1. 使用window.onresize

var myChart = echarts.init(document.getElementById('myChart'));
window.onresize = () => {
	myChart.resize()
}

优点：

可以根据窗口大小实现自适应

缺点：

• window.onresize是绑定到window上的，切换vue页面时监听依然存在
  其他页面有window.onresize事件时，会互相覆盖

2.给div绑定onresize事件

1.echart页面 引入esresize.js

import EleResize from '@/utils/esresize';

2.给div绑定事件

var myChart = echarts.init(document.getElementById('myChart'));
var resizeDiv = document.getElementById('myChart')

EleResize.on(resizeDiv, ()=> {
    myChart.resize()
})

优点：

1. 可以根据窗口大小实现自适应
2. 切换vue页面时，事件不会继续触发
3. 事件不会相互覆盖

3. 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 default EleResize

ecahrt页面使用

完整代码

<template>
    <div :class="className" :style="{ height: height, width: width }" ref="Echart" id="myChart" />
</template>

 initChart() {
            // 创建 echarts 实例。
            var myChartOne = this.$echarts.init(this.$refs.Echart)
            var resizeDiv = document.getElementById('myChart')
            EleResize.on(resizeDiv, () => {
                myChartOne.resize()
            })
            myChartOne.setOption({
                tooltip: {
                    trigger: "axis",
                    axisPointer: {
                        type: "shadow",
                    },
                },
                legend: {
                    textStyle: {
                        color: "#ffffff",
                    },
                },
                grid: {
                    top: "0%",
                    left: "3%",
                    right: "4%",
                    bottom: "1%",
                    containLabel: false,

                },
                xAxis: [
                    {
                        type: "category",
                        data: this.labelList,
                        show: false,
                    },
                ],
                yAxis: [
                    {
                        show: false,
                    }
                ],

                series: [
                    {
                        data: this.chartList,
                        type: 'bar',
                        showBackground: true,
                        backgroundStyle: {
                            color: '#585858'
                        },
                        itemStyle: {
                            color: this.type == 'inType' ? '#73C0DE' : ' #5470C6',
                        },
                    }


                ]
            });
        },