Detailed explanation of css3 box-sizing-CSS Tutorial-php.cn

Detailed explanation of css3 box-sizing

高洛峰

Release： 2017-02-20 11:28:54

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People slowly realized that the traditional box model was not straightforward, so they added a new CSS property called box-sizing.

box-sizing: Box size,Box model.

##We often encounter that the width of the left and right modules is 50%. Adding a border will cause it to fall. Adding this style can solve the problem. Take a look at the chestnut:

<!DOCTYPE html><html><head><style> p.container{width:300px;border:10px solid blue;}p.box{box-sizing:border-box;-moz-box-sizing:border-box; /* Firefox */-webkit-box-sizing:border-box; /* Safari */width:50%;height:80px;padding:10px;border:10px solid red;float:left;}</style></head><body><p class="container"><p class="box">这个 p 占据左半部分。</p><p class="box">这个 p 占据右半部分。</p><p style="clear:both;"></p></p></body></html>

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The box-sizing attribute can be one of three values: content-box (default), border-box, padding- box.

Content-box, border and padding are not calculated into width

padding-box, padding is calculated into width

border-box, border and padding are calculated into width Inside, it’s actually a weird mode.

李子：

<style type="text/css">
    .content-box{
        box-sizing:content-box;
        -moz-box-sizing:content-box;
        width: 100px;
        height: 100px;
        padding: 20px;
        border: 5px solid #E6A43F;
        background: blue;
    }
    .padding-box{
        box-sizing:padding-box;
        -moz-box-sizing:padding-box;
        width: 100px;
        height: 100px;
        padding: 20px;
        border: 5px solid #186645;
        background: red;                
    }
    .border-box{
        box-sizing:border-box;
        -moz-box-sizing:border-box;
        width: 100px;
        height: 100px;
        padding: 20px;
        border: 5px solid #3DA3EF;
        background: yellow;
    }</style>

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