左，右箭头和空格键上的jQuery kepress检测 [英] jQuery kepress detection on left, right arrows and space bar

问题描述

我正在尝试在此处使用一些jQuery来检测正在按下的键.

I'm trying to use a little jQuery here to detect which keys are being pressed.

我有很多关于尝试使用函数来检测ASCII码并查看被按下的键的信息，但我有些困惑.

I've a lot about trying to use functions to detect ASCII codes and such to see which keys are being pressed, but I'm a little confused.

此外，keyUp，keyDown和keypress有什么区别?

Also, what's the difference between keyUp, keyDown and keypress?

推荐答案

keydown:
当用户按下键时触发.在用户按住键的同时重复该操作.

keydown:
Fires when the user depresses a key. It repeats while the user keeps the key depressed.

按键:
当在例如文本输入中插入实际字符时触发.在用户按住键的同时重复此操作. Safari iPhone不支持.

keypress:
Fires when an actual character is being inserted in, for instance, a text input. It repeats while the user keeps the key depressed. Not supported by Safari iPhone.

键:
在执行该键的默认操作后，用户释放键时触发.

keyup:
Fires when the user releases a key, after the default action of that key has been performed.

来自: http://www.quirksmode.org/dom/events/keys .html

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