Webpack 4.x 默认支持 ES6 语法

Webpack 4.x 默认支持 ES6 语法

Q: 为什么 webpack4 默认支持 ES6 语法的压缩?

A: terser 里面实现了 ES6 语法的 AST解析.

1. webpack 4 里使用了 terser-webpack-plugin 插件, 替代原来 webpack 使用的 uglifyjs-webpack-plugin 插件，作为它的内置插件;

Switch from uglifyjs-webpack-plugin to terser-webpack-plugin, Nov 19, 2018

https://github.com/webpack/webpack/tree/311a7285d36b38bada46102967c431e93ff48a89

webpack dependency graph

webpack 模块依赖图

terser-webpack-plugin

https://github.com/webpack-contrib/terser-webpack-plugin

https://github.com/webpack/webpack/tree/311a7285d36b38bada46102967c431e93ff48a89

refs

https://github.com/cpselvis/geektime-webpack-course/issues/4

https://npm.broofa.com/?q=webpack

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