如何将 JavaScript 键盘快捷键添加到现有 JavaScript 函数?

问题描述

这是我的代码:

function pauseSound() {
    var pauseSound = document.getElementById("backgroundMusic");
    pauseSound.pause(); 
}

我想为这段代码添加一个键盘快捷键，我该如何做，以便在单击按钮时也可以执行该功能?

I would like to add a keyboard shortcut to this code, how can I do this so that the function can also be executed when a button is clicked too?

尝试添加一个 else if 语句，但它不起作用，有什么想法吗?

Tried to add an else if statement but it doesn't work, any ideas?

function doc_keyUp(e) {
    if (e.ctrlKey && e.keyCode == 88) {
        pauseSound();
    }

    else if (e.ctrlKey && e.keyCode == 84) {
        playSound();
    }
}

推荐答案

文档的 keyup 事件的事件处理程序似乎是一个合适的解决方案.

An event handler for the document's keyup event seems like an appropriate solution.

注意:KeyboardEvent.keyCode 已被弃用，取而代之的是 key.

Note: KeyboardEvent.keyCode was deprecated in favor of key.

// define a handler
function doc_keyUp(e) {

    // this would test for whichever key is 40 (down arrow) and the ctrl key at the same time
    if (e.ctrlKey && e.key === 'ArrowDown') {
        // call your function to do the thing
        pauseSound();
    }
}
// register the handler 
document.addEventListener('keyup', doc_keyUp, false);

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