vue ref和$refs获取dom元素

vue ref和$refs获取dom元素

**创建 工程：
H:\java_work\java_springboot\vue_study

ctrl按住不放 右键 悬着 powershell

H:\java_work\java_springboot\js_study\Vue2_3入门到实战-配套资料\01-随堂代码素材\day04\准备代码\14-ref和$refs获取dom对象

vue --version
vue create v-ref-demo
cd v-ref-demo
npm install echarts --save
npm i echarts-wordcloud --save
npm audit fix --force
npm cache clean --force
npm run serve

补充：
是 npm i echarts --save-dev
是npm i echarts，这样去安装
是 npm i echarts --save-dev

App.vue

<template>
  <div class="app">
    <div class="base-chart-box">我是一个捣乱的盒子</div>
    <BaseChart></BaseChart>
  </div>
</template>

<script>
import BaseChart from "./components/BaseChart.vue";
export default {
  components: {
    BaseChart,
  },
};
</script>

<style>
.base-chart-box {
  width: 200px;
  height: 100px;
}
</style>
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BaseChart.vue

<template>
  <div ref="mychart" class="base-chart-box">子组件</div>
</template>

<script>
import * as echarts from "echarts";
export default {
  mounted() {
    // 基于准备好的dom，初始化echarts实例
    const myChart = echarts.init(this.$refs.mychart);
    //const myChart = echarts.init(document.querySelector(".base-chart-box"));
    // 绘制图表
    myChart.setOption({
      title: {
        text: "ECharts 入门示例",
      },
      tooltip: {},
      xAxis: {
        data: ["衬衫", "羊毛衫", "雪纺衫", "裤子", "高跟鞋", "袜子"],
      },
      yAxis: {},
      series: [
        {
          name: "销量",
          type: "bar",
          data: [5, 20, 36, 10, 10, 20],
        },
      ],
    });
  },
};
</script>

<style scoped>
.base-chart-box {
  width: 400px;
  height: 300px;
  border: 3px solid #000;
  border-radius: 6px;
}
</style>
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