1.使用window.onresize1.使用window.onresize
let myChart = echarts.init(document.getElementById(dom))
window.onresize = function () {

myChat.resize()
}

let myChart = echarts.init(document.getElementById(dom))
window.onresize = function () {

myChat.resize()
}
优点：可以根据窗口大小实现自适应缺点：多个图表自适应写法比较麻烦（当一个页面的图表太多时，这样写法不是很灵活）；
let myChart1 = echarts.init(document.getElementById(dom1))
let myChart2 = echarts.init(document.getElementById(dom2))
window.onresize = function () {

myChat1.resize()

myChat2.resize()
}

let myChart1 = echarts.init(document.getElementById(dom1))
let myChart2 = echarts.init(document.getElementById(dom2))
window.onresize = function () {

myChat1.resize()

myChat2.resize()
}
多个vue页面有onresize方法时，会被覆盖；当vue页面路由跳转到下一个页面时，上一个页面的onresize方法会继续执行，（这个时候下一个页面已经不需要onresize方法执行了，当图表过多时会造成页面卡顿）2.使用window.addEventListener添加resize方法2.使用window.addEventListener添加resize方法
let myChart = echarts.init(document.getElementById(dom))
let sizeFun = function () {

myChat.resize()
}
window.addEventListener('resize', sizeFun )

let myChart = echarts.init(document.getElementById(dom))
let sizeFun = function () {

myChat.resize()
}
window.addEventListener('resize', sizeFun )
优点：

可以根据窗口大小实现自适应；

将图表方法封装以后，只需要执行一遍就可以实现多个图表的自适应；

不会被覆盖


可以根据窗口大小实现自适应；将图表方法封装以后，只需要执行一遍就可以实现多个图表的自适应；不会被覆盖

缺点：

当vue页面路由跳转到下一个页面时，上一个页面的onresize方法会继续执行
当vue页面路由跳转到下一个页面时，上一个页面的onresize方法会继续执行【造成这个问题的原因是因为vue是单页面应用，echarts中的操作都是基于window，当然也可以使用window.removeEventListener在下一个页面删除绑定的方法】点击查看window.removeEventListener使用注意点点击查看window.removeEventListener使用注意点3.实现在div使用onresize方法3.实现在div使用onresize方法github项目地址，喜欢的小伙伴给个star,谢谢github项目地址，喜欢的小伙伴给个star,谢谢实现原理：在div上实现类似window的onresize 监听，这样既能实现图表的自适应，也不会因为页面跳转之后继续执行三个页面的onresize 方法实现方法：引入esresize.js（文末贴上代码）在div上绑定对应onresize 方法优点：

可以根据窗口大小实现自适应

页面跳转不会执行上次操作

多个方法不会覆盖


可以根据窗口大小实现自适应页面跳转不会执行上次操作多个方法不会覆盖

缺点：暂无发现（如有问题，欢迎各位补充）文章参考：JS监听div的resize事件JS监听div的resize事件esresize.js代码
var EleResize = {
_handleResize: function (e) {
var ele = e.target || e.srcElement
var trigger = ele.__resizeTrigger__
if (trigger) {
var handlers = trigger.__z_resizeListeners
if (handlers) {
var size = handlers.length
for (var i = 0; i < size; i++) {
var h = handlers[i]
var handler = h.handler
var context = h.context
handler.apply(context, [e])
}
}
}
},
_removeHandler: function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (handlers) {
var size = handlers.length
for (var i = 0; i < size; i++) {
var h = handlers[i]
if (h.handler === handler && h.context === context) {
handlers.splice(i, 1)
return
}
}
}
},
_createResizeTrigger: function (ele) {
var obj = document.createElement('object')
obj.setAttribute('style',
'display: block; position: absolute; top: 0; left: 0; height: 100%; width: 100%; overflow: hidden;opacity: 0; pointer-events: none; z-index: -1;')
obj.onload = EleResize._handleObjectLoad
obj.type = 'text/html'
ele.appendChild(obj)
obj.data = 'about:blank'
return obj
},
_handleObjectLoad: function (evt) {
this.contentDocument.defaultView.__resizeTrigger__ = this.__resizeElement__
this.contentDocument.defaultView.addEventListener('resize', EleResize._handleResize)
}
}
if (document.attachEvent) { // ie9-10
EleResize.on = function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (!handlers) {
handlers = []
ele.__z_resizeListeners = handlers
ele.__resizeTrigger__ = ele
ele.attachEvent('onresize', EleResize._handleResize)
}
handlers.push({
handler: handler,
context: context
})
}
EleResize.off = function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (handlers) {
EleResize._removeHandler(ele, handler, context)
if (handlers.length === 0) {
ele.detachEvent('onresize', EleResize._handleResize)
delete ele.__z_resizeListeners
}
}
}
} else {
EleResize.on = function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (!handlers) {
handlers = []
ele.__z_resizeListeners = handlers

if (getComputedStyle(ele, null).position === 'static') {
ele.style.position = 'relative'
}
var obj = EleResize._createResizeTrigger(ele)
ele.__resizeTrigger__ = obj
obj.__resizeElement__ = ele
}
handlers.push({
handler: handler,
context: context
})
}
EleResize.off = function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (handlers) {
EleResize._removeHandler(ele, handler, context)
if (handlers.length === 0) {
var trigger = ele.__resizeTrigger__
if (trigger) {
trigger.contentDocument.defaultView.removeEventListener('resize', EleResize._handleResize)
ele.removeChild(trigger)
delete ele.__resizeTrigger__
}
delete ele.__z_resizeListeners
}
}
}
}
export {EleResize}


var EleResize = {
_handleResize: function (e) {
var ele = e.target || e.srcElement
var trigger = ele.__resizeTrigger__
if (trigger) {
var handlers = trigger.__z_resizeListeners
if (handlers) {
var size = handlers.length
for (var i = 0; i < size; i++) {
var h = handlers[i]
var handler = h.handler
var context = h.context
handler.apply(context, [e])
}
}
}
},
_removeHandler: function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (handlers) {
var size = handlers.length
for (var i = 0; i < size; i++) {
var h = handlers[i]
if (h.handler === handler && h.context === context) {
handlers.splice(i, 1)
return
}
}
}
},
_createResizeTrigger: function (ele) {
var obj = document.createElement('object')
obj.setAttribute('style',
'display: block; position: absolute; top: 0; left: 0; height: 100%; width: 100%; overflow: hidden;opacity: 0; pointer-events: none; z-index: -1;')
obj.onload = EleResize._handleObjectLoad
obj.type = 'text/html'
ele.appendChild(obj)
obj.data = 'about:blank'
return obj
},
_handleObjectLoad: function (evt) {
this.contentDocument.defaultView.__resizeTrigger__ = this.__resizeElement__
this.contentDocument.defaultView.addEventListener('resize', EleResize._handleResize)
}
}
if (document.attachEvent) { // ie9-10
EleResize.on = function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (!handlers) {
handlers = []
ele.__z_resizeListeners = handlers
ele.__resizeTrigger__ = ele
ele.attachEvent('onresize', EleResize._handleResize)
}
handlers.push({
handler: handler,
context: context
})
}
EleResize.off = function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (handlers) {
EleResize._removeHandler(ele, handler, context)
if (handlers.length === 0) {
ele.detachEvent('onresize', EleResize._handleResize)
delete ele.__z_resizeListeners
}
}
}
} else {
EleResize.on = function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (!handlers) {
handlers = []
ele.__z_resizeListeners = handlers

if (getComputedStyle(ele, null).position === 'static') {
ele.style.position = 'relative'
}
var obj = EleResize._createResizeTrigger(ele)
ele.__resizeTrigger__ = obj
obj.__resizeElement__ = ele
}
handlers.push({
handler: handler,
context: context
})
}
EleResize.off = function (ele, handler, context) {
var handlers = ele.__z_resizeListeners
if (handlers) {
EleResize._removeHandler(ele, handler, context)
if (handlers.length === 0) {
var trigger = ele.__resizeTrigger__
if (trigger) {
trigger.contentDocument.defaultView.removeEventListener('resize', EleResize._handleResize)
ele.removeChild(trigger)
delete ele.__resizeTrigger__
}
delete ele.__z_resizeListeners
}
}
}
}
export {EleResize}