4.28 Main Contents

marginof the inline element and inline element, comparison ofpadding

1. margin and value
2. padding , up and down margin and up and down padding value not valid
3. Span style= "font-size:16pt" >margin supports negative values, padding Negative values are not supported,
4. margin two large bug!!!!!!!!!!!
   1. margin drag-and-drop parent: How it happened: a chunk of a packet, a small block, Give the small piece a margin-top (the margin-top of the child element is passed to the parent)

      Resolution: 1 Add a border to the parent

      ???????????????????????? 2,: Add a float to the child

      ???????????????????? 3; padding????

???? 2,margin collapse (the upper and lower margin of adjacent two elements overlap)

1. margin:0 auto/text-align-center Differences:
   1. For text, the picture is centered horizontally, with Text-align-center
   2. Center The Block element horizontally, with margin:0 auto (provided that the element has a width)

4.28 Main Contents