音频播放audio中play()的踩坑

audio的踩坑

1、问题描述

使用js播放audio视频时，用户没有点击浏览器，此时是无法触发js事件中的play的，
报错信息如下：Uncaught (in promise) DOMException: play() failed because the user didn't interact with the document 
如下代码：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>音节导航</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        body,html{
            width: 100%;
            height: 100%;
            overflow: hidden;
            position: relative;
        }
        a {
            text-decoration: none;
            display: block;
            width: 100%;
            height: 100%;
            text-align: center;
        }
        ul {
            position: absolute;
            top: 0;
            bottom: 0;
            right: 0;
            left: 0;
            margin: auto;
            display: flex;
            width: 900px;
            height: 38px;
            line-height: 38px;
            list-style: none;
            border: 1px solid;
        }
        ul>li {
            display: block;
            height: 100%;
            flex: 1;
            overflow: hidden;
        }
        ul>li:not(:first-child) {
            border-left: 1px solid;
        }
        ul>li .down {
            width: 100%;
            height: 100%;
            background-color: blue;
            transition: 0.5s;
        }
        ul>li:hover .down {
            transform: translateY(-38px);
        }
    </style>
</head>
<body>

    <audio muted></audio>

    <ul>
        <li>
            <a href="javascript:;">导航1</a>
            <div class="down"></div>
        </li>
        <li>
            <a href="javascript:;">导航2</a>
            <div class="down"></div>
        </li>
        <li>
            <a href="javascript:;">导航3</a>
            <div class="down"></div>
        </li>
        <li>
            <a href="javascript:;">导航4</a>
            <div class="down"></div>
        </li>
        <li>
            <a href="javascript:;">导航5</a>
            <div class="down"></div>
        </li>
        <li>
            <a href="javascript:;">导航1</a>
            <div class="down"></div>
        </li>
        <li>
            <a href="javascript:;">导航1</a>
            <div class="down"></div>
        </li>
        <li>
            <a href="javascript:;">导航1</a>
            <div class="down"></div>
        </li>
        <li>
            <a href="javascript:;">导航1</a>
            <div class="down"></div>
        </li>
    </ul>
</body>
<script>
    window.onload = function () {
        // console.log(123)
        var audio = document.getElementsByTagName("audio")[0]
        // audio.muted = false
        var lis = document.getElementsByTagName("li")
        for (var i=0;i<lis.length;i++) {
            lis[i].addEventListener("mouseenter",function() {
                audio.src = "../resource/mp3/du.mp3"
                audio.muted = false
                audio.play()
            })
        }
    }
</script>
</html>

2、原因

目前浏览器策略是，web网页需要至少又一次可信任的用户行为后

解决办法：
	可信任的用户行为包括touchstart触摸或者click点击。
	使用这两个办法就可以解决这个问题

posted on 2021-11-11 15:36 黄文超阅读(1481) 评论(0) 收藏举报

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