解决页面echarts 图表 resize问题
左侧的菜单栏模块是可以收缩的，点击左上角的 icon 可以收缩，但是点击左上角的icon后，右侧的echarts图并未进行对应的收缩，使用 element-resize-detector 插件能够解决问题（如何解决Vue项目中使用echarts，宽度变化导致图不能resize问题）但是会有点卡顿，所以采用原生的方法来处理，再结合windows 自带的原生 resize 事件处理 浏览器宽度高度变化，可以不使用插件来处理问题了。
<template>
<div
id="leftEchartPie"
ref="leftEchartPie"
></div>
</template>
<script>
export default {
props: {
leftPieData: {
type: Object,
default: {}
}
},
data() {
return {
myChart: null,
option: null,
observe: null,
optionData: []
};
},
watch: {
leftPieData: {
deep: true,
handler(leftPieData) {
if (leftPieData) {
this.initChart(leftPieData);
}
}
}
},
mounted() {
const option = {
title: {
zlevel: 0,
text: null,
rich: {
value: {
color: "#3F495A",
fontSize: 14,
lineHeight: 16
},
name: {
color: "#3F495A",
fontSize: 14,
lineHeight: 16
}
},
top: "center",
left: "19.3%",
textAlign: "center",
textStyle: {
rich: {
value: {
color: "#3F495A",
fontSize: 14,
lineHeight: 16
},
name: {
fontSize: 16,
color: "#3F495A",
lineHeight: 30
}
}
}
},
tooltip: {
show: true,
trigger: "item",
formatter: "{a} <br/>{b}: {c} ({d}%)"
},
legend: {},
series: [
{
name: "Security Status",
type: "pie",
center: ["20%", "50%"],
radius: ["80%", "45%"],
itemStyle: {
borderWidth: 6,
borderColor: "#fff"
},
hoverAnimation: false,
avoidLabelOverlap: false,
label: {
show: false,
position: "center"
},
emphasis: {
label: {
show: false,
fontSize: "30",
fontWeight: "bold"
}
},
labelLine: {
show: false
},
data: []
}
]
};
this.option = option;
var dom = document.getElementById("leftEchartPie");
var myChart = this.echarts.init(dom);
this.myChart = myChart;
// 使用浏览器原生的MutationObserver来处理
const observer = new MutationObserver(() => {
setTimeout(this.myChart.resize, 201);
});
const config = { attributes: true, childList: true, subtree: false };
this.observe = observer;
observer.observe(document.getElementsByClassName("spoc-menu")[0], config);
// 处理浏览器窗口大小变化触发resize
window.addEventListener("resize", this.resizeEchart, true);
},
beforeDestroy() {
this.observe.dis;
window.removeEventListener("resize", this.resizeEchart, true);
},
methods: {
resizeEchart() {
this.myChart.resize();
},
initChart(leftPieData) {
this.option.text = [
"{name|Total}",
"{value|" + leftPieData.totalNum + "}"
].join("\n");
this.option.legend.data = [
`Very High Risk`,
`High Risk`,
`Medium Risk`,
`Low Risk`,
`Very Low Risk`
];
this.option.series[0].data = [
{
value: this.leftPieData.veryHighRiskNum,
name: `Very High Risk`,
itemStyle: {
color: "#FF4D4F"
}
},
{
value: this.leftPieData.highRiskNum,
name: `High Risk`,
itemStyle: {
color: "#FA9314"
}
},
{
value: this.leftPieData.mediumRiskNum,
name: `Medium Risk`,
itemStyle: {
color: "#FACB14"
}
},
{
value: this.leftPieData.lowRiskNum,
name: `Low Risk`,
itemStyle: {
color: "#4ED6CC"
}
},
{
value: this.leftPieData.veryLowNum,
name: `Very Low Risk`,
itemStyle: {
color: "#2BD374"
}
}
];
this.optionData = this.option.series[0].data;
const optionData = this.optionData;
this.option.legend = {
textStyle: {
fontSize: 14,
color: "#3F495A"
},
orient: "vertical",
left: "60%",
itemGap: 30, // 字高
top: "middle",
icon: "circle",
itemHeight: 10, //改变圆圈大小
// data: [],
formatter(params) {
if (optionData.length) {
switch (params) {
case "Very High Risk":
return params + " " + optionData[0].value;
break;
case "High Risk":
return params + " " + optionData[1].value;
break;
case "Medium Risk":
return params + " " + optionData[2].value;
break;
case "Low Risk":
return params + " " + optionData[3].value;
break;
case "Very Low Risk":
return params + " " + optionData[4].value;
break;
default:
return "";
}
}
}
};
// 绘制图表
this.myChart.setOption(this.option);
}
}
};
</script>
<style>
#leftEchartPie {
width: 100%;
height: calc(100% - 60px);
}
</style>
核心代码
// 使用浏览器原生的MutationObserver来处理
const observer = new MutationObserver(() => {
setTimeout(this.myChart.resize, 201);
});
const config = { attributes: true, childList: true, subtree: false };
this.observe = observer;
observer.observe(document.getElementsByClassName("spoc-menu")[0], config);
// 处理浏览器窗口大小变化触发resize
window.addEventListener("resize", this.resizeEchart, true);
关于MutationObserver的使用 参考
最后注意需要beforeDestroy 里面销毁掉 监听的时间和 MutationObserver 监听的事件，避免事件一直在页面里面，消耗内存。
最后开发完后，对比了下和之前使用的插件，原生js处理的体验比插件反应快，插件给人的感觉盾一点
ok 这就是关于 vue 结合原生js 解决echarts resize问题 的开发心得啦 ~希望能给大家一个参考，也希望大家多多支持脚本之家。
