Is it acceptable to apply both Left: 0 and Right: 0 to a single element?

While I am familiar with the concept of using left: and right: positioning to place an element within its parent container, I came across a website recently where many elements had both properties set to 0.

For example:

div {
width: 200px;
height: 200px;
position: fixed;
top: 0;
left: 0;
right: 0;
}

This was observed in several instances of fixed and relative positioned <div>s on the site. Can you really fix a <div> so that it is positioned at zero for both left and right? If this is valid CSS, could someone please explain its purpose?

Thank you,

Emily

htmlcssposition

Answer №1

Absolutely, this CSS code is perfectly valid. It's specifically designed to center absolute positioning divs on a webpage. Just don't forget to include the margin: auto; property along with it. Take a look at this practical demonstration:

div {
  position: absolute;
  margin: auto;
  right: 0;
  left: 0;
  height: 100px;
  width: 100px;
  background: red;
}
<div></div>

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