HTML
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" />
<title>Chart.js Bar Chart</title>
<meta name="keywords" content="LightYear,光年,后台模板,后台管理系统,光年HTML模板">
<meta name="description" content="LightYear是一个基于Bootstrap的后台管理系统的HTML模板。">
<meta name="author" content="yinqi">
<link rel="stylesheet" type="text/css" href="http://lyear.itshubao.com/v4/css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="http://lyear.itshubao.com/v4/css/style.min.css">
</head>
<body>
<div class="chart-example">
<div class="tab-content">
<div class="chart-view"><canvas id="myChart"></canvas></div>
<div class="chart-actions mt-3"></div>
<ul class="nav nav-tabs mt-3">
<li class="nav-item">
<a class="nav-link active" data-toggle="tab" href="#myChart-options" aria-selected="true">Options</a>
</li>
<li class="nav-item">
<a class="nav-link" data-toggle="tab" href="#myChart-data" aria-selected="false">Data</a>
</li>
<li class="nav-item">
<a class="nav-link" data-toggle="tab" href="#myChart-setup" aria-selected="false">Setup</a>
</li>
</ul>
<div class="tab-content">
<div class="tab-pane fade show active tab-pane-code" id="myChart-options">
<pre>
function colorize(opaque) {
return (ctx) => {
const v = ctx.parsed.y;
const c = v < -50 ? '#D60000'
: v < 0 ? '#F46300'
: v < 50 ? '#0358B6'
: '#44DE28';
return opaque ? c : Utils.transparentize(c, 1 - Math.abs(v / 150));
};
}
const config = {
type: 'bar',
data: data,
options: {
plugins: {
legend: false,
},
elements: {
bar: {
backgroundColor: colorize(false),
borderColor: colorize(true),
borderWidth: 2
}
}
}
};
</pre>
</div>
<div class="tab-pane fade tab-pane-code" id="myChart-data">
<pre>
function generateData() {
return Utils.numbers({
count: DATA_COUNT,
min: -100,
max: 100
});
}
const data = {
labels: Utils.months({count: DATA_COUNT}),
datasets: [{
data: generateData(),
}]
};
</pre>
</div>
<div class="tab-pane fade tab-pane-code" id="myChart-setup">
<pre>
const DATA_COUNT = 16;
Utils.srand(110);
const actions = [
{
name: 'Randomize',
handler(chart) {
chart.data.datasets.forEach(dataset => {
dataset.data = generateData();
});
chart.update();
}
},
];
</pre>
</div>
</div>
</div>
</div>
<script type="text/javascript" src="http://lyear.itshubao.com/v4/js/jquery.min.js"></script>
<script type="text/javascript" src="http://lyear.itshubao.com/v4/js/popper.min.js"></script>
<script type="text/javascript" src="http://lyear.itshubao.com/v4/js/bootstrap.min.js"></script>
<script type="text/javascript" src="https://cdn.bootcdn.net/ajax/libs/Chart.js/4.1.1/chart.umd.min.js"></script>
<script type="text/javascript" src="https://cdn.bootcdn.net/ajax/libs/luxon/3.2.0/luxon.min.js"></script>
<script type="text/javascript" src="http://libs.itshubao.com/chartjs/utils.js"></script>
</body>
</html>
CSS
body{
background: #fff;
}
.tab-content .chart-view {
max-width: 800px;
}
.tab-content .tab-pane-code {
height: 360px;
overflow: auto;
}
.tab-content .tab-pane-code pre {
height: 100%;
margin: 0px;
}
.chart-example {
width: calc(100% - 2px);
border: 1px solid #ececec;
padding: 10px;
}
JavaScript
const DATA_COUNT = 16;
Utils.srand(110);
const actions = [
{
name: 'Randomize',
handler(chart) {
chart.data.datasets.forEach(dataset => {
dataset.data = generateData();
});
chart.update();
}
},
];
function generateData() {
return Utils.numbers({
count: DATA_COUNT,
min: -100,
max: 100
});
}
const data = {
labels: Utils.months({count: DATA_COUNT}),
datasets: [{
data: generateData(),
}]
};
function colorize(opaque) {
return (ctx) => {
const v = ctx.parsed.y;
const c = v < -50 ? '#D60000'
: v < 0 ? '#F46300'
: v < 50 ? '#0358B6'
: '#44DE28';
return opaque ? c : Utils.transparentize(c, 1 - Math.abs(v / 150));
};
}
const config = {
type: 'bar',
data: data,
options: {
plugins: {
legend: false,
},
elements: {
bar: {
backgroundColor: colorize(false),
borderColor: colorize(true),
borderWidth: 2
}
}
}
};
const ctx = document.getElementById('myChart');
const chart = new Chart(ctx, config);
$.each(actions, function(index, value) {
let aHtml = $('<a></a>').addClass('btn btn-default m-r-5').html(value.name);
$('.chart-actions').append(aHtml);
aHtml.on('click', function () {
value.handler(chart);
});
});