How to achieve real-time updating and real-time display of data through Vue and Element Plus

Introduction:
Vue is a popular front-end framework and a progressive framework for building user interfaces. Element Plus is a desktop component library based on Vue 3.0. It provides a wealth of UI components and tools to help developers quickly build beautiful interfaces. In actual development, we often need to implement real-time update and real-time display of data. This article will describe how to implement real-time update and real-time display of data based on Vue and Element Plus, and provide corresponding code examples.

1. Use Vue to achieve real-time update of data
In Vue, we can achieve real-time update of data by using data binding and listening properties. The following are some commonly used methods to achieve real-time updating of data:

1. Use data binding:
   Vue provides syntax sugar for data binding, which can directly bind data to DOM elements in the template. Defined, when the data changes, the DOM elements will automatically update. For example:

<template>
  <div>{{ message }}</div>
</template>
    
<script>
export default {
  data() {
    return {
      message: 'Hello Vue!'
    }
  }
}
</script>

In the above code, we bind the message data to the <div> element. When message When the value changes, the content of the <div> element is updated accordingly.

2. Use listening attributes:
   Vue also provides the watch attribute to listen for changes in data. We can monitor specific data by defining an observer function in watch. For example:

<template>
  <div>{{ count }}</div>
</template>
    
<script>
export default {
  data() {
    return {
      count: 0
    }
  },
  watch: {
    count(newValue, oldValue) {
      console.log(`count 的值從 ${oldValue} 變?yōu)?${newValue}`)
    }
  }
}
</script>

In the above code, we define a count data and set the observer function in watch. When the value of count changes, the observer function will be triggered, and we can perform corresponding operations in the observer function.

2. Use Element Plus to achieve real-time display of data
Element Plus provides a rich set of UI components that can help us achieve real-time display of data. The following is a sample code for using Element Plus to achieve real-time display of data:

1. Use the table component (Table) to display data:

<template>
  <el-table :data="tableData" stripe>
    <el-table-column prop="name" label="姓名"></el-table-column>
    <el-table-column prop="age" label="年齡"></el-table-column>
    <el-table-column prop="gender" label="性別"></el-table-column>
  </el-table>
</template>

<script>
import { reactive } from 'vue';

export default {
  setup() {
    const tableData = reactive([
      { name: '張三', age: 28, gender: '男' },
      { name: '李四', age: 32, gender: '女' },
      { name: '王五', age: 25, gender: '男' }
    ]);

    return {
      tableData
    };
  }
};
</script>

In the above code, we use The Table component of Element Plus displays a data list containing name, age, and gender information. By using the reactive function, we turn the data list into responsive data. When the data changes, the table content will automatically update.

2. Use the chart component (Charts) to display data:

<template>
  <el-chart :data="chartData" type="line" x-axis-field="time" y-axis-text="數(shù)量" width="400" height="300"></el-chart>
</template>

<script>
import { reactive } from 'vue';

export default {
  setup() {
    const chartData = reactive([
      { time: '2022-01-01', count: 10 },
      { time: '2022-01-02', count: 20 },
      { time: '2022-01-03', count: 15 }
    ]);

    return {
      chartData
    };
  }
};
</script>

In the above code, we use the chart component (Charts) of Element Plus to display a graph containing time and Line chart of quantity information. By using the reactive function, we turn the data into responsive data. When the data changes, the chart content will automatically update.

Conclusion:
Through Vue and Element Plus, we can easily realize the functions of real-time updating and real-time display of data. In actual development, we can choose appropriate methods and components according to needs to implement the corresponding functions. I hope this article is helpful to you, thank you for reading!

Note: The Element Plus version in the above code example is v1.0.2, and the Vue version is v3.0.11. Please ensure that the corresponding dependent libraries have been installed before use.

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