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195 lines
3.2 KiB
195 lines
3.2 KiB
10 years ago
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---
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id: events-zh-CN
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title: 事件系统
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permalink: events-zh-CN.html
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prev: tags-and-attributes-zh-CN.html
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next: dom-differences-zh-CN.html
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---
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## 合成事件
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事件处理程序通过 `合成事件`(`SyntheticEvent`)的实例传递,`SyntheticEvent` 是浏览器原生事件跨浏览器的封装。`SyntheticEvent` 和浏览器原生事件一样有 `stopPropagation()`、`preventDefault()` 接口,而且这些接口夸浏览器兼容。
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如果出于某些原因想使用浏览器原生事件,可以使用 `nativeEvent` 属性获取。每个和成事件(`SyntheticEvent`)对象都有以下属性:
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```javascript
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boolean bubbles
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boolean cancelable
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DOMEventTarget currentTarget
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boolean defaultPrevented
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Number eventPhase
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boolean isTrusted
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DOMEvent nativeEvent
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void preventDefault()
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void stopPropagation()
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DOMEventTarget target
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Date timeStamp
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String type
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```
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> 注意:
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>
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> React v0.12 中,事件处理程序返回 `false` 不再停止事件传播,取而代之,应该根据需要手动触发 `e.stopPropagation()` 或 `e.preventDefault()`。
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## 支持的事件
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React 将事件统一化,使事件在不同浏览器上有一致的属性。
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下面的事件处理程序在事件冒泡阶段被触发。如果要注册事件捕获处理程序,应该使用 `Capture` 事件,例如使用 `onClickCapture` 处理点击事件的捕获阶段,而不是 `onClick`。
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### 剪贴板事件
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事件名称:
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```
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onCopy onCut onPaste
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```
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属性:
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```javascript
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DOMDataTransfer clipboardData
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```
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### 键盘事件
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事件名称:
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```
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onKeyDown onKeyPress onKeyUp
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```
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属性:
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```javascript
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boolean altKey
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Number charCode
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boolean ctrlKey
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function getModifierState(key)
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String key
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Number keyCode
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String locale
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Number location
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boolean metaKey
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boolean repeat
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boolean shiftKey
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Number which
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```
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### 焦点事件
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事件名称
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```
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onFocus onBlur
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```
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属性:
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```javascript
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DOMEventTarget relatedTarget
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```
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### 表单事件
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事件名称:
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```
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onChange onInput onSubmit
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```
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关于 `onChange` 事件的更多信息,参见 [表单组件](/react/docs/forms-zh-CN.html)。
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### 鼠标事件
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事件名称:
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```
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onClick onDoubleClick onDrag onDragEnd onDragEnter onDragExit onDragLeave
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onDragOver onDragStart onDrop onMouseDown onMouseEnter onMouseLeave
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onMouseMove onMouseOut onMouseOver onMouseUp
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```
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属性:
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```javascript
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boolean altKey
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Number button
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Number buttons
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Number clientX
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Number clientY
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boolean ctrlKey
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function getModifierState(key)
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boolean metaKey
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Number pageX
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Number pageY
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DOMEventTarget relatedTarget
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Number screenX
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Number screenY
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boolean shiftKey
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```
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### 触控事件
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在渲染任意组件之前调用 `React.initializeTouchEvents(true)`,以启用触控事件。
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事件名称:
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```
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onTouchCancel onTouchEnd onTouchMove onTouchStart
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```
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属性:
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```javascript
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boolean altKey
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DOMTouchList changedTouches
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boolean ctrlKey
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function getModifierState(key)
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boolean metaKey
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boolean shiftKey
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DOMTouchList targetTouches
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DOMTouchList touches
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```
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### 用户界面事件
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事件名称:
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```
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onScroll
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```
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属性:
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```javascript
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Number detail
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DOMAbstractView view
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```
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### 滚轮事件
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事件名称:
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```
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onWheel
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```
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属性:
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```javascript
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Number deltaMode
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Number deltaX
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Number deltaY
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Number deltaZ
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```
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