The el-upload component of Element-Plus in Vue3 is implemented to limit the upload of only one file.

Element-Plus is a Vue 3-based component library, where the el-upload component provides convenient file uploading functions. By default, the el-upload component allows multiple file uploads, but we can limit uploading only one file by setting properties and listening events.

Here are the steps to implement this function:

1. Introduce Element-Plus component library and styles

First, make sure that the Element-Plus component library is installed and the desired style files are imported.

npm install element-plus

import { createApp } from 'vue';
import ElementPlus from 'element-plus';
import 'element-plus/lib/theme-chalk/';

const app = createApp(App);
(ElementPlus);
('#app');

2. Configure the el-upload component

Use the el-upload component in the Vue template and set the property limit="1" to limit only one file upload.
The code is as follows (example):

<template>
  <el-upload
    class="upload-demo"
    :action="uploadUrl"
    :limit="1"
    :before-upload="handleBeforeUpload"
    :on-success="handleSuccess"
  >
    <el-button size="small" type="primary">Click to upload</el-button>
  </el-upload>
</template>

<script>
export default {
  data() {
    return {
      uploadUrl: '/your-upload-url',
    };
  },
  methods: {
    handleBeforeUpload(file) {
      // If there are already files uploads, prevent other files from being uploaded      if (this.$ > 0) {
        this.$('Only one file can be uploaded');
        return false;
      }
      // Other custom logic    },
    handleSuccess(response, file) {
      // Handle callbacks that have been uploaded successfully    },
  },
};
</script>

<style>
.upload-demo {
  margin-top: 20px;
}
</style>

In the above code, we limit the el-upload component to only upload one file by setting limit="1". In the before-upload method, we check the number of files currently uploaded. If it is greater than 0, we will prevent other files from being uploaded and give corresponding prompts.

Through the above configuration, the el-upload component can achieve the function of limiting only one file upload. You can customize other upload logic and styles according to your needs.

Summarize

By configuring the el-upload component of Element-Plus, we can easily implement the ability to limit only one file upload in Vue 3. I hope this article will be helpful to your development work.

This is the article about the implementation of the function of using Element-Plus' el-upload component in Vue3 to restrict uploading only one file. For more related Vue3 el-upload restricting uploading file content, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!