vue3 全局配置并使用echarts

1、安装 echarts

npm install echarts --save

2、main.js 中引入

import { createApp } from "vue";
import App from "@/App.vue";
import * as echarts from 'echarts' 
...
const app = createApp(App); 
// vue3 给原型上挂载属性
app.config.globalProperties.$echarts = echarts;

app.use(store).use(router).mount('#app');

3、组件中使用

<template>
  <div class="box right">
    <div style="padding: 10px">
      <div id="chart" style="width: 100%; height: 500px;"></div>
    </div>
  </div>
</template>

<script setup>
import { onMounted, onUnmounted, reactive, getCurrentInstance } from "vue"
import { resize } from '../utils/index'

const { proxy } = getCurrentInstance()

const app = reactive({})

onMounted(() => {
  const chart = proxy.$echarts.init(document.getElementById("chart"), 'walden');
  init(chart)
  show(chart)
  resize(chart)
})

onUnmounted(() => {
  clearInterval(interval)
})

const categories = (function () {
  let now = new Date();
  let res = [];
  let len = 10;
  while (len--) {
    res.unshift(now.toLocaleTimeString().replace(/^\D*/, ''));
    now = new Date(+now - 2000);
  }
  return res;
})();

const categories2 = (function () {
  let res = [];
  let len = 10;
  while (len--) {
    res.push(10 - len - 1);
  }
  return res;
})();

const data = (function () {
  let res = [];
  let len = 10;
  while (len--) {
    res.push(Math.round(Math.random() * 1000));
  }
  return res;
})();

const data2 = (function () {
  let res = [];
  let len = 0;
  while (len < 10) {
    res.push(+(Math.random() * 10 + 5).toFixed(1));
    len++;
  }
  return res;
})();

const option = {
  title: {
    text: '实时数据',
    textStyle: {
      color: "#FFFFFF",
      fontSize: '16px',
      fontWeight: 'normal'
    }
  },
  grid: {
    top: '15%'
  },
  tooltip: {
    trigger: 'axis',
    axisPointer: {
      type: 'cross',
      label: {
        backgroundColor: '#283b56'
      }
    }
  },
  legend: {
    textStyle: {
      color: "#FFFFFF",
      fontSize: 12,
      fontWeight: 'normal'
    }
  },
  dataZoom: {
    show: false,
    start: 0,
    end: 100
  },
  xAxis: [
    {
      type: 'category',
      boundaryGap: true,
      data: categories,
      axisLabel: {
        textStyle: {
          color: "#FFFFFF",
        }
      }
    },
    {
      type: 'category',
      boundaryGap: true,
      data: categories2,
      axisLabel: {
        textStyle: {
          color: "#FFFFFF",
        }
      }
    }
  ],
  yAxis: [
    {
      type: 'value',
      scale: true,
      max: 30,
      min: 0,
      boundaryGap: [0.2, 0.2],
      axisLabel: {
        textStyle: {
          color: "#FFFFFF",
        }
      }
    },
    {
      type: 'value',
      scale: true,
      max: 1200,
      min: 0,
      boundaryGap: [0.2, 0.2],
      axisLabel: {
        textStyle: {
          color: "#FFFFFF",
        }
      }
    }
  ],
  series: [
    {
      name: '手机',
      type: 'bar',
      xAxisIndex: 1,
      yAxisIndex: 1,
      data: data,
    },
    {
      name: '电脑',
      type: 'line',
      data: data2,
    }
  ]
};

app.count = 10;

let interval = 0;

const show = (chart) => {
  interval = setInterval(() => {
    let axisData = new Date().toLocaleTimeString().replace(/^\D*/, '');
    data.shift();
    data.push(Math.round(Math.random() * 1000));
    data2.shift();
    data2.push(+(Math.random() * 10 + 5).toFixed(1));
    categories.shift();
    categories.push(axisData);
    categories2.shift();
    categories2.push(app.count++);
    chart.setOption({
      xAxis: [
        {
          data: categories
        },
        {
          data: categories2
        }
      ],
      series: [
        {
          data: data
        },
        {
          data: data2
        }
      ]
    });
  }, 2100);
} 

const init = (chart) => {
  chart.setOption(option)
}

</script>

<style>

</style>

4、监听浏览器窗口变化

utils/index.js

export const resize = (chart) => {
  let timer = 0;
  window.addEventListener("resize", () => {
    clearTimeout(timer);

    timer = setTimeout(() => {
      chart.resize();
    }, 300);
  });
};

5、结果展示：

image.png