How to realize the centering of css elements by absolute positioning and fixed positioning of HTML
Most people do not understand the knowledge points of this article "how to achieve the center of css elements through the absolute positioning and fixed positioning of HTML", so the editor summarizes the following contents for you. The content is detailed, the steps are clear, and it has a certain reference value. I hope you can gain something after reading this article. Let's take a look at this article entitled "how to center css elements through absolute and fixed positioning of HTML".
The method is relatively simple, using not just one wrapper element, but two elements.
HTML:
Somecontent
CSS:
.popup {
Position:fixed
Left:50%
}
This CSS centers the left side of the element to the center of the window, but we want the mode box to be centered based on the middle position of the element.
Now let's look at the technical approach, because we have two wrappers for the pop-up window, so we can manipulate the internal div and tell div to move to the left by a relative value of-50%, and because it is in the container, the div will move only half the size to the left. That's how we put the modal boxes together.
Add CSS
.popup.wrapper {
Position:relative
Left:-50%
}
Then our element is placed in the horizontal center, realizing the center of the element.
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