Javascript：传递事件和元素引用
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Javascript: Pass event AND element reference
提问by themisterunknown
I want an input field which calls a javascript function, if a key is pressed. But I'm not able to pass the event as well as an element reference. I can either pass the event:
如果按下某个键，我想要一个调用 javascript 函数的输入字段。但是我无法传递事件和元素引用。我可以通过事件：
<input type="text" name="chmod" value="644" onkeypress="chmod(e)">
or pass the element reference:
或传递元素引用：
<input type="text" name="chmod" value="644" onkeypress="chmod(this)">
If I try to pass both there occurs an error:
如果我尝试通过两者，则会出现错误：
<input type="text" name="chmod" value="644" onkeypress="chmod(e, this)">
Uncaught ReferenceError: e is not defined
Is there any way to pass both, the event and a reference to the element?
有没有办法同时传递事件和对元素的引用？
Cheers, Marco
干杯，马可
回答by Sebastien C.
<input type="text" name="chmod" value="644" onkeypress="chmod(event, this)">
回答by Simon
You should have a reference to the element in the event: event.target.
您应该引用事件中的元素：event.target。
回答by sroes
I'd do the following:
我会做以下事情：
<input type="text" name="chmod" value="644" onkeypress="chmod">
Then your js:
然后你的js：
function chmod(e) {
var element = e.target;
...
}
回答by matewka
The thiskeyword is already in the function
该this关键字已经在功能
<script>
function chmod(e) {
var elem = this;
}
</script>
<input type="text" name="chmod" value="644" onkeypress="chmod">
