How to use vue and Element-plus to implement data filtering and statistics

How to use Vue and Element Plus to implement data filtering and statistics

Introduction: Vue, as a popular front-end framework, combined with Element Plus, a powerful UI library, can easily implement data filtering and statistics Function. This article will introduce how to use Vue and Element Plus to implement this function, and show the specific implementation process through code examples.

1. Create a project and introduce Element Plus

First, use Vue CLI on the command line to create a new project:

vue create data-filter

Then enter the project and install Element Plus ：

cd data-filter
npm install element-plus

Introduce Element Plus into the main.js file:

import { createApp } from 'vue'
import App from './App.vue'
import ElementPlus from 'element-plus'
import 'element-plus/lib/theme-chalk/index.css'

createApp(App).use(ElementPlus).mount('#app')

2. Create data sources and filter components

In App.vue, we first create a data source and a component containing filter criteria. The data source can be an array, each element is an object containing various properties. Filter components can have multiple conditions, such as text input boxes, drop-down selection boxes, etc.

<template>
  <div>
    <div class="filters">
      <el-input v-model="filterText" placeholder="请输入姓名进行筛选"></el-input>
      <el-select v-model="filterAge" placeholder="请选择年龄进行筛选">
        <el-option label="18岁以下" value="18"></el-option>
        <el-option label="18-30岁" value="18-30"></el-option>
        <el-option label="30岁以上" value="30"></el-option>
      </el-select>
    </div>
    <div class="data-list">
      <div v-for="item in filteredData" :key="item.id">{{ item.name }}</div>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      filterText: '',
      filterAge: '',
      data: [
        { id: 1, name: '张三', age: 20 },
        { id: 2, name: '李四', age: 25 },
        { id: 3, name: '王五', age: 30 },
        // ...
      ]
    }
  },
  computed: {
    filteredData() {
      return this.data.filter(item => {
        return (item.name.includes(this.filterText) || item.age.toString() === this.filterAge)
      })
    }
  }
}
</script>

In the above code, we defined a data source data in the data option, which contains some test data. The filter conditions include a text input box and a drop-down selection box, and the user can filter the data by entering a name and selecting an age. filteredData is a calculated property that is used to dynamically calculate data that meets the conditions based on the filtering conditions.

3. Writing statistical components

In addition to the filtering function, we can also perform data statistics through the chart component provided by Element Plus. In App.vue, we can write a statistical component to visually display the filtered data.

First, introduce echarts in the template, and then add a container containing the chart and a button to trigger the statistical function.

<template>
  <div>
    <div class="filters">
      <!-- 筛选组件代码 -->
    </div>
    <div class="data-list">
      <!-- 数据列表代码 -->
    </div>
    <div class="statistic-chart" ref="chart"></div>
    <el-button type="primary" @click="showStatisticChart">点击统计</el-button>
  </div>
</template>

<script>
import echarts from 'echarts'

export default {
  // ...
  methods: {
    showStatisticChart() {
      const chart = echarts.init(this.$refs.chart)
      const data = this.filteredData
      const names = data.map(item => item.name)
      const ages = data.map(item => item.age)

      const option = {
        tooltip: {},
        legend: {
          data: ['年龄']
        },
        xAxis: {
          data: names
        },
        yAxis: {},
        series: [{
          name: '年龄',
          type: 'bar',
          data: ages
        }]
      }

      chart.setOption(option)
    }
  }
}
</script>

In the showStatisticChart method, we use echarts to create a chart instance and pass in the chart container and filtered data. Then, define the style and data of the chart by setting options. In the above code, we show a simple histogram with the name on the x-axis and the age on the y-axis. Finally, call the chart.setOption method to apply the option to the chart.

4. Run the project

At this point, we have completed the coding of data filtering and statistical functions. Now run the project to see the effect.

npm run serve

Open the browser and enter http://localhost:8080 to see the running effect. Enter your name or select your age in the input box, and the data list will be updated in real time with data that meets the filtering conditions. Click the "Click Statistics" button, and a basic histogram will appear showing the age of each person.

Summary: Through Vue and Element Plus, we can easily implement data filtering and statistical functions. Using the UI components provided by Element Plus, we can quickly write pages with interactivity and visual effects. I hope this article will help you master how to use Vue and Element Plus to implement data filtering and statistics.

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