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27 lines
572 B
JavaScript
27 lines
572 B
JavaScript
function slope({p0, p1}) {
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return (p0.y - p1.y) / (p1.x - p0.x);
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}
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module.exports = {
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config: {
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type: 'line',
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data: {
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labels: ['a', 'b', 'c', 'd', 'e', 'f'],
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datasets: [{
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data: [1, 2, 3, 3, 2, 1],
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borderColor: 'black',
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segment: {
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borderColor: ctx => slope(ctx) > 0 ? 'green' : slope(ctx) < 0 ? 'red' : undefined,
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borderDash: ctx => slope(ctx) < 0 ? [5, 5] : undefined
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}
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}]
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},
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options: {
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scales: {
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x: {display: false},
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y: {display: false}
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}
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}
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}
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};
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