每个 event 都有一个event.bubbles属性，可以知道它可否冒泡。(ref：)
当然 W3 DOM Level 3 Events 的细则里已经附上这个表格了：
| Event Type | Bubbling phase |
|---|---|
| abort | ✗ |
| beforeinput | ✔ |
| blur | ✗ |
| click | ✔ |
| compositionstart | ✔ |
| compositionupdate | ✔ |
| compositionend | ✔ |
| dblclick | ✔ |
| error | ✗ |
| focus | ✗ |
| focusin | ✔ |
| focusout | ✔ |
| input | ✔ |
| keydown | ✔ |
| keyup | ✔ |
| load | ✗ |
| mousedown | ✔ |
| mouseenter | ✗ |
| mouseleave | ✗ |
| mousemove | ✔ |
| mouseout | ✔ |
| mouseover | ✔ |
| mouseup | ✔ |
| resize | ✗ |
| scroll | ✔ |
| select | ✔ |
| unload | ✗ |
| wheel | ✔ |
还附上了 Legacy Events（旧浏览器支持的非标准遗留事件）的 bubble 属性。
| Event Type | Bubbling phase |
|---|---|
| DOMActivate | ✔ |
| DOMAttrModified | ✔ |
| DOMCharacterDataModified | ✔ |
| DOMFocusIn | ✔ |
| DOMFocusOut | ✔ |
| DOMNodeInserted | ✔ |
| DOMNodeInsertedIntoDocument | ✗ |
| DOMNodeRemoved | ✔ |
| DOMNodeRemovedFromDocument | ✗ |
| DOMSubtreeModified | ✔ |
| keypress | ✔ |
H5 还定义了一些新事件：
，都不冒泡
dragstart、drag、dragenter、dragexit、dragleave、dragover、drop、dragend均冒泡：
popstate，hashchange冒泡（从window开始……所以意义在哪里），pagetransition不冒泡
还有很多H5新事件，大多在草案阶段，就不一一翻开了。
此外，这里还有一个关于IE的事件列表,
事件冒泡是我们实现事件代理（委托）的关键，在avalon1.6中，默认让能冒泡的事件都使用事件代理实现了！
var canBubbleUp = { click: true , dblclick: true , keydown: true , keypress: true , keyup: true , mousedown: true , mousemove: true , mouseup: true , mouseover: true , mouseout: true , wheel: true , mousewheel: true , input: true , change: true , beforeinput: true , compositionstart: true , compositionupdate: true , compositionend: true , select: true , cut: true , paste: true , focusin: true , focusout: true , DOMFocusIn: true , DOMFocusOut: true , DOMActivate: true , dragend: true , datasetchanged: true } if (!W3C) { delete canBubbleUp.change delete canBubbleUp.select } //.... |