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100 lines
1.8 KiB
Markdown
100 lines
1.8 KiB
Markdown
# Line Chart
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```js chart-editor
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// <block:setup:2>
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const DATA_COUNT = 12;
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Utils.srand(110);
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const actions = [
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{
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name: 'Randomize',
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handler(chart) {
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chart.data.datasets.forEach(dataset => {
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dataset.data = generateData();
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});
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chart.update();
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}
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},
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];
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// </block:setup>
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// <block:data:1>
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function generateData() {
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return Utils.numbers({
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count: DATA_COUNT,
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min: 0,
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max: 100
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});
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}
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const data = {
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labels: Utils.months({count: DATA_COUNT}),
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datasets: [{
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data: generateData()
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}]
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};
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// </block:data>
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// <block:options:0>
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function getLineColor(ctx) {
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return Utils.color(ctx.datasetIndex);
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}
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function alternatePointStyles(ctx) {
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const index = ctx.dataIndex;
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return index % 2 === 0 ? 'circle' : 'rect';
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}
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function makeHalfAsOpaque(ctx) {
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return Utils.transparentize(getLineColor(ctx));
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}
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function adjustRadiusBasedOnData(ctx) {
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const v = ctx.parsed.y;
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return v < 10 ? 5
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: v < 25 ? 7
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: v < 50 ? 9
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: v < 75 ? 11
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: 15;
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}
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const config = {
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type: 'line',
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data: data,
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options: {
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plugins: {
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legend: false,
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tooltip: true,
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},
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elements: {
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line: {
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fill: false,
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backgroundColor: getLineColor,
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borderColor: getLineColor,
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},
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point: {
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backgroundColor: getLineColor,
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hoverBackgroundColor: makeHalfAsOpaque,
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radius: adjustRadiusBasedOnData,
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pointStyle: alternatePointStyles,
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hoverRadius: 15,
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}
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}
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}
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};
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// </block:options>
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module.exports = {
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actions,
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config,
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};
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```
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## Docs
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* [Line](../../charts/line.html)
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* [Point Styling](../../charts/line.html#point-styling)
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* [Options](../../general/options.html)
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* [Scriptable Options](../../general/options.html#scriptable-options)
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* [Data structures (`labels`)](../../general/data-structures.html)
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