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Clear the useless console.log code in the project every minute
2021-08-23 11:42:25 【Tong ouba】
Preface
Speaking of console.log
debugging , Needless to say , That's very easy to use , Development has helped us solve a lot Bug
. We can often be in development environment I saw this lump by lump console
debugging . But the production environment is absolutely not allowed console
Information code . Are you still manually deleting one by one , How tired that is !
Let's take a look at these ways to clear Production environment console
Useless code .
Basic operation
Webpack To configure
uglifyjs-webpack-plugin
uglifyjs-webpack-plugin
We can take a look at the plug-in Introduction , The plug-in is used to reduce our code js
Code volume . And if you install and run the plug-in ,node
Version is in v6.9.0+
and Webpack
edition v4.0.0+
.
See the official website address here :uglifyjs-webpack-plugin
install
npm i uglifyjs-webpack-plugin
Use
stay webpack.config.js
The following configuration is performed under file .
const UglifyJsPlugin = require('uglifyjs-webpack-plugin') module.exports = { // Omit ... mode: "production", optimization: { minimizer: [ new UglifyJsPlugin({ uglifyOptions: { // Delete Note output:{ comments: false }, compress: { drop_console: true, // Delete all modes with console Of drop_debugger: true, pure_funcs: ['console.log'] // Delete console.log } } }) ] } }
After configuring the above code , Restart to see the effect . Be careful : The code will only production( Production environment ) Effective in the environment , Look at our configuration above mode: production
, It's the production environment . Let's explain the above two properties drop_console
and pure_funcs
The difference between , The former is to delete all bands console Debugging method of prefix , Such as :console.log
、console.table
、console.dir
Just have console
All prefixes are deleted . The latter is configuration , Is what the value of the array is, it will delete what , such as pure_funcs:[console.log, console.dir]
Then only these two items will be deleted , The in the code is not deleted console.table
Code .
Put the above codes into the production environment ,console Debug code can be cleared , But there is another problem to pay attention to , That is, the plug-in only supports
ES5
grammar , If your code involvesES6
Syntax will report errors .
terser-webpack-plugin
terser-webpack-plugin
The plug-in follows the above uglifyjs-webpack-plugin
equally , Are used to reduce our code js
Code volume .
Look at the description above : If your Webpack
The version is greater than 5+, You do not need to install this terser-webpack-plugin
plug-in unit , Will bring it terser-webpack-plugin
. But yours. Webpack
Version or 4, Then you need to install terser-webpack-plugin
4 Version of
install
npm i [email protected]
Use
const TerserWebpackPlugin = require("terser-webpack-plugin"); module.exports = { // Omit ... mode: "production", optimization: { minimizer: [ new TerserWebpackPlugin({ terserOptions: { compress: { warnings: true, drop_console: true, drop_debugger: true, pure_funcs: ['console.log', "console.table"] // Delete console } } }); ] } }
The plug-in function is the same as above , The same is true for attribute usage , Only this plug-in can support ES6
grammar . It's all in Production environment Code works .
Vue-cli To configure
This is Vue-cli
Recommended cleanup in project console plug-in unit . See here for more information babel-plugin-transform-remove-console
install
npm i babel-plugin-transform-remove-console --save-dev
Use
In the project root directory babel.config.js
File configuration . The plug-in is not differentiated Production environment perhaps development environment , As long as you configure it, it will take effect .
module.exports = { plugins: [ "transform-remove-console" ] } // The production environment is configured as follows: const prodPlugins = [] if (process.env.NODE_ENV === 'production') { prodPlugins.push('transform-remove-console') } module.exports = { plugins: [ ...prodPlugins ] }
Simple and crude deletion
Next, this is an operation , Keep your eyes open , Ha ha ha . Rewrite directly console.log
Methods .
console.log = function () {};
Flexible use of VScode Editor
Wechat screenshot _20210805001715.png
Use
Direct global search in this project console.log
Regular matching , Then replace all with blank .
console\.log\(.*?\)
Handwriting Loader Delete console
Let's write a simple version of the purge console plug-in unit .
Create a new one js
file , My name here is clearConsole.js
, In fact, we also use regular to match and then replace it with empty . If you don't understand loader
You can read my article Writing a Sass-loader.
clearConsole.js
const reg = /(console.log\()(.*)(\))/g; module.exports = function(source) { source = source.replace(reg, "") return source; }
stay Vue.config.js
To configure
module.exports = { // Omit ... configureWebpack: { module: { rules: [ { test: /\.vue$/, exclude: /node_modules/, loader: path.resolve(__dirname, "./clearConsole.js") }, { test: /\.js$/, exclude: /node_modules/, loader: path.resolve(__dirname, "./clearConsole.js") } ], } }, }
Just configure the above code ~, eliminate js
Document and vue
In the file console.log
.exclude
On behalf of not going node_module
Directory lookup .
This article is from WeChat official account. - Front end canteen (webcanteen)
The source and reprint of the original text are detailed in the text , If there is any infringement , Please contact the [email protected] Delete .
Original publication time : 2021-08-11
Participation of this paper Tencent cloud media sharing plan , You are welcome to join us , share .
copyright notice
author[Tong ouba],Please bring the original link to reprint, thank you.
https://en.qdmana.com/2021/08/20210823114223219D.html
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