今天node.js发布了v4.0.0,兴高采烈地升了级,跑koa的时候再也不用node --harmony了,真是nice啊。
下午同事提了个css sprite的需求,要求写的时候是引用小图,发布的时候用工具合成大图,减少合并的工作量。fis3能做这个,果断用起。
npm install fis3 -g
fis3 release -d ./dist
duang!!!有警告,csssprite这个模块不支持最新版的node.js。
没关系,换个版本继续搞起,然后就ok了。
对比生成的图片和样式文件,图片合并了,样式文件也替换了,挺nice的。
我天真地以为事情到这就完了,过了一会发现项目跑不起来,文件引用变成了绝对路径。
对比文件发现fis3把background:url(../images)都替换成了background:url(/images),就是fis团队说的三种语言中的资源定位。
但是我要的只是雪碧图的功能啊,fis那一整套的解决方案我不需要,把路径都给替换了还怎么玩。
翻了fis3的api,没发现有去掉这个替换功能的,扒了源码也没发现有相关配置项。
想自己用gulp写个,把这功能抄过来。仔细看了源码,发现这模块深度依赖fis,还针对图片位置做了性能优化,好麻烦。
折腾了一番,决定对这流程再包装一次。
还是用fis3来生成雪碧图,完了gulp跑一遍,把css路径给改回来,顺便把css和雪碧图文件挪个位置,再把fis3生成的目录删了。
代码大致像这个样子:
gulp.task('sprite',function(){ return shell.task('fis3 release -d ./dist')();});gulp.task('replace',function(){ return gulp.src(['./dist/css/**/*']) .pipe(through.obj(function(file,enc,cb){ replaceImageUrl(); this.push(file); cb(); })) .pipe(gulp.dest('./css/'))});gulp.task('default',function(){ return sequence( 'sprite', 'replace', 'clean' )();})
折腾了一下午,记录一下。

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HTML, CSS and JavaScript are the three pillars of web development. 1. HTML defines the web page structure and uses tags such as, etc. 2. CSS controls the web page style, using selectors and attributes such as color, font-size, etc. 3. JavaScript realizes dynamic effects and interaction, through event monitoring and DOM operations.

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