jQuery 1.11 和 2.1 Beta 1 发布

jQuery 1.11 和 2.1 Beta1 发布了，获取地址：

• http://code.jquery.com/jquery-1.11.0-beta1.js
• http://code.jquery.com/jquery-2.1.0-beta1.js

别忘了 jQuery 1.x 支持 IE 6/7/8 ，而 jQuery 2.x 不支持，值得关注的改进有：

1. 异步模块定义 AMD
2. 性能提升，降低启动时间
3. Bower support: We’re now using Bower for a lot of our internal dependency management, and plan to publish production versions of jQuery to Bower in the future.
4. Bug 修复
5. API 改动

两个版本都包含如下的改进记录：

Ajax

• #14356: Remove string indexing used in AJAX

Attributes

• #14250: addClass and removeClass needlessly assign to className.

Build

• #13983: Switch to //# for sourcemap directives
• #14113: AMD-ify jQuery source
• #14118: Use bower to include Sizzle and QUnit (remove submodules)
• #14163: Make Deferreds/Callbacks/.ready() optional modules

Core

• #14164: Reduce forced layout reflows in init or methods

Css

• #14150: IE9-10 curCSS => “Interface not supported” in for popups (and probably frames)

Event

• #14282: Don’t call getPreventDefault() if there is a defaultPrevented property

Support

• #14084: elem.css(‘width’) provides incorrect output with `box-sizing: border-box` if run before document ready