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css3实现网页背景图片高斯模糊效果

乖兔 更新于: 2020-12-08 分类:CSS 评论 ( 0 )

css3可以通过代码渲染的方式实现网页背景的高斯模糊效果,告别更换背景时候的ps批图。分享三种css3实现网页背景图片高斯模糊效果的方法。

css3实现网页背景模糊方法一(正常模糊):

<Style>
        html,
        body {
            width: 100%;
            height: 100%;
        }

        * {
            margin: 0;
            padding: 0;
        }

        /*背景模糊*/
        .bg {
            width: 100%;
            height: 100%;
            position: relative;
            background: url("./bg.jpg") no-repeat fixed;
            background-size: cover;
            box-sizing: border-box;
            filter: blur(2px);
            z-index: 1;
        }

        .content {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            width: 200px;
            height: 200px;
            text-align: center;
            z-index: 2;
        }
    </Style>
</head>

<body>
    <div class="bg">
        <div class="content">背景模糊</div>
    </div>
</body>

实现效果如图:

css3实现网页背景模糊.png

css3实现网页背景模糊方法二(局部模糊):

<Style>
        html,
        body {
            width: 100%;
            height: 100%;
        }

        * {
            margin: 0;
            padding: 0;
        }

        /*背景模糊*/
        .bg {
            width: 100%;
            height: 100%;
            position: relative;
            background: url("./bg.jpg") no-repeat fixed;
            background-size: cover;
            box-sizing: border-box;
            z-index: 1;
        }

        .content {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            width: 200px;
            height: 200px;
            background: inherit;
            z-index: 2;
        }

        .content:after {
            content: "";
            width: 100%;
            height: 100%;
            position: absolute;
            left: 0;
            top: 0;
            background: inherit;
            filter: blur(15px);
            /*为了模糊更明显,调高模糊度*/
            z-index: 3;
        }

        .content>div {
            width: 100%;
            height: 100%;
            text-align: center;
            line-height: 200px;
            position: absolute;
            left: 0;
            top: 0;
            z-index: 4;
        }
    </Style>
</head>

<body>
    <div class="bg">
        <div class="content">
            <div>背景局部模糊</div>
        </div>
    </div>
</body>

实现效果如下图:

css3实现背景图片高斯模糊.png


css3实现网页背景模糊方法三(局部清晰):

<Style>
        html,
        body {
            width: 100%;
            height: 100%;
        }

        * {
            margin: 0;
            padding: 0;
        }

        /*背景模糊*/
        .bg {
            width: 100%;
            height: 100%;
            position: relative;
            background: url("./bg.jpg") no-repeat fixed;
            background-size: cover;
            box-sizing: border-box;
            z-index: 1;
        }

        .bg:after {
            content: "";
            width: 100%;
            height: 100%;
            position: absolute;
            left: 0;
            top: 0;
            background: inherit;
            filter: blur(5px);
            z-index: 2;
        }

        .content {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            width: 200px;
            line-height: 200px;
            text-align: center;
            background: inherit;
            z-index: 3;
            box-shadow: 0 0 10px 6px rgba(0, 0, 0, .5);
        }
    </Style>
</head>

<body>
    <div class="bg">
        <div class="content">
            <div>背景局部清晰</div>
        </div>
    </div>
</body>

实现效果如下图:

css3网页背景局部清晰.png

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