图片加载-从模糊到清晰

网页图片从模糊到清晰，可提升网页显示效果，增强用户体验感，具体代码如下。


复制下面代码后点我尝试运行

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<!DOCTYPE html>
<html>
<head>
    <title>大图片加载从模糊到清晰</title>
</head>
<body style="text-align:center">
    <h3>大图片加载从模糊到清晰</h3>
    <div class="mark" style='background-image:url(https://img.ssss.fun/2020/20200705135030.png);background-size:100%;
        filter: blur(4px);transition: all 2.5s;width: 100%;height: 450px;margin-top: 20px;'>
    </div>
    <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
    <script type="text/javascript">
        // 为了看到效果加个延时
        setTimeout(function(){
            // 若图片URL失效请自行替换
            var imgUrl = 'https://img.ssss.fun/2020/20200705135030.png';
            var imgObject = new Image();
 
            imgObject.src = imgUrl;
            imgObject.onload = function(){
               $('.mark').css({
                    backgroundImage: 'url('+imgUrl+')',
                    filter: 'blur(0)'
                });
            }
        }, 1000)
         
    </script>
</body>
</html>