VUE 单页面使用 echart 窗口变化时的用法

在 VUE 项目中，为了使 echart 在窗口变化时能够自适应，要用到 window.resize = function(){ …….};
但是我在项目刚开始的时间就有一个地方的高度变化使用了 window.resize ，在里面再次使用 会覆盖掉原来的，所以在里面图表使用时可以用

window.addEventListener(\’resize\’,this.resizeFu,false);

resixeFu 就是图表变化时的方法

resizeFu(){
let div = document.getElementById(\’changeData\’);
if(div && this.changeData.DataTime.length>0){
this.chartsDiv.changeData.resize();
}
}

但里面有一个问题就是：每次进来当前页面都会执行 window.addEventListener
解决方法是在路由勾子函数中把它给去掉，方法是

beforeRouteLeave(to, from, next) {
//页面走掉把事件给清除掉
window.removeEventListener(\”resize\”, this.resizeFu,false);
next()
},

补充知识：vue+echart图表自适应屏幕大小、点击侧边栏展开收缩图表自适应大小resize
开发中用到了echart图表，需要图表自适应大小resize,一开始使用的方法是：

window.onresize = function () {
this.myChart.resize();
};

但是又遇到一个问题，点击侧边栏的展开收起的时候，图表的大小没有自适应（因为窗口的大小没有变化）
这里参考vue+element+admin的框架写的自适应

一、index.vue的文件
引入chart图表“

这里是数据

chartData: {
title: {
text: \’3-1(2)\’,
textStyle: {
color: \’#979797\’,
fontSize: 14
}
},
tooltip: {
trigger: \’axis\’
},
legend: {
icon: \’rect\’,
itemWidth: 4, // 图例标记的图形宽度
itemHeight: 11,
textStyle: {
lineHeight: 65,
fontSize: 14
},
data: [\’邮件营销\’, \’联盟广告\’, \’视频广告\’, \’直接访问\’, \’搜索引擎\’]
},
grid: {
left: \’3%\’,
right: \’4%\’,
bottom: \’3%\’,
containLabel: true
},
xAxis: {
type: \’category\’,
boundaryGap: false,
data: [\’周一\’, \’周二\’, \’周三\’, \’周四\’, \’周五\’, \’周六\’, \’周日\’]
},
yAxis: {
type: \’value\’
},
series: [
{
name: \’邮件营销\’,
type: \’line\’,
stack: \’总量\’,
data: [0, 132, 101, 134, 90, 230, 210]
},
{
name: \’联盟广告\’,
type: \’line\’,
stack: \’总量\’,
data: [220, 12, 191, 234, 20, 330, 10]
},
{
name: \’视频广告\’,
type: \’line\’,
stack: \’总量\’,
data: [15, 232, 201, 154, 190, 330, 110]
},
{
name: \’直接访问\’,
type: \’line\’,
stack: \’总量\’,
data: [320, 420, 301, 334, 60, 330, 320]
},
{
name: \’搜索引擎\’,
type: \’line\’,
stack: \’总量\’,
data: [820, 932, 901, 934, 1290, 1330, 1320]
}
]
}

二、chart.vue

<template>
<div :class=\”className\” :style=\”{height:height,width:width}\” />
</template>
<script>
import echarts from \’echarts\’
import resize from \’./mixins/resize\’
export default {
mixins: [resize],
props: {
className: {
type: String,
default: \’chart\’
},
width: {
type: String,
default: \’100%\’
},
height: {
type: String,
default: \’300px\’
},
autoResize: {
type: Boolean,
default: true
},
chartData: {
type: Object,
required: true
}
},
data() {
return {
chart: null
}
},
watch: {
chartData: {
deep: true,
handler(val) {
this.setOptions(val)
}
}
},
mounted() {
this.$nextTick(() => {
this.initChart()
})
},
beforeDestroy() {
if (!this.chart) {
return
}
this.chart.dispose()
this.chart = null
},
methods: {
initChart() {
this.chart = echarts.init(this.$el, \’macarons\’)
this.setOptions(this.chartData)
},
setOptions(chartData) {
this.chart.setOption(chartData)
}
}
}
</script>

三、resize.js

import { debounce } from \’./debounce\’
export default {
data() {
return {
$_sidebarElm: null
}
},
mounted() {
this.$_initResizeEvent()
this.$_initSidebarResizeEvent()
},
beforeDestroy() {
this.$_destroyResizeEvent()
this.$_destroySidebarResizeEvent()
},
// to fixed bug when cached by keep-alive
// https://github.com/PanJiaChen/vue-element-admin/issues/2116
activated() {
this.$_initResizeEvent()
this.$_initSidebarResizeEvent()
},
deactivated() {
this.$_destroyResizeEvent()
this.$_destroySidebarResizeEvent()
},
methods: {
// use $_ for mixins properties
// https://vuejs.org/v2/style-guide/index.html#Private-property-names-essential
$_resizeHandler() {
return debounce(() => {
if (this.chart) {
this.chart.resize()
}
}, 100)()
},
$_initResizeEvent() {
window.addEventListener(\’resize\’, this.$_resizeHandler)
},
$_destroyResizeEvent() {
window.removeEventListener(\’resize\’, this.$_resizeHandler)
},
$_sidebarResizeHandler(e) {
if (e.propertyName === \’width\’) {
this.$_resizeHandler()
}
},
$_initSidebarResizeEvent() {
this.$_sidebarElm = document.getElementsByClassName(\’sidebar-container\’)[0]
this.$_sidebarElm && this.$_sidebarElm.addEventListener(\’transitionend\’, this.$_sidebarResizeHandler)
},
$_destroySidebarResizeEvent() {
this.$_sidebarElm && this.$_sidebarElm.removeEventListener(\’transitionend\’, this.$_sidebarResizeHandler)
}
}
}

四、debounce.js

/**
* @param {Function} func
* @param {number} wait
* @param {boolean} immediate
* @return {*}
*/
export function debounce(func, wait, immediate) {
let timeout, args, context, timestamp, result
const later = function() {
// 据上一次触发时间间隔
const last = +new Date() – timestamp
// 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
if (last < wait && last > 0) {
timeout = setTimeout(later, wait – last)
} else {
timeout = null
// 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
if (!immediate) {
result = func.apply(context, args)
if (!timeout) context = args = null
}
}
}
return function(…args) {
context = this
timestamp = +new Date()
const callNow = immediate && !timeout
// 如果延时不存在，重新设定延时
if (!timeout) timeout = setTimeout(later, wait)
if (callNow) {
result = func.apply(context, args)
context = args = null
}
return result
}
}

以上这篇VUE 单页面使用 echart 窗口变化时的用法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。