How to use Vue and Element Plus to achieve real-time updates and real-time display

Introduction:
Vue is a front-end framework that provides real-time response and data binding features, allowing us to quickly build interactions style user interface. Element Plus is a component library based on Vue 3, which provides a rich set of UI components to make it easier for developers to build applications.

In many scenarios, we need to implement real-time update and real-time display functions, such as chat applications, real-time data display, etc. This article will introduce in detail how to use Vue and Element Plus to achieve such functionality, while giving some code examples.

1. Update data in real time
In Vue, we can achieve the effect of updating data in real time by binding data and using calculated properties. The following is a simple code example:

<template>
  <div>
    <input v-model="message" placeholder="請(qǐng)輸入消息" />
    <button @click="sendMessage">發(fā)送</button>
    <ul>
      <li v-for="msg in messages" :key="msg.id">
        {{ msg.text }}
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      message: '',
      messages: [
        { id: 1, text: '消息1' },
        { id: 2, text: '消息2' },
        { id: 3, text: '消息3' }
      ]
    }
  },
  methods: {
    sendMessage() {
      if (this.message) {
        this.messages.push({ id: Date.now(), text: this.message })
        this.message = ''
      }
    }
  }
}
</script>

In the above code, we use v-model to bind the value of an input box. When the user enters information, click the send button to add the information to messages in the array. Because messages is responsive data, Vue will automatically update the view to achieve real-time update effects.

2. Real-time display of data
Real-time display of data can be achieved by using components provided by Element Plus, such as dialog boxes, pop-up prompts, etc. The following is an example of using the dialog component to display data in real time:

<template>
  <div>
    <el-button @click="showDialog">顯示對(duì)話框</el-button>
    <el-dialog v-model="dialogVisible" title="消息對(duì)話框">
      <ul>
        <li v-for="msg in messages" :key="msg.id">
          {{ msg.text }}
        </li>
      </ul>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      messages: [
        { id: 1, text: '消息1' },
        { id: 2, text: '消息2' },
        { id: 3, text: '消息3' }
      ],
      dialogVisible: false
    }
  },
  methods: {
    showDialog() {
      this.dialogVisible = true
    }
  }
}
</script>

In the above code, we display the dialog box by clicking the button, and the content inside the dialog box is rendered in a loop using the v-for instruction. . When the button is clicked, set the value of dialogVisible to true, the dialog box will be displayed, and Vue will update the view.

3. Use the real-time update component provided by Element Plus
In addition to the custom code in the above example, Element Plus also provides some components for real-time update of data, which can more conveniently realize real-time display and real-time update. Function. For example, the el-tooltip component can display real-time updated data when the mouse is hovered, and the el-progress component can display changes in the progress bar in real time, etc.

The following is a simple example of using the el-tooltip component to display data in real time:

<template>
  <div>
    <ul>
      <li v-for="msg in messages" :key="msg.id">
        {{ msg.text }}
        <el-tooltip :content="msg.updatedAt" placement="top" effect="dark"></el-tooltip>
      </li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      messages: [
        { id: 1, text: '消息1', updatedAt: '2021-01-01 10:00:00' },
        { id: 2, text: '消息2', updatedAt: '2021-01-01 10:01:00' },
        { id: 3, text: '消息3', updatedAt: '2021-01-01 10:02:00' }
      ]
    }
  }
}
</script>

In the above code, we used el-tooltip Component to display the update time of the message. When the mouse hovers over a message, the update time of the corresponding message will be displayed, achieving a real-time display effect.

Conclusion:
This article introduces how to use Vue and Element Plus to achieve real-time update and real-time display functions. Through code examples, it demonstrates the use of Vue's data binding and computed properties, as well as the use of components provided by Element Plus to achieve such functionality. I hope this article can help readers better apply Vue and Element Plus related functions during the development process.

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