为啥每一块的上下有间距呢？

Question

为啥每一块的上下有间距呢?没看到有margin的代码啊

Answer 1

Why is there a gap between the top and bottom of each piece? -PHP Chinese website Q&A-Why is there a gap between the top and bottom of each block? -PHP Chinese website Q&A

Please watch and learn.

Answer 2

在html中，标签有自带的属性，块元素默认是有margin和padding的默认值，所以在编写页面时，需要通过css样式清除默认的padding和margin值！如div{margin:0; padding:0;}