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CSS 'Left' Property not Aligning as Expected
When applying the "left: 50%" property to position a child element within a parent element, you may encounter cases where the child element does not align as expected. This discrepancy occurs because CSS positioning operates based on specific criteria.
Understanding Positioning in CSS
In the provided code snippet, you've specified CSS styles for two divs, "outher" (parent) and "inner" (child). The CSS for the child div includes "left: 50%", hoping to center the child's left border within the parent div. However, this approach fails due to a missing property: "position."
Adding 'Position' Property
For the "left" property to take effect, you must define the "position" property for the child div. This property specifies the positioning behavior of an element. You have two main options:
Revised Code Snippet
By adding the "position: absolute;" property to the child div, you can ensure that the "left: 50%" property will center the child's left border within the parent div.
#inner { position: absolute; left: 50%; }
Demo for Visual Confirmation
Refer to the updated demo at http://jsfiddle.net/vrse2/6/ to see how the modified CSS centers the child div within the parent div as intended.
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