How to modify the vue production environment

Vue is a popular JavaScript framework for building modern web applications. In Vue's development environment, we can easily use the Vue CLI (command line interface) to create and develop Vue applications. Vue CLI has many useful features, one of which is allowing us to develop and deploy in Vue applications. In this article, we will take a closer look at how to make modifications in a Vue production environment.

Vue’s production environment compilation and development environment compilation are different. The biggest difference is performance.

In the development environment, when we use the Vue CLI to build a Vue application, we get a hot reload server so that we can see the updated results immediately when the code changes. This is very useful when developing and testing within Vue applications.

But when we deploy the Vue application into a production environment, we need to make some modifications to optimize its performance. Here are some ways to make modifications in a production Vue environment:

1. Load the production version of Vue into the application.

In the development environment, we use the full version of Vue for development because it contains all warnings and debugging information. However, in a production environment we do not need this information as it increases the load on the application and reduces performance. Therefore, we should use the production version of Vue.

You can use the following command in the Vue CLI to load the production version of Vue into the application:

// main.js
import Vue from 'vue'
import App from './App.vue'

Vue.config.productionTip = false // 阻止启动生产消息

new Vue({
  render: h => h(App),
}).$mount('#app')

In the above code, we set Vue.config.productionTip = false to prevent Vue from running Start a message in production mode.

2. Turn on Gzip compression

In a production environment, we should turn on Gzip compression to reduce the size of HTTP responses and speed up application loading. Gzip compression function can be configured using webpack and configured in vue.config.js.

// vue.config.js
module.exports = {
  configureWebpack: {
    plugins: [
      new CompressionWebpackPlugin({
        filename: '[path].gz[query]',
        algorithm: 'gzip',
        test: new RegExp('\.(' + productionGzipExtensions.join('|') + ')$'),
        threshold: 10240,
        minRatio: 0.8,
      }),
    ],
  },
};

In the above code, we use the CompressionWebpackPlugin plug-in to enable the Gzip compression function.

3. Remove console and debug statements

In a production environment, we should remove all console and debug statements in the application. These statements increase the size of the application and may also pose security risks. These statements can be removed from the application using UglifyJSPlugin from webpack.

// vue.config.js
module.exports = {
  configureWebpack: {
    plugins: [
      new UglifyJSPlugin({
        uglifyOptions: {
          compress: {
            drop_console: true, // 移除所有的console语句
          },
        },
      }),
    ],
  },
};

In the above code, we use the UglifyJSPlugin plug-in to delete the console statement in the application.

4. CDN acceleration of static resources

In a production environment, we should put our static resources on CDN to improve the loading speed of the application. CDN can be configured using webpack within the application.

// vue.config.js
module.exports = {
    chainWebpack: config => {
      config.plugin('html')
        .tap(args => {
          args[0].cdn = process.env.NODE_ENV === 'production' ? cdn.build : cdn.dev
          return args
        })
    }
};

In the above code, we use chainWebpack to extend webpack and use args[0].cdn to provide the URL address of the CDN.

Summary

Making modifications in the Vue production environment is to improve the performance of our application. In this article, we learned the following methods:

• Load the production version of Vue into the application.
• Enable Gzip compression.
• Remove console and debug statements.
• Accelerate static resources through CDN.

Hope these methods can help you optimize your Vue application and make it run better in a production environment.

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