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关于网站性能的深入研究_html/css_WEB-ITnose

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Jun 24, 2016 am 11:16 AM

网页自动化测试工具iMacros试用下载

1、基本网络优化

CSS和JS的串联和压缩：

文件串联： grunt-contrib-concat 或gulp-concat
JavaScript的压缩/缩小： grunt-contrib-uglify 或gulp-uglify
CSS压缩： grunt-contrib-cssmin 或gulp-cssmin

图像无损压缩：

工作流插件： grunt-contrib-imagemin 或gulp-imagemin
Mac桌面应用程序： ImageOptim
web应用程序： TinyPNG

利用浏览器缓存：对static assets设置合适的缓存时间，大大提高加载页面的速度。

启用gzip压缩设置：如果您的服务器和客户端支持gzip压缩，，可以节约90%的响应时间。

2.浏览器兼容性快速修复

怎样很好的支持旧版本的浏览器？这里有一些开源的解决方案，可以解决一些常见的旧版本浏览器问题。

Selectivizr ：IE9以下的版本对CSS3的支持有限，因此大多数的新版CSS selectors不可以没有polyfill。
Respond.js ：IE8以下的版本不支持CSS媒体查询。在样式表加载之后加载这个，长期忍受IE这一缺点的用户会感激你的。
Webshim : 传统的浏览器polyfill library允许开发人员动态地为常用HTML5功能加载polyfill，包括form、geolocation和Canvas。

3.快速修复收集和平板

这里有几个很棒的开源JS项目，有助于提升您的移动应用程序的性能。

FastClick ：消除用户点击屏幕之后事件触发的时间延迟。尤其适用于ios，而Android版Chrome可以使用user-scalable=no来消除，IE11+可以使用touch-action: manipulation，移动Safari浏览器目前还没有这样的设置。
Offline ：当处于脱机状态时通知您的用户，并在重新上线之后存储用户的行为。

4.JavaScript的模块捆绑和软件包管理

使用bundler组织您的客户端代码，例如Webpack、Browserify、RequireJS或JSPM with System.js。尤其当您依赖很多第三方时，在非捆绑本地开发模式和生产开发模式下都可以运行。

Bundlers可以减少JS请求blocking、压缩代码，并只加载目前正在页面上使用的脚本。

5. usemin

Usemin作为工作流程的一部分介绍，自动替换参考模板中没有进行优化的设置。usemin可以轻松整合串联、压缩和文件提速。

原文翻译自： dzone

转载请注明： evget

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