in your color palette (make sure the text you enter for _group_ below matches those exactly, otherwise the color mapping won’t work): ${Array.from(new Set(gb_df.map(d => d.sex))).join(\" — \")}","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1309,"value":"myColors = [{sex: \"F\", color: \"pink\"},\n {sex: \"M\", color: \"#56B4e9\"}]","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1467,"value":"Palette preview: ","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1034,"value":"{\n const div = d3.create('div')\n .style('display', 'flex')\n div.selectAll('div')\n .data(myColors.map(d => d.color))\n .join('div')\n .style('width', 'auto')\n .style('padding', '10px')\n .style('margin', '2px')\n .style('border-radius', '2px')\n .style('background-color', d => d)\n .text(d => d).node()\n div.selectAll('div')\n .data(myColors.map(d => d.sex))\n .style('color', \"black\")\n .style('stroke-width', '2px') // ?\n .style('stroke', \"#fff\") // ?\n .text(d => d).node()\n return div.node()\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1473,"value":"---\n## Step 4. Create your custom Gantt chart\nThe data and color palette you created above are automatically pulled into the Gantt chart below. Further customize your chart using the inputs below, or by editing the Observable Plot code directly below the chart!","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1755,"value":"viewof settings = (\n Inputs.form(\n {\n plotHeight: Inputs.range([30 * gb_df.length, 100 * gb_df.length], {label: \"Plot height\", step: 1, value: 3186}),\n plotWidth: Inputs.range([100, 1200], {label: \"Plot width\", step: 1, value: 1200}),\n barHeight: Inputs.range([0, 20], {label: \"Adjust bar height\", step: 1, value: 17}),\n textPosition: Inputs.range([-50, 50], {label: \"Label dodge\", step: 1, value: -21}),\n fontSize: Inputs.range([8, 24], {label: \"Font size\", step: 1, value: 14}),\n barRoundness: Inputs.range([0, 20], {label: \"Bar roundness\", step: 1, value: 3}),\n gridlines: Inputs.radio([\"x\", \"y\", \"both\", \"none\"], {label: \"Gridlines\", value: \"x\"}),\n panelBorder: Inputs.radio([\"show\", \"hide\"], {label: \"Panel border\", value: \"hide\"})\n },\n {template}\n )\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2327,"value":"viewof active_gb = Inputs.radio([\"Active\", \"Expired\", \"All\"], {label: \"Select GBs by status\", value: \"All\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2338,"value":"statusGB = (active_gb === \"All\") ? gb_df : ((active_gb === \"Active\") ? gb_df.filter(d => d.date_end >= maxDateEnd) : gb_df.filter(d => d.date_end < maxDateEnd))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2077,"value":"viewof genders = Inputs.checkbox(domainByGroup, {label: \"Select gender\", value: domainByGroup})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2105,"value":"filteredGB = (genders.length === 0) ? statusGB.filter(d => [\"M\", \"F\"].includes(d.sex)) : statusGB.filter(d => genders.includes(d.sex))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2128,"value":"viewof sortByVar = Inputs.radio([\"date_start\", \"year_iu\", \"dur_total\"], {label: \"Select sorting variable\", value: \"date_start\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2153,"value":"sortedGB = filteredGB.sort((a, b) => d3.ascending(a[sortByVar], b[sortByVar]) || d3.ascending(a.weight_gb, b.weight_gb))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2107,"value":"domainFiltered = [...new Set(sortedGB.map(d => d.full_name))]","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2109,"value":"plotHeight = filteredGB.length * 54","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":8,"value":"$47","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1612,"value":"---\n## Step 5. Download or embed it\nOnce you’re done customizing your Gantt chart, click on the three dot menu (${getIcon('threeVertDots')}) in the left margin to download it as an SVG or PNG. If you’re working in a fork, you can also [embed your chart](https://observablehq.com/@observablehq/embeds) elsewhere by choosing the Embed option in the same menu.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1697,"value":"### _Looking for something different?_\nSearch for “Gantt chart” in Observable to see hundreds of Gantt chart examples shared by the Observable community! ","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1488,"value":"

\n## How we prep the data:","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1513,"value":"Sort the data by task start date: ","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1079,"value":"domainByDate = gb_df.sort((a, b) => d3.ascending(a.year_iu, b.year_iu) || d3.ascending(a.weight_gb, b.weight_gb)).map(d => d.full_name)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1515,"value":"Get unique groups, in order based on the earliest task start date for that group:","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1114,"value":"domainByGroup = d3.groups(gb_df, d => d.sex).map(d => d[0])","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1517,"value":"Parse dates (YYYY-MM-DD format):","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":67,"value":"parser = d3.utcParse(\"%Y-%m-%d\")","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2062,"value":"formatMonthYear = d3.timeFormat(\"%B %Y\")","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2025,"value":"maxDateEnd = d3.max(gb_df, d => d.date_end);","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1520,"value":"Map colors to groups:","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1321,"value":"colorMap = new Map(myColors.map((obj) => [obj.sex, obj.color]))","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1425,"value":"colors = genders.map(d => colorMap.get(d))","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1625,"value":"Import function for icons:","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1614,"value":"import {getIcon} from '@observablehq/product-education-icon-helpers'","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1749,"value":"Widgets layout template (adapted from from Martien van Steenbergen's [Horizontal inputs](https://observablehq.com/@martien/horizontal-inputs) notebook):\n","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":1748,"value":"// Template credit: This layout is updated from Martien van Steenbergen @martien/horizontal-inputs\n\ntemplate = (inputs) => \nhtl.html`

${Object.values(inputs)}

\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W48","stdlib":"1"}} 46:"$45:body"