How to use Vue and Element-UI to implement auto-completion function

How to use Vue and Element-UI to implement auto-completion function

Overview:
Auto-completion is a very practical function that can provide relevant completion options based on user input. Improve user experience. In the Vue framework, combined with the Element-UI component library, it becomes very simple to implement the automatic completion function. This article will introduce how to use Vue and Element-UI to implement this function, and give corresponding code examples.

Step 1: Create a Vue project and introduce the Element-UI library
First, we need to create a Vue project and introduce the Element-UI library into the project. You can use Vue CLI to quickly create a project. The specific operations are as follows:

1. Open the command line tool, enter the project directory, and execute the following command to install Vue CLI:

   npm install -g @vue/cli

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2. Create a new Vue project:

   vue create autocomplete-demo

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3. Enter the project directory:

   cd autocomplete-demo

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4. Install Element-UI:

   npm install element-ui

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5. Introduce Element-UI styles and components into the main.js file:

   import Vue from 'vue'
   import ElementUI from 'element-ui'
   import 'element-ui/lib/theme-chalk/index.css'
   
   Vue.use(ElementUI)

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Step 2: Implement the automatic completion function
Next , we will implement the auto-completion function in the Vue component. Suppose we need to implement automatic completion in an input box. When the user enters content in the input box, the system will provide corresponding completion options based on the user's input.

1. In the template of the Vue component, add an input box and a drop-down list:

   <template>
     <div>
    <el-input v-model="inputValue" @input="handleSearch" placeholder="请输入内容"></el-input>
    <el-select v-model="selectedValue" filterable placeholder="请选择">
      <el-option v-for="option in options" :key="option.value" :label="option.label" :value="option.value"></el-option>
    </el-select>
     </div>
   </template>

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2. In the data of the Vue component, define the input The value of the box, the selected value and the completion options:

   data() {
     return {
    inputValue: '',
    selectedValue: '',
    options: []
     }
   }

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3. In the methods of the Vue component, define the method for processing input changes:

   methods: {
     handleSearch(query) {
    // 模拟异步请求补全选项的过程，可以根据实际情况替换成真实的请求
    setTimeout(() => {
      // 根据输入的内容过滤补全选项
      const filteredOptions = this.options.filter(option => option.label.indexOf(query) !== -1)
      this.options = filteredOptions
    }, 300)
     }
   }

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4. In the mounted hook of the Vue component, initialize the completion options:

   mounted() {
     // 初始化补全选项，可以根据实际情况进行设置
     this.options = [
    { value: '1', label: '选项一' },
    { value: '2', label: '选项二' },
    { value: '3', label: '选项三' },
    { value: '4', label: '选项四' }
     ]
   }

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So far, we have completed the code for using Vue and Element-UI to implement the automatic completion function write. After running the project and opening the page, we can enter content in the input box, and the system will provide corresponding completion options based on the entered content.

Summary:
This article introduces how to use Vue and Element-UI to implement the automatic completion function, and gives corresponding code examples. Through the above steps, we can easily integrate the auto-completion function in the Vue project to improve the user's interactive experience. Hope this article will be helpful to you.

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