在 Javascript 中更改的文本
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On text changed in Javascript
提问by Chris
i need to be able to able to detect when any character is entered into a textbox in Javascript, and clear another corresponding textbox. I have used the onfocus method for this but when tabbing between textboxes to get to submit, it removes the data and I don't want it to.
我需要能够检测到任何字符何时输入到 Javascript 中的文本框，并清除另一个相应的文本框。我为此使用了 onfocus 方法，但是当在文本框之间切换以提交时，它删除了数据，我不希望它这样做。
What methods are there I can use to trigger a JS event when a textbox is entered into?
当输入文本框时，我可以使用哪些方法来触发 JS 事件？
回答by Bonshington
If you use jQuery:
如果您使用 jQuery：
$("#myTextbox").keypress()
$("#myTextbox").keyup()
$("#myTextbox").keydown()
and if you want to find out which key was pressed, try:
如果您想找出按下了哪个键，请尝试：
$("#myTextbox").keydown(function(e){ alert(e.which); });
if you're not using e.which, you're gonna have cross-browser problems.
如果您不使用 e.which，则会遇到跨浏览器问题。
