高洛峰2017-04-17 14:38:04
font-size is 12px, then 1rem is 12px;
25px is 25/12rem, which is the width and height.
margin-top is 30/12rem
阿神2017-04-17 14:38:04
You can read this answer rem, it is better to remember this kind of thing by yourself
PHPz2017-04-17 14:38:04
If the font-size of the html root element is 100px;
then 100px = 1rem;
0.5rem = 50px;
.04rem = 4px;
It is recommended to set the font size of the root element to 100px; it is easy to convert.
迷茫2017-04-17 14:38:04
rem is generally used for mobile layout, and the relationship with px is the fontSize of your html. Give you a self-executing function and you will understand.
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You can just introduce this and put it at the top