css - Using background-attachment:fixed in safari on the ipad

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css - Using background-attachment:fixed in safari on the ipad

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

I'm looking to recreate an effect similiar to the popular science app. Basically have one big background image and then have HTML/CSS layer on top of that. When the user scrolls the content, then background-position of the image should remain in place, and not scroll.

Obviously in a 'regular' browser I would use background-attachment:fixed, but this doesn't seem to work on the ipad. I know position:fixed doesn't work as you might expect according to safari spec - but is there any way of achieving this?

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1 Answer

深蓝 · Answer 1 · 2021-10-16T23:59:31+0000

You can use this code to make a fixed background layer to hack this problem.

#background_wrap {
    z-index: -1;
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background-size: 100%;
    background-image: url('xx.jpg');
    background-attachment: fixed;
}

And put <div id="background_wrap"></div> into <body></body>

<body>
<div id="background_wrap"></div>
</body>

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