最近在写数据可视化，长期跑在大屏上，但是总会遇到浏览器崩溃的问题，最终发现是定时器刷新加载函数，重复创建echarts示例的原因，不清空会一直占内存，导致超出浏览器堆内存页面崩溃，下面是测试可以看到内存一直再增加。
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <style> div { width: 500px; height: 500px; } </style> <body> <div id="main"> </div> </body> <script src="./src/js/ins/echarts.min.js"></script> <script> function chart() { var chartDom = document.getElementById('main'); myChart = echarts.init(chartDom); var option; option = { xAxis: { type: 'category', data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'] }, yAxis: { type: 'value' }, series: [ { data: [150, 230, 224, 218, 135, 147, 260], type: 'line' } ] }; option && myChart.setOption(option); } setInterval(() => { chart() }, 1); </script> </html>
解决方法：echarts的销毁函数dispose()
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <style> div { width: 500px; height: 500px; } </style> <body> <div id="main"> </div> </body> <script src="https://cdn.jsdelivr.net/npm/echarts@5.2.1/dist/echarts.min.js"></script> <script> //我在这 var myChart = null; function chart() { //我在这 if (myChart) { myChart.dispose(); // 销毁之前的 ECharts 实例 } var chartDom = document.getElementById('main'); myChart = echarts.init(chartDom); var option; option = { xAxis: { type: 'category', data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'] }, yAxis: { type: 'value' }, series: [ { data: [150, 230, 224, 218, 135, 147, 260], type: 'line' } ] }; option && myChart.setOption(option); } setInterval(() => { chart() }, 1); </script> </html>
