我使用画布的宽度和高度如下
<canvas id="myChart" height="400" width="400" ></canvas>
但是，渲染页面后，画布会以某种方式变为
<canvas height="1643" id="myChart" width="1643" style="display: block; width: 1643px; height: 1643px;"></canvas>
我发现了类似的问题，这种解决方案也对我有效，
options: {
responsive: false
}
但是我不确定那是关闭响应选项的正确解决方案，因为那是chart.js中很酷的事情之一
我的代码
<Html>
<head>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.2.2/Chart.js" ></script>
</head>
<Body>
<canvas id="myChart" height="400" width="400" ></canvas>
</Body>
<script>
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Steps',
data: [12, 19, 3, 5, 2, 3],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 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
},
{
label: "Goal Line",
type:'line',
data: [{x:0,y:10},{x:0,y:10},{x:0,y:10},{x:0,y:10},{x:0,y:10},{x:0,y:10}],
fill: false,
pointRadius:[0,0,0,0,0,0,0],
borderWidth: 5,
borderColor: "rgba(243, 52, 52,1)",
borderJoinStyle: 'miter',
}
]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true
},
}],
xAxes: [{
ticks: {
beginAtZero:true
},
}]
},
}
});
</script>
</Html>
如果要避免图表太大或太小，可以使用css max-width和min-width：
<canvas id="myChart" height="400" width="400" style="min-width: 200px; max-width: 600px"></canvas>
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