How to perform anti-shake in vue

Anti-shake is a common optimization method in Vue projects. It can prevent users from frequently triggering functions, reduce meaningless requests, reduce server pressure, and make the user experience smoother. This article will introduce how Vue performs anti-shake.

1. Understand the anti-shake mechanism

Anti-shake is an optimization technology that can limit the number of executions of frequent events, that is, execute the function after the event is triggered for a specified time. If the event is triggered again within the specified time, the timing will be restarted. The process of restarting timing is called "jittering". In the Vue project, we can debounce by using the debounce method provided by Lodash.

2. Install Lodash

Before using Lodash’s debounce method, you need to install Lodash first. Use npm to install Lodash in the Vue project and execute the following command:

npm install --save lodash

3. Use the debounce method of Lodash

After installing Lodash, you can use the debounce method for anti-shake . Taking Vue's methods as an example, the code is as follows:

methods: {
  handleClick: _.debounce(function () {
    // 函数执行内容
  }, 500)
}

In the above code, we use the _.debounce method to create a new function and assign it to the handleClick function. The second parameter "500" of the debounce method represents the anti-shake waiting time, in milliseconds. When the handleClick function is triggered, the debounce method will wait for 500 milliseconds before executing. If another handleClick event is triggered within 500 milliseconds, the debounce method restarts timing.

4. Application of anti-shake in form input

In Vue projects, form input events often need to use anti-shake. Take a search box as an example. When a user enters a keyword in the search box, we want to request data immediately after the user enters it. However, users tend to enter frequently, so anti-shake is needed. The code is as follows:

<template>
  <div>
    <input type="text" v-model="keyword" @input="handleInputChange"/>
  </div>
</template>

<script>
  import _ from 'lodash'
  
  export default {
    data() {
      return {
        keyword: ''
      }
    },
    methods: {
      handleInputChange: _.debounce(function () {
        this.getData()
      }, 500),
      getData() {
        // 数据请求
      }
    }
  }
</script>

In the above code, we used anti-shake in the handleInputChange function, waited for 500 milliseconds and then called the getData function to request data. When the user is typing, the debounce method will always be timing. If another input event is triggered within 500 milliseconds, the timing will be restarted. This method can avoid meaningless requests when users enter frequently.

5. Summary

Anti-shake in Vue projects is a very useful and common optimization technique, which can reduce meaningless requests and make the user experience smoother . Anti-shake can be easily achieved using the debounce method provided by Lodash. In some scenarios that require user input, anti-shake can also avoid meaningless requests when users frequently input.

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