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This article introduces the knowledge of "how to use css mdash". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Div is centered vertically and horizontally

1. Through table-cell (the percentage value of vertical-align is calculated relative to line-height)

.boxdiv {

Width:400px

Height:400px

Display:table-cell

Vertical-align:middle

Text-align:center

}

.boxdiv.div {

Width:200px

Height:200px

Display:inline-block

}

2.. Absolute positioning mode + set 0 in four directions (you need to set the width and height of the child element, otherwise the child element will be the same as the parent element)

.boxdiv {

Width:400px

Height:400px

Position:relative

}

.boxdiv.div {

Width:200px

Height:200px

Margin:auto

Position:absolute

Top:0;left:0;bottom:0;right:0

}

Offset div vertically by positioning + maring

.boxdiv {

Width:400px

Height:400px

Position:relative

}

.boxdiv.div {

Width:300px

Height:200px

Margin:auto

Position:absolute

Left:50%

Top:50%

Margin-left:-150px

Margin-top:-100px

}

That's all for "how to use css mdash". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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