Progressive Line
const config = {
type: 'line',
data: {
datasets: [{
borderColor: Utils.CHART_COLORS.red,
borderWidth: 1,
radius: 0,
data: data,
},
{
borderColor: Utils.CHART_COLORS.blue,
borderWidth: 1,
radius: 0,
data: data2,
}]
},
options: {
animation,
interaction: {
intersect: false
},
plugins: {
legend: false
},
scales: {
x: {
type: 'linear'
}
}
}
};
const totalDuration = 10000;
const delayBetweenPoints = totalDuration / data.length;
const previousY = (ctx) => ctx.index === 0 ? ctx.chart.scales.y.getPixelForValue(100) : ctx.chart.getDatasetMeta(ctx.datasetIndex).data[ctx.index - 1].getProps(['y'], true).y;
const animation = {
x: {
type: 'number',
easing: 'linear',
duration: delayBetweenPoints,
from: NaN,
delay(ctx) {
if (ctx.type !== 'data' || ctx.xStarted) {
return 0;
}
ctx.xStarted = true;
return ctx.index * delayBetweenPoints;
}
},
y: {
type: 'number',
easing: 'linear',
duration: delayBetweenPoints,
from: previousY,
delay(ctx) {
if (ctx.type !== 'data' || ctx.yStarted) {
return 0;
}
ctx.yStarted = true;
return ctx.index * delayBetweenPoints;
}
}
};
const data = [];
const data2 = [];
let prev = 100;
let prev2 = 80;
for (let i = 0; i < 1000; i++) {
prev += 5 - Math.random() * 10;
data.push({x: i, y: prev});
prev2 += 5 - Math.random() * 10;
data2.push({x: i, y: prev2});
}
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