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August 21, 2019 08:53
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SVG Donut Chart
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| license: mit |
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| var startOffset = 25; | |
| var strokeDashOffset; | |
| var firstOffset; | |
| var previousValues = []; | |
| var svg = d3.select('svg') | |
| function drawDonutChart(){ | |
| var data = initData() | |
| svg.append('circle') | |
| .attr('class', 'donut-hole') | |
| .attr('cx', 21) | |
| .attr('cy', 21) | |
| .attr('r', 15.91549430918954) | |
| .attr('fill', '#fff') | |
| svg.append('circle') | |
| .attr('class', 'donut-ring') | |
| .attr('cx', 21) | |
| .attr('cy', 21) | |
| .attr('r', 15.91549430918954) | |
| .attr('fill', 'transparent') | |
| .attr('stroke', "#d2d3d4") | |
| .attr('stroke-width', '3px') | |
| data.map((d,i)=>{ | |
| oneDonut(d,i) | |
| }) | |
| } | |
| function initData(){ | |
| const data = | |
| [{ | |
| "color": "#00c389", | |
| "name": "Low", | |
| "range_end": 30, | |
| "range_start": 0, | |
| "count": 217, | |
| "share": 83, | |
| "bar_range_start": 0, | |
| "bar_range_end": 83 | |
| }, | |
| { | |
| "color": "#ffc800", | |
| "name": "Mid", | |
| "range_end": 70, | |
| "range_start": 30, | |
| "count": 24, | |
| "share": 9, | |
| "bar_range_start": 83, | |
| "bar_range_end": 92 | |
| }, | |
| { | |
| "color": "#ff5000", | |
| "name": "High", | |
| "range_end": 100, | |
| "range_start": 70, | |
| "count": 17, | |
| "share": 6, | |
| "bar_range_start": 92, | |
| "bar_range_end": 98 | |
| }, | |
| { | |
| "name": "RISK", | |
| "color": "#000000", | |
| "count": 4, | |
| "share": 2, | |
| "bar_range_start": 98, | |
| "bar_range_end": 100 | |
| }] | |
| return data | |
| } | |
| function oneDonut(donut,i){ | |
| svg.append('circle') | |
| .attr('class', 'donut-segment') | |
| .attr('cx', 21) | |
| .attr('cy', 21) | |
| .attr('r', 15.91549430918954) | |
| .attr('fill', 'transparent') | |
| .attr('stroke-width', '3px') | |
| .attr('stroke', donut.color) | |
| .attr('stroke-dasharray', donut.share + ' ' + (100 - donut.share)) | |
| .attr('stroke-dashoffset', updatePercent(donut, i)) | |
| } | |
| function updatePercent(donut, i){ | |
| if(i === 0){ | |
| var firstOffset = donut.share | |
| previousValues.push(firstOffset) | |
| var strokeDashOffset = startOffset | |
| }else{ | |
| var strokeDashOffset = startOffset + 100 - previousValues.reduce((a, b) => a + b, 0) | |
| previousValues.push(donut.share) | |
| } | |
| return strokeDashOffset | |
| } | |
| drawDonutChart() |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| </style> | |
| </head> | |
| <body> | |
| <svg width="100%" height="100%" viewBox="0 0 42 42" class="donut"></svg> | |
| <script src="donutChart.js"></script> | |
| </body> | |
| </html> |
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