在项目中使用echart，使echart 自适应外层div 的大小

1 、在components 里面新建一个 echarts 文件夹index.vue，然后混入动态计算宽高的resize.js 方法。

index.vue

<template>
  <div>
    <div :id="echarts" :style="styles" />
  </div>
</template>

<script>
import echarts from 'echarts'
export default {
  name: 'Index',
  props: {
    styles: {
      type: Object,
      default: null
    },
    optionData: {
      type: Object,
      default: null
    }
  },
  data() {
    return {
      myChart: null
    }
  },
  computed: {
    echarts() {
      return 'echarts' + Math.ceil(Math.random() * 100)
    }
  },
  watch: {
    optionData: {
      handler(newVal, oldVal) {
        this.handleSetVisitChart()
      },
      deep: true // 对象内部属性的监听，关键。
    }
  },
  mounted: function() {
    const vm = this
    vm.$nextTick(() => {
      vm.handleSetVisitChart()
      window.addEventListener('resize', this.wsFunc)
    })
  },
  beforeDestroy() {
    window.removeEventListener('resize', this.wsFunc)
    if (!this.myChart) {
      return
    }
    this.myChart.dispose()
    this.myChart = null
  },
  methods: {
    wsFunc() {
      this.myChart.resize()
    },
    handleSetVisitChart() {
      this.myChart = echarts.init(document.getElementById(this.echarts))
      let option = null
      option = this.optionData
      // 基于准备好的dom，初始化echarts实例
      this.myChart.setOption(option, true)
    }
  }
}
</script>

<style scoped>

</style>

resize.js

import { debounce } from '@/utils'

export default {
  data() {
    return {
      $_sidebarElm: null,
      $_resizeHandler: null
    }
  },
  mounted() {
    this.initListener()
  },
  activated() {
    if (!this.$_resizeHandler) {
      // avoid duplication init
      this.initListener()
    }

    // when keep-alive chart activated, auto resize
    this.resize()
  },
  beforeDestroy() {
    this.destroyListener()
  },
  deactivated() {
    this.destroyListener()
  },
  methods: {
    // use $_ for mixins properties
    // https://vuejs.org/v2/style-guide/index.html#Private-property-names-essential
    $_sidebarResizeHandler(e) {
      if (e.propertyName === 'width') {
        this.$_resizeHandler()
      }
    },
    initListener() {
      this.$_resizeHandler = debounce(() => {
        this.resize()
      }, 100)
      window.addEventListener('resize', this.$_resizeHandler)

      this.$_sidebarElm = document.getElementsByClassName('sidebar-container')[0]
      this.$_sidebarElm && this.$_sidebarElm.addEventListener('transitionend', this.$_sidebarResizeHandler)
    },
    destroyListener() {
      window.removeEventListener('resize', this.$_resizeHandler)
      this.$_resizeHandler = null

      this.$_sidebarElm && this.$_sidebarElm.removeEventListener('transitionend', this.$_sidebarResizeHandler)
    },
    resize() {
      const { chart } = this
      chart && chart.resize()
    }
  }
}

2、组件的使用

<template>
  <echarts-from :option-data="optionData" :styles="style" />
</template>

<script>
import echartsFrom from '@/components/echarts/index'
//组册组件
export default {
components: { echartsFrom },
data(){
       retrun{
                  style: { height: '281px' },  //默认高度
                  optionData: {}, //echart  的配置数据
   }
}
</script>
//导入组件