vue中使用echarts 使用記錄

僅以此記錄下個人使用echart的方法，畢竟好記性不如爛筆頭。

參考資料

手摸手，帶你用vue擼後臺 系列三(實戰篇)

安裝echarts

npm install echarts --save

echarts package版本

"echarts": "^4.2.0-rc.2"

utils

export function debounce (func, wait, immediate) {
  let timeout, args, context, timestamp, result

  const later = function () {
    // 據上一次觸發時間間隔
    const last = +new Date() - timestamp

    // 上次被包裝函數被調用時間間隔last小於設定時間間隔wait
    if (last < wait && last > 0) {
      timeout = setTimeout(later, wait - last)
    } else {
      timeout = null
      // 如果設定爲immediate===true，因爲開始邊界已經調用過了此處無需調用
      if (!immediate) {
        result = func.apply(context, args)
        if (!timeout) context = args = null
      }
    }
  }

  return function (...args) {
    context = this
    timestamp = +new Date()
    const callNow = immediate && !timeout
    // 如果延時不存在，重新設定延時
    if (!timeout) timeout = setTimeout(later, wait)
    if (callNow) {
      result = func.apply(context, args)
      context = args = null
    }

    return result
  }
}

chart組件代碼

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

<script>
import echarts from 'echarts'
import { debounce } from '@/utils'

export default {
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '350px'
    },
    autoResize: {
      type: Boolean,
      default: true
    },
    chartData: {
      type: Object
    }
  },
  data () {
    return {
      chart: null
    }
  },
  mounted () {
    this.initChart()
    if (this.autoResize) {
      this.__resizeHanlder = debounce(() => {
        if (this.chart) {
          this.chart.resize()
        }
      }, 100)
      window.addEventListener('resize', this.__resizeHanlder)
    }
  },
  beforeDestroy () {
    if (!this.chart) {
      return
    }
    if (this.autoResize) {
      window.removeEventListener('resize', this.__resizeHanlder)
    }

    this.chart.dispose()
    this.chart = null
  },
  watch: {
    chartData: {
      deep: true,
      handler (val) {
        this.setOptions(val)
      }
    }
  },
  methods: {
    setOptions (val) {
      this.chart.clear() // 清空畫布
      this.chart.setOption(val)
    },
    initChart () {
      this.chart = echarts.init(this.$el, 'macarons')
      this.setOptions(this.chartData)
    }
  }
}
</script>

使用方法

<template>
    <div>
        <charts :chartData="Option"></charts>
    </div>
</template>

<script>
import Charts '@/components/Charts'

export default {
  name: 'chartDemo',
  components: {
    Charts
  },
  data () {
    return {
      Option: {}
    }
  },
  mounted () {
    this.getList()
  },
  methods: {
    getList () {
        this.Option = {
            xAxis: {
                type: 'category',
                data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
            },
            yAxis: {
                type: 'value'
            },
            series: [{
                data: [820, 932, 901, 934, 1290, 1330, 1320],
                type: 'line'
            }]
        }
    }
  }
</script>