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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