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RequireJS模块化后JS压缩合并

时间:2016-08-24 19:10:51      阅读:237      评论:0      收藏:0      [点我收藏+]

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使用RequireJS模块化后代码被拆分成多个JS文件了,在部署生产环境需要压缩合并,RequireJS提供了一个打包压缩工具r.js来对模块进行合并压缩。r.js非常强大,不但可以压缩js,css,甚至可以对整个项目进行打包。

r.js的压缩工具使用UglifyJSClosure Compiler。默认使用UglifyJS(jQuery也是使用它压缩)。此外r.js需要node.js环境,当然它也可以运行在Java环境中如Rhino。JAVA环境使用Ant构建可以参考另外一篇RequireJS optimizer Ant task有介绍。node环境参考RequireJS模块化与GruntJS构建

本篇介绍require.js官方文档中介绍的方法。

build.xml

{
    appDir: ‘../www‘,
    baseUrl: ‘js/lib‘,
    paths: {
        app: ‘../app‘
    },
    dir: ‘../www-built‘,
    modules: [
        //First set up the common build layer.
        {
            //module names are relative to baseUrl
            name: ‘../common‘,
            //List common dependencies here. Only need to list
            //top level dependencies, "include" will find
            //nested dependencies.
            include: [‘jquery‘,
                      ‘app/lib‘,
                      ‘app/controller/Base‘,
                      ‘app/model/Base‘
            ]
        },
 
        //Now set up a build layer for each page, but exclude
        //the common one. "exclude" will exclude nested
        //the nested, built dependencies from "common". Any
        //"exclude" that includes built modules should be
        //listed before the build layer that wants to exclude it.
        //"include" the appropriate "app/main*" module since by default
        //it will not get added to the build since it is loaded by a nested
        //require in the page*.js files.
        {
            //module names are relative to baseUrl/paths config
            name: ‘../page1‘,
            include: [‘app/main1‘],
            exclude: [‘../common‘]
        },
 
        {
            //module names are relative to baseUrl
            name: ‘../page2‘,
            include: [‘app/main2‘],
            exclude: [‘../common‘]
        }
 
    ]
}

在node环境下执行 node r.js -o build.js 就可以压缩合并模块。

项目参考https://github.com/requirejs/example-multipage/blob/master/tools/build.js

RequireJS模块化后JS压缩合并

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原文地址:http://www.cnblogs.com/wyaocn/p/5804233.html

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