javascript document.createEvent 失败
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document.createEvent fails
提问by shmichael
The following code fails (in javascript console, and also when injecting a script via browser extension)
以下代码失败（在 javascript 控制台中，以及通过浏览器扩展程序注入脚本时）
document.createEvent('TestEvent')
Firebug spits out:
萤火虫吐出：
[Exception... "Operation is not supported"
code: "9"
nsresult: "0x80530009 (NS_ERROR_DOM_NOT_SUPPORTED_ERR)"
location: "http://www.google.com
Line: 71"]
Chrome gives a similar error message. What am I doing wrong?
Chrome 给出了类似的错误消息。我究竟做错了什么？
回答by Felix Kling
From the documentation:
从文档：
typeis a string that represents the type of event to be created. Possible event types include "UIEvents", "MouseEvents", "MutationEvents", and "HTMLEvents".
type是一个字符串，表示要创建的事件类型。可能的事件类型包括“UIEvents”、“MouseEvents”、“MutationEvents”和“HTMLEvents”。
So you probably want:
所以你可能想要：
var e = document.createEvent('HTMLEvents');
e.initEvent('TestEvent', true, true);
See event.initEvent.
Update:Maybe document.createEvent('Event');is even better for custom events, but it is part of DOM Level 3 and I don't know how much supported it is.
更新：document.createEvent('Event');对于自定义事件来说也许更好，但它是 DOM Level 3 的一部分，我不知道它得到了多少支持。
回答by powtac
Use one of these event types: https://developer.mozilla.org/en/DOM/document.createEvent#Notes
使用以下事件类型之一：https: //developer.mozilla.org/en/DOM/document.createEvent#Notes
TestEventis not a supported event type. Better use "MouseEvents" or "HTMLEvents".
TestEvent不是受支持的事件类型。最好使用“ MouseEvents”或“ HTMLEvents”。
回答by Ivo Wetzel
There's simply no event type called TestEvent:
根本就没有名为 的事件类型TestEvent：
https://developer.mozilla.org/en/DOM/document.createEvent#section_4
http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-DocumentEvent-createEvent
https://developer.mozilla.org/en/DOM/document.createEvent#section_4
http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-DocumentEvent-createEvent
Maybe you meant TextEvent?
也许你的意思是TextEvent？
PS: Next time do at least a bit of own research before using SO like you would use Google ;)
PS：下次在使用 SO 之前至少做一些自己的研究，就像你使用谷歌一样；）
