jquery - 按键事件在 IE 和 Chrome 中不起作用，但在 FF 中起作用

Question

知道为什么会发生这种情况吗？我通常认为 Chrome 对这些代码会更宽容？

$(document).keypress(function(e) {
    if(e.keyCode == 39) rightImage();
    if(e.keyCode == 37) leftImage();
});

这就是我的按键的样子。我错过了什么吗？右图()；和 leftImage();这些函数应该可以工作，因为我也在其他地方使用这些函数

感谢您的帮助!

Answer 1

将keypress更改为keydown:

$(document).keydown(function(e) {
    if(e.keyCode == 39) rightImage();
    if(e.keyCode == 37) leftImage();
});

按下按键时发生 keydown 事件，紧接着发生 keypress 事件。然后当松开按键时会产生 keyup 事件。

In order to understand the difference between keydown and keypress, it is useful to understand the difference between a "character" and a "key". A "key" is a physical button on the computer's keyboard while a "character" is a symbol typed by pressing a button. In theory, the keydown and keyup events represent keys being pressed or released, while the keypress event represents a character being typed. The implementation of the theory is not same in all browsers.