我曾尝试使用react-chartjs 2制作饼图,它在桌面视图中工作良好,但在移动视图中图例没有响应,它占用了很多空间,因此饼图的大小变得非常小。
我的代码:
function Chart(props: any) {
const option = {
tooltips: {enter image description here
callbacks: {
label: function (tooltipItem: any, data: any) {
var dataset = data.datasets[tooltipItem.datasetIndex];
var meta = dataset._meta[Object.keys(dataset._meta)[0]];
var total = meta.total;
var currentValue = dataset.data[tooltipItem.index];
var percentage = parseFloat(
((currentValue / total) * 100).toFixed(1)
);
return currentValue + " (" + percentage + "%)";
},
title: function (tooltipItem: any, data: any) {
return data.labels[tooltipItem[0].index];
},
},
},
legend: {
display: true,
labels: {
fontSize: 12,
},
position: "right",
},
};
return (
<div className="chart">
<Pie data={props.ChartData} options={option} />
</div>
);发布于 2021-03-25 16:32:08
您可以将fontSize对象设置为ternery操作符,该操作符检查fontSize (或其他内容)以查看您是否在移动设备上,并根据它返回正确的widts
如果因为屏幕尺寸变化而想要实时更新它,可以通过在resizeEvent listner中改变图表选项本身来实现
var options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderWidth: 1
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderWidth: 1
}
]
},
options: {
legend: {
labels: {
fontSize: window.innerWidth > 350 ? 20 : 10
}
},
scales: {
yAxes: [{
ticks: {
reverse: false
}
}]
}
}
}
var ctx = document.getElementById('chartJSContainer').getContext('2d');
const chart = new Chart(ctx, options);
window.addEventListener('resize', () => {
if (window.innerWidth < 350) {
chart.options.legend.labels.fontSize = 10;
} else {
chart.options.legend.labels.fontSize = 20
}
});<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.js" integrity="sha512-hZf9Qhp3rlDJBvAKvmiG+goaaKRZA6LKUO35oK6EsM0/kjPK32Yw7URqrq3Q+Nvbbt8Usss+IekL7CRn83dYmw==" crossorigin="anonymous"></script>
</body>
https://stackoverflow.com/questions/66795383
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