echarts时间轴折线图

前期准备

Echarts.js文件

<template>
  <div :id="id"></div>
</template>
<script>
  import echarts from 'echarts'
  import chinaJSON from '@/assets/data/chinaMap.json'
  echarts.registerMap('china', chinaJSON)
  export default {
    data () {
      return {
        chart: null
      }
    },
    props: ['id', 'option'],
    mounted () {
      let vm = this
      this.chart = echarts.init(document.getElementById(this.id))
      let baseOption = {
      }
      let options = Object.assign({}, baseOption, this.option)
      this.chart.setOption(options, {
                notMerge:true,
      })
      this.chart.on('click', function (params) {
        vm.$emit('click-chart', params)
      })
    },
    watch: {
      option: {
        handler (val, oldVal) {
          this.chart.clear()
          this.chart.setOption(val)
        },
        deep: true
      }
    },
    // beforeDestroy(){
    //   this.chart.dispose()
    // }
  }
</script>

文件chartOption.js

export function lineOptionTime(data, xname,yname) {
    let seriesData = []
    for (let n in data) {
      let seriesObj = {
        name: data[n].text,
        type: 'line',
        color: data[n].color,
        smooth: true,
        // symbol: 'none',
        symbol:'circle',
        showSymbol: false, //这两个属性可以让折线图只在鼠标进入的时候在该数据画点，而不每个数据都画点，因为每个数据都画点在数据量大的时候会非常卡。
        // areaStyle: {},//线到x轴空间区域填充
        data: data[n].data
      }
      seriesData.push(seriesObj)
    }
    const option = {
      tooltip: {
        trigger: "axis",
        axisPointer: { // 坐标轴指示器，坐标轴触发有效
          type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
      },
      formatter: (params) => {
        // console.log("params", params)
          var result = params[0].data[0] + '</br>'
          params.forEach(item => {
              if (item.data) {
                  result += `${item.marker}<span>${item.seriesName}&nbsp;&nbsp;${item.data[1]}</span></br>`
              }
          })
          return result;
      }
    },
      legend: {
        top: 0,
        right: 10,
        itemWidth: 6,
        itemHeight: 6,
        icon: 'circle',
        itemGap: 6,
        data: data.map(v => {
            return v.text
        })
      },
      grid: {
        left: "2%",
        right: "4%",
        top: "10%",
        containLabel: true
      },
      xAxis: {
        type: 'time',
        name: xname,
        boundaryGap: false,
        axisLine: {
          show: false
        },
        axisLabel: {
            color: '#555'
        },
        axisTick: {
            show: false
        },
        splitLine: {
          show: false
        }
      },
      yAxis: {
        type: 'value',
        name: yname,
        boundaryGap: [0, '100%'],
        splitLine: {
            lineStyle: {
                type: "dashed",
                color: "#DDD"
            }
        },

        axisLine: {
            show: false,
            lineStyle: {
                color: "#999"
            }
        },
        axisTick: {
            show: false
        },
        nameTextStyle: {
            color: "#555"
        },
        splitArea: {
            show: false
        },
        max: function(value) {
            console.log("value",value.max)
            let n =  (value.max + "").split(".")[0].length
           let pow = Math.pow(10, n -1) // 10, 100, 1000,.....
           let floorNUm =  Math.floor(value.max / pow) //1,2,3,4,5,.....
           let max = (floorNUm + 1) * pow
           console.log("max", max ? max : 200)
            return  max ? max : 200;
        }
      },
      dataZoom: [
        {
          type: 'inside',
          start: 0,
          end: 20
        },
        {
          start: 0,
          end: 20
        }
      ],
      series: seriesData
    }
  
    return option
  }
  

文件中使用

<echart
    id="trend_dynamic_vol_diff"
    :option="option['trend_dynamic_vol_diff']"
    ></echart>
import {Echarts} from "@/components
components: {
    Echarts
}
created(){
    let yData = {
        color: 'XXXX', // 随便写颜色值
        text: 'xxxx', // 每条线的名字
        data: [
            ['2020-01-02 10:02:24', 263],
            ['2020-01-03 01:10:20', 23],
            ['2020-01-04 9:02:14', 82],
            ['2020-01-05 10:35:54', 33],
            ['2020-01-05 12:02:24', 227]
        ]
    }
    //yData只是举例了一组数据，数据量大的时候可以有n组
this.option["trend_dynamic_vol_diff"] =     lineOptionTime(
              yData,
              "日期",
              "压差（mv）",
            );
}

效果图如下：