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Header tag sizing properties

<body>
   <header height="100px" width="100px">
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if i use the height and width with img it works but why wont it work on header tag?

The dimension attributes are designed to allow a website to specify what size an external resource is so a placeholder can be provided before it loads.

A header element doesn't load an external resource.


If you want to specify the dimensions of an element for layout, you can use CSS , which was introduced in 1996.

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