vue3做echarts做一个简单的折线渐变图

效果

代码：

</template>
<div>
      <div class="date-change">
        <el-date-picker size="small" v-model="dateValue" value-format="YYYY-MM-DD" type="daterange" range-separator="至" start-placeholder="开始日期" end-placeholder="截至日期" format="YYYY-MM-DD" @change="changeDate($event)" />
      </div>
      <v-chart :option="lineData" :theme="theme" :autoresize="autoResize" />
    </div>
<template>
<script lang="ts">
import { defineComponent, reactive, toRefs } from "vue";
import { CanvasRenderer } from "echarts/renderers";
import { BarChart, LineChart, PieChart, MapChart, RadarChart, ScatterChart, EffectScatterChart, LinesChart } from "echarts/charts";
import { GridComponent, PolarComponent, GeoComponent, TooltipComponent, LegendComponent, TitleComponent, VisualMapComponent, DatasetComponent, ToolboxComponent, DataZoomComponent } from "echarts/components";
import VChart, { THEME_KEY } from "vue-echarts";
use([BarChart, LineChart, PieChart, MapChart, RadarChart, ScatterChart, EffectScatterChart, LinesChart, GridComponent, PolarComponent, GeoComponent, TooltipComponent, LegendComponent, TitleComponent, VisualMapComponent, DatasetComponent, CanvasRenderer, ToolboxComponent, DataZoomComponent]);
export default defineComponent({
  components: {
    VChart
  },
  provide: {
    [THEME_KEY]: "westeros"
  },
  setup() {
    const data = reactive({
    lineData: {
        tooltip: {
          // show:true,
          // 悬浮显示格式
          formatter: "{a} <br/>{b} : {c}% <br/> {a1} <br/>  {b1} : {c1}%",
          trigger: "axis" // 触发类型，在饼形图中为item
        },
        color: ["#377AF4", "#F5AE3D"], //标题颜色
        legend: {
          textStyle: {
            // 设置图例字体
            color: "#000000",
            fontSize: "12"
          },
          //线条样式 圆角
          icon: "circle",
          left: "center",
          data: ["计划负载", "实际负载"]
        },
        xAxis: {
          name: "日期",
          boundaryGap: false,
          type: "category",
          data: []
          //设置X轴 超出自动隐藏日期
          // "axisLabel":{
          //   interval: 1.5
          // }
        },
        yAxis: {
          type: "value",
          max: 100,
          axisLabel: {
            //Y轴百分比
            formatter: function (val: number) {
              return val + "%";
            }
          }
        },
        series: [
          {
            name: "计划负载",
            type: "line",
            smooth: true,
            label: {
              normal: {
                //开启折点显示数据
                // show: true,
                position: "top",
                textStyle: {
                  color: "#377AF4",
                  width: 2
                }
              }
            },
            areaStyle: {
              color: {
                //线性渐变
                type: "linear",
                x: 0,
                y: 0,
                x2: 0,
                y2: 1,
                colorStops: [
                  {
                    offset: 0,
                    color: "rgba(185, 210, 255, 0.43)" // 0% 处的颜色
                  },
                  {
                    offset: 1,
                    color: "rgba(237, 243, 255, 0)" // 100% 处的颜色
                  }
                ],
                global: false // 缺省为 false
              }
            },
            data: []
          },
          {
            type: "line",
            name: "实际负载",
            smooth: true,
            label: {
              normal: {
                //开启折点显示数据
                // show: true,
                position: "top",
                textStyle: {
                  //折线颜色
                  color: "#377AF4",
                  width: 2
                }
              }
            },
            areaStyle: {
              color: {
                //线性渐变
                x: 0,
                y: 0,
                x2: 0,
                y2: 1,
                type: "linear",
                colorStops: [
                  {
                    offset: 0,
                    color: "rgba(255, 231, 193, 1)" // 0% 处的颜色
                  },
                  {
                    offset: 1,
                    color: "rgba(255, 246, 236, 0)" // 100% 处的颜色
                  }
                ],
                global: false // 缺省为 false
              }
            },
            data: []
          }
        ] as any
      } as any,
      theme: "" as any,
      autoResize: true as boolean
    });
    return {
      ...toRefs(data)
    };
  }
  });
</script>
<style lang="less" scoped>
.echarts {
  position: absolute;
  width: 100%;
  height: 100%;
}
.date-change {
  position: absolute;
  right: 10px;
  z-index: 1;
}
</style>