search
HomeWeb Front-endHTML Tutorial前端js和css的压缩合并之nodejs_html/css_WEB-ITnose

From: http://www.cnblogs.com/starweb/archive/2013/01/24/2874838.html

1.安装nodejs

http://nodejs.org/

2.安装各自的node package

js我用的是UglifyJS github地址: https://github.com/mishoo/UglifyJS

css我用的是clean-css github地址: https://github.com/GoalSmashers/clean-css

图片用的是node-smushit    github地址: https://github.com/colorhook/node-smushit

3.编写代码

//js

var  fs = require( 'fs' );

var  jsp = require( "uglify-js" ).parser;

var  pro = require( "uglify-js" ).uglify;

function  jsMinifier(flieIn, fileOut) {

    var  flieIn=Array.isArray(flieIn)? flieIn : [flieIn];

    var  origCode,ast,finalCode= '' ;

    for ( var  i=0; i

     origCode = fs.readFileSync(flieIn[i], 'utf8' );

     ast = jsp.parse(origCode);

     ast = pro.ast_mangle(ast);

     ast= pro.ast_squeeze(ast);

     finalCode += ';' + pro.gen_code(ast);

    }

   fs.writeFileSync(fileOut, finalCode, 'utf8' );

} //jsMinifier('./file-src/test2.js', './file-smin/test-min.js');  //单个文件压缩

jsMinifier([ './file-src/test.js' , './file-src/test2.js' ], './file-smin/test-min.js' ); //合并压缩

命令翻译

UglifyJS使用

uglifyjs [  选项... ] [  文件 ]

文件参数应该放在选项后面,uglifyjs 会读取文件中的javascript代码进行处理。如果你不指定输出的文件名,那么他会把处理后的内容输出到命令行中。

支持的选项 :

●   -b 或 –beautify - 输出格式化代码,当传入该参数,下面的附加选项用于更美观的控制格式化:

●   -i N 或 –indent N - 缩进级别(空格数量)

●   -q 或 –quote-keys - 是否用引号引起字符串对象的键(默认只会引起不能被正确标志的键名)

●   –ascii -默认 UglifyJS 不处理字符编码而直接输出 Unicode 字符,通过传入该参数将非ASCII编码的字符转化为\cXXXX的序列(输出总按照UTF8编码,但传入该选项能得到ASCII编码的输出)。

●   -nm 或 –no-mangle - 不改变变量名称

●   -ns 或 –no-squeeze - 不调用 ast_squeeze() 函数(该函数会做多种优化使得结果更小,可读性略有降低)

●   -mt 或 –mangle-toplevel - 在顶级作用域打乱变量名称(默认不开启)

●   –no-seqs - 当调用 ast_squeeze() 将会合并多个语句块为一个语句块,如 ”a=10; b=20; foo()” 将被转换为 ”a=10,b=20,foo()”

●   –no-dead-code - 默认 UglifyJS 将会删除不被用到的代码,传入该参数禁用此功能。

●   -nc 或 –no-copyright - 默认 uglifyjs 会在输出后的代码中添加版权信息等注释代码,传入该参数禁用此功能。

●   -o 文件名 或 –output 文件名 - 指定输出文件名,如果不指定,则打印到标准输出(STDOUT)

●   –overwrite - 如果传入的JS代码来自文件而不是标准输入,传入该参数,输出会覆盖该文件。

●   –ast - 传入该参数会得到抽象的语法树而不是Javascript,对调试或了解内部代码很有用。

●   -v 或 –verbose - 在标准错误输出一些信息(目前的版本仅输出操作用时)

●   –extra - 开启附加优化,这些优化并未得到全面的测试。

●   –unsafe - 开启其他附加优化,这些优化已知在特定情况下并不安全,目前仅支持:

●   foo.toString() ==> foo+””

●   –max-line-len (默认32K字节) - 在32K字节出增加换行符,传入0禁用此功能。

●   –reserved-names - 一些类库会依赖一些变量,该参数指定的名称不会被混淆掉,多个用逗号隔开

//css

var  cleanCSS = require( 'clean-css' );

function  cssMinifier(flieIn, fileOut) {

    var  flieIn=Array.isArray(flieIn)? flieIn : [flieIn];

    var  origCode,finalCode= '' ;

    for ( var  i=0; i

     origCode = fs.readFileSync(flieIn[i], 'utf8' );

     finalCode += cleanCSS.process(origCode);

    }

   fs.writeFileSync(fileOut, finalCode, 'utf8' );

}

  

//cssMinifier('./file-src/indexw_20120913.css', './file-smin/index.css');  //单个文件压缩

cssMinifier([ './file-src/index_20120913.css' , './file-src/indexw_20120913.css' ], './file-smin/index.css' );

//图片

var  imgMinifier = require( 'node-smushit' );

//imgMinifier.smushit('./file-src/images', {recursive: true}); //递归

imgMinifier.smushit( './file-src/images' );

+

+

+

=

+

+

+

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
What is the difference between an HTML tag and an HTML attribute?What is the difference between an HTML tag and an HTML attribute?May 14, 2025 am 12:01 AM

HTMLtagsdefinethestructureofawebpage,whileattributesaddfunctionalityanddetails.1)Tagslike,,andoutlinethecontent'splacement.2)Attributessuchassrc,class,andstyleenhancetagsbyspecifyingimagesources,styling,andmore,improvingfunctionalityandappearance.

The Future of HTML: Evolution and TrendsThe Future of HTML: Evolution and TrendsMay 13, 2025 am 12:01 AM

The future of HTML will develop in a more semantic, functional and modular direction. 1) Semanticization will make the tag describe the content more clearly, improving SEO and barrier-free access. 2) Functionalization will introduce new elements and attributes to meet user needs. 3) Modularity will support component development and improve code reusability.

Why are HTML attributes important for web development?Why are HTML attributes important for web development?May 12, 2025 am 12:01 AM

HTMLattributesarecrucialinwebdevelopmentforcontrollingbehavior,appearance,andfunctionality.Theyenhanceinteractivity,accessibility,andSEO.Forexample,thesrcattributeintagsimpactsSEO,whileonclickintagsaddsinteractivity.Touseattributeseffectively:1)Usese

What is the purpose of the alt attribute? Why is it important?What is the purpose of the alt attribute? Why is it important?May 11, 2025 am 12:01 AM

The alt attribute is an important part of the tag in HTML and is used to provide alternative text for images. 1. When the image cannot be loaded, the text in the alt attribute will be displayed to improve the user experience. 2. Screen readers use the alt attribute to help visually impaired users understand the content of the picture. 3. Search engines index text in the alt attribute to improve the SEO ranking of web pages.

HTML, CSS, and JavaScript: Examples and Practical ApplicationsHTML, CSS, and JavaScript: Examples and Practical ApplicationsMay 09, 2025 am 12:01 AM

The roles of HTML, CSS and JavaScript in web development are: 1. HTML is used to build web page structure; 2. CSS is used to beautify the appearance of web pages; 3. JavaScript is used to achieve dynamic interaction. Through tags, styles and scripts, these three together build the core functions of modern web pages.

How do you set the lang attribute on the  tag? Why is this important?How do you set the lang attribute on the tag? Why is this important?May 08, 2025 am 12:03 AM

Setting the lang attributes of a tag is a key step in optimizing web accessibility and SEO. 1) Set the lang attribute in the tag, such as. 2) In multilingual content, set lang attributes for different language parts, such as. 3) Use language codes that comply with ISO639-1 standards, such as "en", "fr", "zh", etc. Correctly setting the lang attribute can improve the accessibility of web pages and search engine rankings.

What is the purpose of HTML attributes?What is the purpose of HTML attributes?May 07, 2025 am 12:01 AM

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

How do you create a list in HTML?How do you create a list in HTML?May 06, 2025 am 12:01 AM

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools