How to run the "npm run build" command in vue

Vue.js is a popular JavaScript framework that is a progressive framework developed based on the MVVM pattern. When developing Vue.js applications, we often need to package the code into a build version for easy deployment to a production environment. At this time, we need to run the npm run build command to execute the build.

So, let’s take a look at the specific usage of the npm run build command in Vue.js.

1. Introduction

In Vue.js, we use a modern front-end tool chain to build projects. Among them, the two most important tools are npm and Webpack. Among them, npm is a JavaScript package manager that can be used to install, upgrade, and delete JavaScript packages. Webpack is a module packaging tool that can package all modules in the application into one or more files for easy use in the browser.

npm run build command is used to package the application. It will package your Vue.js project into one or more files, including HTML, CSS, JavaScript and other files . After the build is complete, you can deploy these files to the server for use.

2. How to run the npm run build command

Vue.js projects are usually built using Vue CLI, so we need to install it first Vue CLI:

$ npm install -g @vue/cli

After the installation is complete, we can use Vue CLI to create a new Vue.js project:

$ vue create my-project

Next, We enter the root directory of the project and use the following command to run npm run build:

$ npm run build

After running this command, Webpack will automatically package the application code of the generated environment and output the file Go to the /dist directory.

3. The detailed process of running the npm run build command

When we enter the npm run build command, Webpack will run it according to the # in the project ##webpack.config.js file configuration to package our application code. In Vue.js, the webpack.config.js file is usually placed in the root directory of the project.

The Webpack packaging process mainly includes the following steps:

Load the entry file: Webpack reads the entry file according to the
1. entry entry set in the configuration file. .
Analyze dependencies: Webpack analyzes all the files that the entry file depends on, including CSS, JavaScript, HTML and other files, and packages them into one or more files.
2. Processing code: Webpack converts all JavaScript code into browser executable code, such as ES6, TypeScript, CoffeeScript, etc.
3. Compress code: Webpack compresses and obfuscates the code to reduce file size.
4. Output file: Finally, Webpack outputs the processed code to the
5. /dist directory.

After the

npm run build command is executed, we can open the /dist directory to view the generated files.

4. Summary

In Vue.js, we use the

npm run build command to generate application code for deployment to the production environment. This command uses a modern front-end tool chain to generate packaging code, making our work more efficient and convenient.

At the same time, it is worth noting that during the actual development process, we usually need to make some customized settings for the

npm run build command, such as modifying the name of the packaged file and adding version information wait. This requires you to have a certain understanding of Webpack configuration files in order to make further personalized settings.

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