如果另一个语句为真，则取消一个if语句 [英] cancel an if statement if another statement comes true

问题描述

我具有此功能，可以对不同的琴键播放不同的声音.但是，如果我按一个键，然后立即按另一个键，则先前的声音仍会播放.

I have this function that plays different sounds to different keys. But if I press a key, then press another key right away, the previous sound will still play.

我的问题是，播放新声音时如何取消上一个声音?

My question is, how do I cancel the previous sound when a new one is played?

代码如下:

    
 window.addEventListener("keydown", checkKeyPressed, false);

    function checkKeyPressed(evt) {
        if (evt.keyCode == "81") { //q
            document.getElementById('enklyd').play();
        }
        if (evt.keyCode == "87") { //w
            document.getElementById('lyd1').play();
        }
        if (evt.keyCode == "69") { //e
            document.getElementById('lyd2').play();
        }
        if (evt.keyCode == "82") { //r
            document.getElementById('lyd3').play();
        }
        if (evt.keyCode == "84") { //t
            document.getElementById('lyd4').play();
        }
        if (evt.keyCode == "89") { //y
            document.getElementById('lyd5').play();
        }
    }

推荐答案

这实际上不是停止" if语句的问题，因为它们各自正确地完成了工作.您要停止的是正在播放的声音片段.

This isn't really a matter of "stopping" the if statement because they are individually doing their job correctly. What you want to stop is the sound clip being played.

为此，您可以使用 .pause()方法，将 .currentTime 设置为 0 ，或者我相信您也可以设置音量设为0，然后播放即可.

For this you can use the .pause() method, set the .currentTime to 0, or I believe you can also set the volume to 0 and just let it play out.

如评论中所述，有一些SO问题可能已经回答了这一问题.有没有一种独特的情况无法解决?

As mentioned in a comment, there are a few SO questions that may have already answered this. Is there a unique situation that isn't being answered in those?

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