Detailed analysis of margin attribute in CSS
Introduction
update time：2018-01-06
margin can be negative
In the box model, the width/height, padding, and border of the content area cannot be negative values, with the exception of margin, which can be negative values.
I don’t know much about the skills of using negative margin values. I will add more when I have the opportunity in the future. Here is a classic application. The negative value of margin-left is combined with floating to achieve a fluid layout that does not change the DOM structure.
This demo is the same as the one in the CSS float analysis article.
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