入门

安装 (for NodeJS)

You can install UglifyJS from NPM:

npm install uglify-js

but you can also use the Git repository if you feel adventurous:

git clone git://github.com/mishoo/UglifyJS2.git
cd UglifyJS2
npm link

为浏览器构建

Once you installed it for NodeJS, UglifyJS2 provides a quick way to build itself for the browser:

uglifyjs --self -c -m -o /tmp/uglifyjs.js

Now you have it in /tmp/uglifyjs.js and can include that single file in a browser. If you need source maps you'll also have to include the Mozilla source-map module. details to be clarified

输出接口

UglifyJS is written in “classic style”, so to say — it's not using the CommonJS module system (I find it more of an annoyance than of real help, especially for prototyping/development). To load it in NodeJS there's a single file that needs to be require-d: tools/node.js. If you installed it with npm install or npm link as mentioned above, then this file is loaded when you say var UglifyJS = require("uglify-js2"). This single file will load all the others in a separate execution context, so you should not worry about messing your global environment, and it returns a single object where all the global definitions in UglifyJS are exported.

统计

Here are some stats showing where UglifyJS2 stands compared to other minifiers. Show charts.