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README
GPL-2.0

iQuery

Build Status

兼容 jQuery API 的 DOM / AJAX 基础库,基于原创的 ECMA / W3C polyfill 构建,并内置很多常用的 jQuery 扩展 API。

Join the chat at https://gitter.im/iQuery-js/Lobby

在 API 形态上尽力兼容 jQuery 的同时,iQuery 在内部实现上采取 “面向未来,向前兼容”的 Polyfill 策略 —— jQuery 标准 API(2500 行)、iQuery 扩展 API(1800 行)尽力基于 W3C、ECMA 最新标准中的优秀 API,老旧浏览器兼容代码(部分基于 jQuery API,1200+ 行)尽力包装成与新 API 相同的形式(原型拓展),并独立为外部模块。这样做不但能复用 jQuery API 来高效实现,还方便开发人员自行裁剪。

【注】对 IE 的兼容仅限其“标准模式”,而非“兼容性视图”。

【竞品比较】

iQuery jQuery Zepto JSLite
浏览器兼容 IE 8+ IE 6+ (v1.x)、IE 9+ (v2.0+) IE 10+ IE 10+
ECMA / W3C polyfill ×(各模块自行实现 Fix)
扩展 API
触控事件 单指 × 多指 ×
源代码模块化 AMD AMD IIFE IIFE
API 注解(JSDoc) × × ×
测试框架 Mocha QUnit Evidence Mocha

【入门】

  1. 基础知识 ——《jQuery API 文档

  2. HTML 源码基本结构

<!DocType HTML>
<html><head>
    <meta http-equiv="X-UA-Compatible" content="IE=Edge, Chrome=1" />

    <!--  1. 独立使用  -->
    <script src="path/to/iQuery.min.js"></script>

    <!--  2. AMD 规范加载  -->
    <script src="https://cdn.bootcss.com/require.js/2.3.5/require.min.js"></script>
    <script>
        require.config({
            paths:    {
                iQuery:    'path/to/iQuery.min.js'
            }
        });
    </script>
</head><body>
    ...
</body></html>

【API 总览】

对 jQuery(最新版)的增强

以下扩展已收录在本项目的 jQueryKit.js 中,方便配合其它 jQuery API 实现 ——

【API 文档】及更多变更:

  • 内置一个改进且向下兼容的 $.browser 对象,能通过 直接比较版本号来区分浏览器
  • 新增 计时相关方法(秒基准)—— $.every()$.wait()$.start()$.end()
  • $.unique() 方法不局限于 DOM 元素数组
  • 新增 对象链回溯方法 —— $.trace()
  • 新增 对象补丁方法 —— $.patch()
  • 新增 字符串字节长度方法 —— $.byteLength()
  • 新增 函数柯里化方法 —— $.curry()
  • 新增 URL 信息提取方法 —— $.fileName()$.filePath()$.urlDomain()
  • 新增 URL 参数签名方法 —— $.paramSign()
  • $.parseJSON() 支持 递归解析,会将 JSON 字符串中的内层字符串 eval 为 JS 实值/例
  • 新增 JSON 格式化显示方法 —— $.formatJSON()
  • 基于官方 $.ajaxTransport() 重载 JSONP 实现,支持基本的异常处理
  • $.ajax() 支持 form 元素、FormData 对象的请求数据形式,整合 XHR、XDR、JSONP、iframe 自适应 跨域请求
  • $.ajax() 自动转换响应内容为 HTML、XML 或 JSON 对象实例
  • 新增 $.delete()$.put(),方便实现基于 RESTful API 的单页应用
  • 新增 $.fn.htmlExec() W3C HTML 解析器方法,并基于此重构 $.fn.load() 内部实现,方便 DOM 片段清理、脚本调试
  • 新增 多媒体元素加载完成方法 —— $.fn.mediaReady()
  • 封装了 表单元素无刷新提交,并可直接绑定响应回调 —— $.fn.ajaxSubmit()(基于前述的几个 AJAX 增强方法 构建)
  • 新增 选择符合法性判断方法 —— $.isSelector()
  • 更多 jQuery 伪类选择符
    • :image 还支持 img, link[type="image/x-icon"], svg, canvas 及设置了 background-image 的普通元素
    • :button 还支持 input[type="submit"], input[type="reset"], input[type="image"]
    • :input 还支持 contentEditable、designMode 属性
    • 自带 :indeterminate,属 CSS 3 标准
    • 自带 :focusable,属 jQuery UI 标准
    • 自带 :data(),属 jQuery UI 标准
    • 自带 :field,匹配所有含 可提交字段的元素
    • 新增 :list,等价于 ul, ol, dl, tbody, datalist
    • 新增 :media,等价于 :image, iframe, object, embed, audio, video
    • 新增 :loaded,等价于 img, audio, videodocument 加载结束
    • 新增 :scrollable,匹配所有 内容可滚动的元素
  • 新增 祖先元素交集方法 —— $.fn.sameParents()
  • 新增 有滚动条的祖先元素方法 —— $.fn.scrollParents()
  • 新增 元素平滑滚动方法 —— $.fn.scrollTo()
  • 所有类型的 DOM 信息读写器.attr().prop().css().data())均支持“不传键名时返回 信息全集”特性
  • 新增 DOM 数据归并方法 —— $.fn.reduce()
  • .css() 取值时,会把 纯数字值、像素值 直接返回为 Number 类型
  • .css() 赋值一律默认 important 优先级,确保赋值的有效性
  • $.fn.show() 兼容 元素非固有 display 属性值,避免破坏 复杂布局
  • 新增 DOM 元素 z-index 集成方法 —— $.fn.zIndex(),集 取实际值、赋值、同辈置顶/沉底 功能于一身
  • 新增 CSS 选择符优先级计算方法 —— $.selectorPriority()
  • 新增 CSS 厂商命名获取方法 —— $.cssName()
  • 新增 CSS 集合对象搜索方法 —— $.searchCSS()
  • 自带 DOM 唯一 ID 设置方法 —— $.fn.uniqueId()jQuery UI 标准
  • 新增 DOM 选中内容读写方法 —— $.fn.selection()
  • $.fn.focus() 会让所有可见元素获得焦点
  • 新增 被动观察者对象 —— $.Observer()
  • 新增 $.customEvent() 事件扩展接口,并基于此实现 input 标准事件的补丁
  • 封装了 触屏单指手势事件(tap、press、swipe),并为桌面端、移动端提供一致的操作体验
  • 新增 用户操作空闲事件方法 —— $.fn.onIdleFor()
  • 新增 跨页面消息事件方法 —— $.fn.onReply()(基于 window.postMessage()
  • $.fn.animate() 支持类似 jQuery UI $.fn.effect() 动画效果名参数(基于 CSS Animation 实现)
  • 新增 CSS 动画类切换方法 —— $.fn.toggleAnimate()
  • 新增 Base64 文本转 二进制对象方法 —— $.toBlob()
  • 新增 数据哈希方法 —— $.dataHash()
    • 默认算法:CRC-32
    • 还支持 现代浏览器 Crypto API

未实现的 jQuery(最新版)特性

  • 没有 $.noConflict(),但不会强占 jQuery 变量
  • 不支持 浏览器 内置类型(构造函数)相应的 $.isXXX() 系列方法
  • 不支持 浏览器特性检测
  • 不支持 $.ajax() 不常用的自定义选项
  • 不支持 $.Deferred()
  • jQuery 扩展伪类选择符:只支持 常用且“难以用 CSS 标准选择符 或 jQuery API 实现其功能”的
  • 不支持 XPath 选择器、操作 XML 文档
  • 不支持一些不常用的 jQuery 静态/实例方法
  • 不支持 动画队列外部操作 API

ECMA、W3C 标准 API 补丁

  • 自带 Number.isInteger() 整数判断方法
  • 自带 Number.isSafeInteger() 安全整数判断方法
  • 自带 支持“非空白符”的 String.prototype.trim()(借鉴 PHP)
  • 自带 String.prototype.repeat 标准方法
  • 自带 String.prototype.padStart 标准方法
  • 自带 String.prototype.padEnd 标准方法
  • 自带 Array.from() 标准方法
  • 自带 Array.prototype.indexOf() 标准方法
  • 自带 Array.prototype.reduce() 标准方法
  • 自带 Function.prototype.name 属性补丁
  • 自带 Object.keys() 标准方法
  • 自带 Object.getPrototypeOf() 标准方法
  • 自带 Object.create() 标准方法
  • 自带 Date.now() 标准方法
  • 自带 Promise() 标准对象构造函数
  • 重写 Error.prototype.valueOf(),使 IE 10- 返回可查询的错误码(附带 官方文档 URL)
  • 新增 HTMLHttpRequest 对象,封装了 JSONP Getiframe Post
  • 自带 HTMLDocument.prototype.currentScript 属性
  • 自带 HTMLDocument.prototype.scrollingElement 属性
  • 自带 ChildNode 接口remove()replaceWith() 实例方法
  • 自带 Element.prototype.textContent 属性
  • 自带 Element.prototype.innerHTML 的 IE 8 补丁
  • 自带 HTMLCollection 对象,修复 IE 10- Element.prototype.children 属性在其元素有 name 属性时的“数字键值缺失”Bug
  • 自带 Element 对象的 firstElementChildlastElementChildpreviousElementSiblingnextElementSibling 属性
  • 自带 Element.prototype.matches 标准草案方法
  • 自带 DOMTokenList 对象,为各种浏览器的 <a /><area /><link /><svg /> 等元素提供 classListrelList 属性支持
  • 自带 DOMStringMap 对象,为 IE 11- 提供 dataset 支持
  • 自带 HTMLSelectElement.prototype.selectedOptions 属性的 IE 补丁
  • 自带 location.originHTMLAnchorElement.prototype.origin 只读属性 IE 11- 补丁
  • 修正 IE 8 DOM Attribute 系列方法对 JavaScript 关键字的特殊处理
  • 自带 CSSStyleDeclaration 对象,为 IE 8 提供 getComputedStyle 支持,并封装了 M$ DirectX 滤镜属性转换
  • 自带 Mozilla Firefox 元素 CSS 默认规则对象 获取方法 Window.getMatchedCSSRules()
  • 自带 Google Chrome 元素 CSS 匹配规则对象 获取方法 Window.getMatchedCSSRules()
  • 自带 FormData() 标准对象构造函数,为 IE 10- 提供 表单数据封装
  • 自带 DOMImplementation() 标准对象 createDocumentcreateHTMLDocment 实例方法,为 IE 8 提供 XML / HTML 文档对象创建支持
  • 自带 DOMParser() 标准对象构造函数,为 IE 8+ 提供 XML / SVG / HTML 文档代码解析支持
  • 自带 URL() 标准对象构造函数
  • 自带 URLSearchParams() 标准对象构造函数
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jQuery 兼容 API 扩展库,基于原创的 ECMA / W3C polyfill 构建 展开 收起
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