"Original: CSS" container height 100% and relatively high width method

Container height 100% is a requirement that is often used, any container can be implemented, and no nested relationships are required.

The body as a container, as an internal object of the upper label, his height set to 100% is the key.

The most basic example

* {margin:0; padding:0; border:0;}
html,body {height:100%;}
#box_2 {height:100%; background: #000;}

Effect Demo: Http://www.rexsong.com/blog/atta ... _height100_base.htm

Absolute positioning overlap effect

#box_1 {position:absolute; top:0; left:0; width:100%; height:50px; background: #f00; z-index:2;}
#box_2 {position:absolute; left:0; top:0; width:100%; height:100%; background: #000; z-index:1;}

Effect Demo: Http://www.rexsong.com/blog/atta ... 301_height100_1.htm

Vertical height Relative size effect

#box_1 {position:absolute; top:0; left:0; width:100%; height:30%; background: #f00; z-index:2;}
#box_2 {position:absolute; left:0; top:30%; width:100%; height:70%; background: #000; z-index:1;}

Effect Demo: Http://www.rexsong.com/blog/atta ... 107_height100_2.htm

Horizontal width Relative size effect

#box_1 {position:absolute; top:0; left:0; width:30%; height:100%; background: #f00; z-index:2;}
#box_2 {position:absolute; top:0; right:0; width:70%; height:100%; background: #000; z-index:1;}

Effect Demo: Http://www.rexsong.com/blog/atta ... 647_height100_3.htm

In practical applications, there can be many changes that make it easy to implement absolute or relative multiple column vertical and horizontal without nesting.

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