The Magic of 'Auto' in CSS Margins
It's common knowledge that CSS margins determine the space around an element. But what if we use 'auto' as the value?
Understanding the Role of 'Auto'
When applied to the second parameter of margin, 'auto' empowers the browser with the responsibility of determining the left and right margins on its own. It achieves this by setting both margins equally.
Example: Centering Objects
Let's consider a scenario where we have a parent container with a width of 100px and a child element with a width of 50px. By using 'margin: 0 auto', the browser calculates the remaining space (50px) and splits it equally between the left and right margins.
This results in the following calculations:
freeSpace = 100 - 50 = 50 equalShare = freeSpace / 2 = 25
margin-left: 25 margin-right: 25
Consequently, the child element is centered within the parent container.
Additional Notes
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