如何使用键盘上的箭头键分别将div向左/向右移动100px [英] How use keyboard arrow keys to move a div 100px left/right respectively

问题描述

我有一个ID为bottom_arrow的div，我想使用左/右键盘箭头将div左右移动100px.我该怎么办?

I have a div with an id of bottom_arrow and I want to use my keyboard arrows left/right to move the div left and right 100px. How can I do this?

推荐答案

通常，按键事件会进入具有焦点的输入或某些控件，如果您通常需要将它们放在页面上，有时会有些皱眉由于删除了标准行为，因此将keydown事件绑定到整个文档.

As a rule keypress events go to an input or some control that has focus, if you need them generally on a page, which is a sometimes a little frowned upon due to removing standard behavior, then bind the keydown event to the whole document.

$('body').keydown(function(event) {
    switch (event.keycode) {
        case 37: // left arrow key
           $('#bottom_arrow').animate({ 'left': '-=100' });
           break;
        case 39: // right arrow key
           $('#bottom_arrow').animate({ 'left': '+=100' });
           break;
    }
});

我使用的是keydown，而不是keypress，因为用户希望它在按下键时触发.

I have used keydown, rather than keypress as a user would expect it to trigger whilst pressing the key.

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