js框架Modernizr是什么东西

js框架Modernizr是什么东西

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.
Modernizr是一个检测用户浏览器HTML5和CSS3能力的JavaScript库。

如何工作？
Modernizr runs quickly on page load to detect features; it then creates a JavaScript object with the results, and adds classes to the htmlelement for you to key your CSS on. Modernizr supports dozens of tests, and optionally includesYepNope.js for conditional loading of external .jsand .css resources.

Modernizr在页面加载时快速运行来检测功能；之后它会创建一个保存检测结果的JavaScript对象，然后为你页面中的html标签上添加一系列class属性来接通你的CSS。Modernizr支持大量的测试和可选地包括YepNope.js来视情况加载外部的js和css资源。