Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
513 views
in Technique[技术] by (71.8m points)

html - CSS height not working if body has min-height

I don't get my first child in the body to 100% height, if the body has min-height specified.

<html>
    <head>
        <style>
            html {
                height:100%;
            }
            body {
                min-height:100%;
            }
            #wrapper {
                height:100%;
                min-width:1120px; /* 250px each side (content width is 870px) */
                max-width:2000px;
                background-image:url(bg.png);
                background-position:50% 25px;
                background-repeat:no-repeat;
                background-size:cover;
            }
        </style>
    </head>
    <body>
        <div id="wrapper">
            <!-- web content -->
        </div>
    </body>
</html>

This does not resize the wrapper to the height of the window. When I remove the min- and use height, it'll work. But I have to have the content height variable...

I did find some other posts here on SO and on google, but they have just questions and no solution.

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…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

When you use a percentage value for height, it will always be relative to the specified height of the parent element. Not the actual height of the parent element, but the height specified in CSS.

So when your body element has no height specified (only min-height, but that does not count), the 100% will not be able to take effect.

One possible solution is to use position: absolute; top: 0; bottom: 0; on your #wrapper, and your div will be stretched. This of course might have some layout consequences that you do not want.

jsFiddle Demo


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…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

1.4m articles

1.4m replys

5 comments

57.0k users

...