javascript - Making child element have same width and border as parent -


For example, I have a "li" tag that has an "A" tag inside it, Bottom: 1 px solid # ccc; 

  & lt; Li class = sub ">  & lt; / A & gt; & lt; / li & gt;

Currently I have 

  Duration {width: 90%; Border-bottom: 1 Px solid # ccc; font-size: 12px;} li {width: 100%;}

But it seems that underline text only, I would like to "take" that one Underlines the entire line, but the "Span" tag on "Li" did not write down, so basically my "Span" "Le" is not sure what I am missing on my CSS.

You should understand that span is an inline element , and there is no such thing as width to do that span is for passing the width, you need to make sure that you set display to a block in the K element , Your matters In, try inline-block .

Live example:


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