jQuery 3.0 最终版发布了。jQuery 3.0将是jQuery的未来。但如果你需要IE6-8支持，您可以继续使用最新版本1.12。

为了帮助用户升级，jQuery 发布了全新的3.0升级指南，以及 jQuery Migrate 3.0 插件将帮助您识别代码中的兼容性问题。

您可以从jQuery CDN获取文件，或者直接访问链接：

• https://code.jquery.com/jquery-3.0.0.js

• https://code.jquery.com/jquery-3.0.0.min.js

您也可以从以下npm获得更新：

npm install jquery@3.0.0

此外，jQuery Migrate 3.0 也更新了。地址：

• https://code.jquery.com/jquery-migrate-3.0.0.js

• https://code.jquery.com/jquery-migrate-3.0.0.min.js

npm install jquery-migrate@3.0.0

更新日志：

Ajax

• Golf away 21 bytes (eaa3e9f)

• Preserve URL hash on requests (#1732, e077ffb)

• Execute jQuery#load callback with correct context (#3035, 5d20a3c)

• Ensure ajaxSettings.traditional is still honored (#3023, df2051c)

• Remove unnecessary use of jQuery.trim (0bd98b1)

Attributes

• Avoid infinite recursion on non-lowercase attribute getters (#3133, e06fda6)

• Add a support comment & fix a link @ tabIndex hook (9cb89bf)

• Strip/collapse whitespace for set values on selects (#2978, 7052698)

• Remove redundant parent check (b43a368)

• Fix setting selected on an option in IE<=11 (#2732, 780cac8)

CSS

• Don't workaround the IE 11 iframe-in-fullscreen sizing issues (#3041, ff1a082)

• Toggle detached elements as visible unless they have display: none (#2863, 755e7cc)

• Make sure elem.ownerDocument.defaultView is not null (#2866, 35c3148)

• Add animation-iteration-count to cssNumber (#2792, df822ca)

• Restore cascade-override behavior in .show (#2654, #2308, dba93f7)

• Stop Firefox from treating disconnected elements as cascade-hidden (#2833, fe05cf3)

Core

• Implement ready without Deferred (#1778, #1823, 5cbb234)

• Improve isNumeric logic and test coverage (#2780, 7103d8e)

• Set the base href of the context in parseHTML (#2965, 10fc590)

• Simplify isPlainObject (#2986, e0d3bfa)

• Add test for `jQuery.isPlainObject(localStorage)` (ce6c83f)

• Do not expose second argument of the `jQuery.globalEval` (6680c1b)

• Deprecate jQuery.parseJSON (#2800, 93a8fa6)

Deferred

• Separate the two paths in jQuery.when (#3029, 356a3bc)

• Provide explicit undefined context for jQuery.when raw casts (#3082, 7f1e593)

• Remove default callback context (#3060, 7608437)

• Warn on exceptions that are likely programming errors (#2736, 36a7cf9)

• Propagate progress correctly from unwrapped promises (#3062, d5dae25)

• Make jQuery.when synchronous when possible (#3100, de71e97)

• Remove undocumented progress notifications in $.when (#2710, bdf1b8f)

• Give better stack diagnostics on exceptions (07c11c0)

Dimensions

• Add tests for negative borders & paddings (f00dd0f)

Docs

• Fix various spelling errors (aae4411)

• Update support comments related to IE (693f1b5)

• Fix an incorrect comment in the attributes module (5430c54)

• Updated links to https where they are supported. (b0b280c)

• Update support comments to follow the new syntax (6072d15)

• Use https where possible (1de8346)

• Use HTTPS URLs for jsfiddle & jsbin (63a303f)

• Add FAQ to reduce noise in issues (dbdc4b7)

• Add a note about loading source with AMD (#2714, e0c25ab)

• Add note about code organization with AMD (#2750, dbc4608)

• Reference new feature guidelines and API tenets (#2320, 6054139)

Effects

• Remove width/height exception for oldIE (#2488, e04e246)

• Add tests for using jQuery.speed directly (#2716, cb80b42)

Event

• Allow constructing a jQuery.Event without a target (#3139, 2df590e)

• Add touch event properties, eliminates need for a plugin (#3104, f595808)

• Add the most commonly used pointer event properties (7d21f02)

• Remove fixHooks, propHooks; switch to ES5 getter with addProp (#3103, #1746, e61fccb)

• Make event dispatch optimizable by JavaScript engines (9f268ca)

• Evaluate delegate selectors at add time (#3071, 7fd36ea)

• Cover invalid delegation selector edge cases (e8825a5)

• Fix chaining .on() with null handlers (#2846, 17f0e26)

• Remove pageX/pageY fill for event object (#3092, 931f45f)

Events

• Don't execute native stop(Immediate)Propagation from simulation (#3111, 94efb79)

Manipulation

• Bring tagname regexes up to spec (#2005, fb9472c)

Offset

• Resolve strict mode ClientRect “no setter” exception (3befe59)

Selector

• filters -> pseudos (#2073, 0402963)

• Update Sizzle to 2.3.0 (5c4be05)

• Add jQuery.escapeSelector (#1761, 25068bf)

Serialize

• Treat literal and function-returned null/undefined the same (#3005, 9fdbdd3)

• Reduce size (91850ec)

Support

• Improve support properties computation (#3018, 44cb97e)

Tests

• Take Safari 9.1 into account (234a2d8)

• Limit selection to #qunit-fixture in attributes.js (ddb2c06)

• Set Edge's expected support for clearClone  to true (28f0329)

• Fix Deferred tests in Android 5.0's stock Chrome browser & Yandex.Browser (5c01cb1)

• Add additional test for jQuery.isPlainObject (728ea2f)

• Build: update QUnit and fix incorrect test (b97c8d3)

• Fix manipulation tests in Android 4.4 (0b0d4c6)

• Remove side-effects of one attributes test (f9ea869)

• Account for new offset tests (f52fa81)

• Make iframe tests wait after checking isReady (08d73d7)

• Refactor testIframe() to make it DRYer and more consistent (e5ffcb0)

• Weaken sync-assumption from jQuery.when to jQuery.ready.then (f496182)

• Test element position outside view (#2909, a2f63ff)

• Make the regex catching Safari 9.0/9.1 more resilient (7f2ebd2)

Traversing

• .not/.filter consistency with non-elements (#2808, 0e2f8f9)

• Never let .closest() match positional selectors (#2796, a268f52)

• Restore jQuery push behavior in .find (#2370, 4d3050b)

详情：jQuery 3.0 Final Released!