How to set a layer to center left and right, up and down, horizontally and vertically in the browser

This article introduces the knowledge of "how to set a layer in the browser to center horizontally and vertically at the same time". 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!

If you want to center a defined layer both left and right in the browser, you can use absolute positioning combined with percentage left, top attributes, and negative external patches.

The code is as follows:

Div {

Position:absolute

Top:50%

Left:50%

Margin:-100px 00-100px

Width:200px

Height:200px

Border:1px solid red

}

Note: the two-100px in the margin attribute are negative values of half of the values of the width and height attributes, respectively.

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