CSS thorough research (2)

Github pages blog 1. CSS Box Model 1. Box Structure

Margin-border-padding structure + content composition Box Model

Note 1. width and height take the width and height of the content area, excluding padding border margin, but the actual height occupied by the box must be calculated as three (padding border margin. value assignment order, clockwise, top-> right-> bottom-> left)

---- Top (1) -----> | left (4) right (2) | <--- bottom (3) ---- ''' value assignment. This is a single value and the four values are the same, for example

Margin: 10px; 'value assignment, two values. The two values are assigned to top right, that is, the first two. Then, bottom = top, left = right, and three values, assign values to top right bottom, that is, the first three, and then left = right. Four values are required... 3. html ''' in each Browser ''' Representation in browser Developer Tools