Analysis of usage of import and require in Vue

Analysis of usage of import and require in front-end Vue

In front-end development, it is very common to use the Vue framework for project development. In Vue projects, we often need to introduce external modules or files, and we will use them at this time.importandrequireThese two keywords. This article will analyze their usage in detail and provide specific code examples and explanations.

importUsage

In ES6,importis a syntax for importing modules. It can help us introduce other JavaScript modules for use in the current module. Here is an example:

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

In the above code, we use the import statement to import the Vue module and a component named App into the current module. In this way, we can use the functions of Vue and App components in the current module.

It should be noted that the import statement is ES6 syntax and may not be supported in some old browsers. In order for the code to work properly in an environment that does not support import, we need to convert it to ES5 syntax using tools such as Babel.

requireUsage

In an environment, require is a syntax for loading modules. It can help us introduce other JavaScript modules or files for use in the current module. Here is an example:

const Vue = require('vue');
const App = require('./');
new Vue({
  render: (h) => h(App)
}).$mount('#app');

In the above code, we use the require statement to import the Vue module and a component named App into the current module. We can then use the functions of Vue and App components in the current module.

It should be noted that the require statement is syntax, it is not the standard JavaScript syntax, so it cannot be used directly in the browser environment. If we want to use the require syntax in our browser, we can use a packaging tool such as Webpack to convert it into a browser-recognizable code.

summary

importIt is a keyword used to import modules in ES6 syntax, and is suitable for modern browser environments.

requireIt is a keyword used in the syntax to load modules and is suitable for the environment.

importandrequireAll can help us introduce other modules or files for use in the current module.

According to the environment in which the project is located and the framework used, select appropriate keywords to import the module to ensure the correct operation of the code.

This is the end of this article about the analysis of the usage of import and require in Vue. For more information about the usage of Vue import and require, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!