width

about width :

• width attribute specifies the width of a horizontal line, in pixels or percent.
• width attribute of the body element was deprecated in HTML 4.01 and is not supported in XHTML 1.0 Strict DTD.

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width usage :

<"element" width="value">

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width value :

1. pixels : The width in pixels (like "100px" or just "100")
2. % : The width in percent of the available space (like "50%")

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width example:

<hr width="50%" />

origin by : w3schools.com