javascript - 如何知道事件处理程序中的按键事件是否已完成其工作

Question

我有一个文本框的按键事件处理程序。在该事件处理程序中，我正在检查关键代码 46/8(退格/删除)。并在按下这些键后获取文本框的结果值。

假设我的文本框有 1234，我想在删除最后一个字符后获取事件处理程序中文本框的值。这意味着我需要 123，但当我读取文本框的值时，它仍然显示 1234。在事件完成其工作后，如何读取文本框的值？

Answer 1

您想要 keyup 事件:

The keydown, keypress and keyup events fire when the user presses a key.

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

keypress Fires when an actual character is being inserted in, for instance, a text input. It repeats while the user keeps the key depressed.

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

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