How to solve the error when introducing jQuery static resources into Vue

Solution to errors when introducing static jQuery into Vue

Introducing static jQuery into a Vue project is a common requirement, but sometimes it will occur during the introduction process Some errors prevent the project from running properly. This article describes a solution and provides specific code examples.

Problem background:
In Vue projects, we usually use npm or yarn to manage and introduce third-party plug-ins and libraries. But if we need to introduce static jQuery, sometimes we will encounter some problems, such as $ is not defined, the jQuery plug-in cannot be used normally, etc. This is because Vue's single-file component limits the global variables introduced by jQuery to the current file and cannot be accessed by other files.

Solution:
In order to solve this problem, we can introduce static jQuery in the form of a Vue plug-in so that it can be accessed by the entire project. The following are the specific steps and code examples:

1. Create a file named jqueryPlugin.js to encapsulate jQuery and expose it to Vue

   import jQuery from 'jquery'
   
   const jQueryPlugin = {}
   
   jQueryPlugin.install = function (Vue) {
     Vue.prototype.$jQuery = jQuery
     Vue.$jQuery = jQuery
   }
   
   export default jQueryPlugin

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2. Introduce and use this plug-in in main.js

   import Vue from 'vue'
   import App from './App.vue'
   import jQueryPlugin from './plugins/jqueryPlugin'
   
   Vue.use(jQueryPlugin)
   
   new Vue({
     render: h => h(App)
   }).$mount('#app')

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3. In components that need to use jQuery, you can directly use this.$jQuery or Vue.$jQuery to access the jQuery object

   export default {
     mounted() {
    this.$jQuery('#example').text('Hello, jQuery!')
     }
   }

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Through the above steps, we successfully introduced static jQuery into the Vue project and enabled it to be accessed and used normally in various components, avoiding $undefined, etc. mistake.

Summary:
Introducing static jQuery into the Vue project may encounter some problems, but by encapsulating jQuery as a plug-in, we can easily solve these problems and make jQuery available throughout the project. It can be used normally in the project. I hope the solutions and code examples in this article will be helpful to developers who encounter similar problems.

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