jQuery keyup、keydown、keypress 和 input 事件之间有什么区别？
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What's the difference between keyup, keydown, keypress and input events?
提问by Tony Vincent
I have been trying to understand jQuery keypress, keydown, keyup and inputevents. But I found them quite confusing. Could someone please point out the exact differences ? Also I would like to know do all of them get triggered when the user paste a piece of text .
Thanks
我一直在尝试了解 jQuery 按键、按键、按键和输入事件。但我发现它们很混乱。有人可以指出确切的区别吗？另外我想知道当用户粘贴一段文本时，所有这些都会被触发。
谢谢
回答by dodopok
According to jQuery docs:
根据jQuery 文档：
The keypressevent is sent to an element when the browser registers keyboard input. This is similar to the keydownevent, except that modifier and non-printing keys such as Shift, Esc, and delete trigger keydown events but not keypress events. Other differences between the two events may arise depending on platform and browser.
The keyupevent is sent to an element when the user releases a key on the keyboard.
The oninputevent it's an event that triggers whenever the input changes.
的按键事件被发送到当浏览器登记键盘输入的元件。这类似于keydown事件，不同之处在于修饰符和非打印键（例如 Shift、Esc 和 delete 会触发 keydown 事件而不是 keypress 事件）。根据平台和浏览器的不同，可能会出现两个事件之间的其他差异。
所述KEYUP事件被发送到当用户释放键盘上的一个键的元素。
该oninput事件这是一个事件触发，只要输入的变化。
However the input event is not supported in IE version below 9. In that case, you could use proprietary event onpropertychange, it does the same as oninput.
但是，IE 9 以下版本不支持输入事件。在这种情况下，您可以使用专有事件 onpropertychange，它的作用与 oninput 相同。
But in your case, you could use the pasteand changeevent together. You should use changetoo because pasteonly happens on browsers that support it on an explicit paste.
但在您的情况下，您可以同时使用paste和change事件。您也应该使用更改，因为粘贴仅发生在支持显式粘贴的浏览器上。
