Question

我试图关注Wes Bos的Javascript30教程，但是当我尝试制作＆＃34; Javascript Drum Kit＆＃34;网站，我无法发挥任何声音。有合适的声音文件，但是当我按下键试图播放声音时，我检查控制台时会出现此错误消息：

jsdrumkit.html:66 - Uncaught (in promise) DOMException: The element has no supported sources.

这是该网站的Javascript：

function playSound(e){
    //querySelector() is just when you need a single return value
    //audio[input] is an attribute selector, and it works just like its CSS counterpart.
    const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
    const key = document.querySelector(`.key[data-key="${e.keyCode}"]`);
    if(!audio) return; 
    audio.currentTime = 0; //rewind the file to the start

    audio.play(); //**line 66 in the site's code**
    console.log(key);
    key.classList.toggle('playing');
}

function removeTransition(e) {
    if(e.propertyName !== 'transform') return; //skip if it's not a transform
    this.classList.remove('playing');
}

const keys = document.querySelectorAll('.key');
keys.forEach(key => key.addEventListener('transitionend', removeTransition));
window.addEventListener('keydown', playSound);

如果我甚至无法让.play（）工作，我会错过什么？

Answer 1

尝试在Firefox中播放。去年Chrome的更新导致播放音频时涉及承诺，部分内容等问题。我正在研究解决方案，但目前尚未找到一个，这里的信息：Audio from Icecast server not playing in Chrome

调用.play（）会创建＆＃34; Uncaught（在promise中）DOMException：该元素没有受支持的源。＆＃34;错误

1 个答案: