Chart.js & CPU 性能监控 All In One
Chart.js & CPU 性能监控 All In One
Chart.js
可视化动态 CPU 性能监控
https://github.com/chartjs/Chart.js/issues/13#issuecomment-396140908
https://codepen.io/webgeeker/pen/PapKOM
chart.js disable animation
http://www.chartjs.org/docs/latest/developers/updates.html#preventing-animations
https://www.chartjs.org/docs/latest/developers/api.html
https://stackoverflow.com/questions/21389341/disable-animation-with-charts-js
point
http://www.chartjs.org/docs/latest/charts/line.html?h=point
http://www.chartjs.org/docs/latest/configuration/elements#point-styles
// Global point options
Chart.defaults.global.elements.point.pointStyle = "circle";
// Chart.defaults.global.elements.point.pointStyle = "line";
Chart.defaults.global.elements.point.radius = 0;
Canvas
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/drawImage
crossorigin="anonymous"
SRI
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.bundle.min.js " integrity="sha256-XF29CBwU1MWLaGEnsELogU6Y6rcc5nCkhhx89nFMIDQ=" crossorigin="anonymous"></script>
CPU status monitor
- disable animation
- update data
https://codepen.io/webgeeker/pen/jKBqge
https://codepen.io/webgeeker/full/KeWWZg/
https://codepen.io/webgeeker/pen/PapKOM
<!DOCTYPE html>
<html lang="zh-Hans">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<meta name="author" content="xgqfrms">
<meta name="generator" content="VS code">
<title>CPU Memory</title>
<style>
[data-box="contanier"] {
width: 300px;
height: 200px;
}
</style>
</head>
<body>
<section>
<h1>CPU Memory</h1>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.bundle.min.js " integrity="sha256-XF29CBwU1MWLaGEnsELogU6Y6rcc5nCkhhx89nFMIDQ=" crossorigin="anonymous"></script>
<section>
<div data-box="contanier">
<canvas id="myChart" width="300" height="200"></canvas>
</div>
<script>
let data = [12, 19, 3, 5, 2, 3, 12, 9, 3, 15];
var ctx = document.getElementById("myChart").getContext("2d");
var myChart = new Chart(ctx, {
// type: "bar ",
type: "line",
data: {
labels: [" ", " ", " ", " ", " ", " ", " ", " ", " ", " "],
datasets: [{
label: "CPU 使用记录",
data: data,
backgroundColor: [
"rgba(255, 99, 132, 0.2)",
"rgba(54, 162, 235, 0.2)",
"rgba(255, 206, 86, 0.2)",
"rgba(75, 192, 192, 0.2)",
"rgba(153, 102, 255, 0.2)",
"rgba(255, 159, 64, 0.2)"
],
borderColor: [
"rgba(255,99,132,1)",
"rgba(54, 162, 235, 1)",
"rgba(255, 206, 86, 1)",
"rgba(75, 192, 192, 1)",
"rgba(153, 102, 255, 1)",
"rgba(255, 159, 64, 1)"
],
borderWidth: 1,
fill: "start",
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
},
elements: {
line: {
tension: 0,
// no smooth
}
}
}
});
// update
let flag = setInterval(() => {
let newData = data[0],
oldData = data.slice(1);
oldData.push(newData)
data = [].concat(oldData);
myChart.data.datasets[0].data = data;
myChart.update(0);
// disable animation
}, 1000);
</script>
</section>
</section>
</body>
</html>
https://stackoverflow.com/questions/17354163/dynamically-update-values-of-a-chartjs-chart
null
const RA = (datas = [], num = 1, debug = false) => {
let result = "";
let str = `${datas.toString()},`;
str = str.repeat(num);
str = str.slice(0, str.length - 1);
result = str.split(`,`);
result = result.map(item => {
let newItem = "";
if (item !== "") {
newItem = (item.trim() !== "") ? parseFloat(item) : "";
}else {
newItem = null;
}
return newItem;
});
if (debug) {
console.log(`result =\n`, result);
}
return result;
};
let a = [null];
RA(a, 3);
// [null, null, null]
chart js show percentage axis labels
axis labels
https://github.com/chartjs/Chart.js/issues/3549#issuecomment-258473774
http://www.chartjs.org/docs/latest/general/options.html
https://github.com/chartjs/Chart.js/issues/545#issuecomment-271913693
https://github.com/chartjs/Chart.js/blob/master/samples/tooltips/callbacks.html
highcharts API
https://api.hcharts.cn/highcharts
bug
https://www.cnblogs.com/xgqfrms/p/9187785.html
demos
refs
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