html - Iframe 100% height inside body with padding

Question

Ask a Question

Welcome To Ask or Share your Answers For Others

html - Iframe 100% height inside body with padding

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

I have an iframe in my HTML document and I'm having a bit of trouble.

I also have a URL bar (fixed position element) at the top of the page that should stay with the user as they scroll. That works fine. I'd like the iframe to fill the remaining space but not be covered up by the URL bar.

This is what I'm talking about. http://s75582.gridserver.com/Ls

How can I fix this so that the URL bar doesn't cover up part of the page? When I try setting padding in the body, it just creates an extra, annoying scroll bar.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…

458 views

1 Answer

深蓝 · Answer 1 · 2021-10-17T02:56:38+0000

Whilst you can't say ‘height: 100% minus some pixels’ in CSS, you can make the iframe 100% high, then push its top down using padding. Then you can take advantage of the CSS3 box-sizing property to make the padding get subtracted from the height.

This:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html><head>
    <title>test</title>
    <style type="text/css">
        html, body { margin: 0; padding: 0; height: 100%; }
        #bar { height: 32px; background: red; }
        iframe {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            border: none; padding-top: 32px;
            box-sizing: border-box; -moz-box-sizing: border-box; -webkit-box-sizing: border-box;
        }
    </style>
</head><body>
    <iframe src="http://www.google.com/"></iframe>
    <div id="bar">foo</div>
<body></html>

Works on IE8, Moz, Op, Saf, Chrome. You'd have to carry on using a JavaScript fallback to make the extra scrollbar disappear for browsers that don't support box-sizing though (in particular IE up to 7).

Categories

html - Iframe 100% height inside body with padding

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

Please log in or register to add a comment.

Just Browsing Browsing

Most popular tags