能冒泡的事件

每个 event 都有一个event.bubbles属性，可以知道它可否冒泡。(ref：W3定义的Event Interface)

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：

• media相关事件，都不冒泡
• drag相关事件 dragstart 、 drag 、 dragenter 、 dragexit 、 dragleave 、 dragover 、 drop 、 dragend均冒泡
• History相关事件：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,www.feiesoft.com/html/events…

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 } //....

转载于:https://juejin.im/post/5ce642635188252d2025ca85