How to correctly introduce static jQuery into Vue to avoid errors

Introducing static jQuery into Vue and avoiding errors is a common problem, especially when jQuery needs to be used in Vue components. The correct introduction method can help us avoid various problems. Let us explain the correct introduction method and specific code examples in detail.

Why we need to introduce static jQuery

During the development process, we may need to use jQuery to complete some functions, such as operating DOM elements, handling events, sending AJAX requests, etc. Although Vue itself has provided many modern features and methods, sometimes you still need to use jQuery to conveniently manipulate DOM elements and implement other functions.

Wrong introduction method

In Vue, if you directly pass import $ from 'jquery' or const $ = require('jquery')Introducing jQuery in this way may cause errors or various problems. This is because Vue uses a modular approach to development, while jQuery is a traditional global variable, and the introduction methods between the two are incompatible.

Correct introduction method

In order to correctly introduce static jQuery into Vue and avoid errors, we can do it through the following steps:

1. In public/index.htmlIntroduce the CDN link of jQuery in the file:

   <script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.min.js"></script>

2. Use the mounted life cycle hook in the Vue component to ensure that jQuery Already loaded:

   export default {
       mounted() {
           if (window.jQuery) {
               this.$jQuery = window.jQuery;
           } else {
               console.error('jQuery is not loaded.');
           }
       }
   }

3. Where jQuery needs to be used, call the jQuery method through this.$jQuery:

   this.$jQuery('.element').hide();

Complete code example

Let us look at a complete Vue component to demonstrate how to correctly introduce static jQuery and use it:

<template>
  <div>
    <button @click="hideElement">Hide Element</button>
    <div class="element">Hello, World!</div>
  </div>
</template>

<script>
export default {
  mounted() {
    if (window.jQuery) {
      this.$jQuery = window.jQuery;
    } else {
      console.error('jQuery is not loaded.');
    }
  },
  methods: {
    hideElement() {
      this.$jQuery('.element').hide();
    }
  }
}
</script>

Through the above method, we can use Vue Correctly introduce static jQuery and avoid reporting errors. In this way, where we need to use jQuery, we can easily call jQuery methods to implement various functions. Hope the above content is helpful to you!

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