我面临的问题是我有 2 个图表，用 Chart.js 制作，它们包含动态标签描述，如果一些标签描述太长，图表会变小，但我需要两个图表包含相同的高度。
如何配置 Chart.js 来缩短标签，并在鼠标悬停时显示完整的标签，如 HTML 标题，以保持标签区域的高度？
我需要的是保持图表区域的高度，无论标签有多长。
var options = {
//maintainAspectRatio: false,
responsive:true,
scales: {
yAxes: [{
ticks: {
beginAtZero:true
}
}]
}
};
var ctx = document.getElementById("myCanvas1");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Red", "Blue yjfid ", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
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
}]
},
options: options
});
var ctx = document.getElementById("myCanvas2");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
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
}]
},
options: options
});div{
display: inline-block;
width: 49%;
}<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<script src="https://code.jquery.com/jquery-3.1.0.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.js"></script>
<div>
<canvas id="myCanvas1" ></canvas>
</div>
<div>
<canvas id="myCanvas2"></canvas>
</div>
</body>
</html>最佳答案
此答案引用自post .On mouse hover you can see tooltip showing full label name
var options = {
scales: {
xAxes: [{
ticks: {
callback: function(value) {
if (value.length > 4) {
return value.substr(0, 4) + '...'; //truncate
} else {
return value
}
},
}
}],
yAxes: [{}]
},
tooltips: {
enabled: true,
mode: 'label',
callbacks: {
title: function(tooltipItems, data) {
var idx = tooltipItems[0].index;
return 'Title:' + data.labels[idx]; //do something with title
},
label: function(tooltipItems, data) {
//var idx = tooltipItems.index;
//return data.labels[idx] + ' €';
return tooltipItems.xLabel + ' €';
}
}
},
};
var ctx = document.getElementById("myCanvas1");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Red", "Blue mbkjbjkbjlkbk", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
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
}]
},
options: options
});
var ctx = document.getElementById("myCanvas2");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
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
}]
},
options: options
});div {
display: inline-block;
width: 49%;
}<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<script src="https://code.jquery.com/jquery-3.1.0.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.js"></script>
<div>
<canvas id="myCanvas1"></canvas>
</div>
<div>
<canvas id="myCanvas2"></canvas>
</div>
</body>
</html>关于javascript - 如何缩短 Chart.js 标签，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44396737/