Javascript implements vertical and horizontal center in a specified element _ javascript skills

Source: Internet
Author: User
When talking about the layout of webpages, the center problem has not been effectively solved. The center problem is usually relative to a certain element, for example, the screen center problem we often call, the more information we know about the parent element, the easier we can achieve center layout. Next, let's take a concrete example to see how javascript achieves vertical horizontal center. This chapter introduces how to implement an element with unknown width and height to achieve vertical horizontal center under a specified element, the following uses the span element as an example to describe how to implement the vertical center effect of the span element in p. The Code is as follows:

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