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

<script>
import * as echarts from 'echarts';
export default {
  name: 'echart',
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    id: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '100%'
    },
    options: {
      type: Object,
      default: ()=>({})
    }
  },
  data () {
    return {
      chart: null
    }
  },
  watch: {
    options: {
      handler (options) {
        // 设置true清空echart缓存
        this.chart.setOption(options, true)
      },
      deep: true
    }
  },
  mounted () {
    this.initChart();
  },
  beforeDestroy () {
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart () {
      // 初始化echart
      this.chart = echarts.init(this.$el)
      this.chart.setOption(this.options, true)
      this.chart.on('click', event => {
        this.$emit('chartClick', event)
      })
    }
  }
}
</script>

<style>
</style>
