调度键盘事件在JavaScript中不起作用 [英] Dispatching keyboard event doesn't work in JavaScript

问题描述

我正在尝试使用JavaScript在浏览器中模拟用户输入。单击事件已成功创建和调度，但由于某些原因，键盘事件的类似代码似乎根本不起作用。

I'm trying to simulate user input in browser with JavaScript. Click events are created and dispatched successfully but for some reasons a similar code for keyboard events doesn't seem to work at all.

var event = document.createEvent（ 的KeyboardEvent）;
event.initKeyEvent（keydown，true，true，window，false，false，false，false，87,0）;
document.getElementById（id）。dispatchEvent（event）;

返回true但对应的字符不出现在输入中。我尝试使用按键和键盘也不起作用（针对FF和Chrome测试）。
由于某些安全原因，浏览器是否禁止它或我做错了什么？是否有解决方法使其工作？

This returns true but the corresponding character doesn't appear in the input. I tried with keypress and keyup as well which don't work either (tested against FF and Chrome). Is it prohibited by browser for some security reasons or I'm doing something wrong? Is there a workaround to get it work?

推荐答案

事件调度正常，所有事件监听器都将触发，没有发生的是角色没有得到打字。这是因为事件的起源不是来自正确的来源。这是一个安全功能。

The event dispatches fine and all the event listeners will fire, the thing that does not happen is the character does not get "typed". This is because the origin of the event is not from the correct source. It's a "security feature".

模拟输入文本的唯一方法是重新设置值或以其他方式明确更改节点的内容。

The only way to simulate typing with resulting text is by re-setting the value or otherwise explicitly changing the contents of the node.

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