Doctype

Doctype is a first element in HTML documents. It tells browsers which version of HTML to use. Doctype is optional. By default browser will use HTML 5 as a document type. Of course if you have a browser that was published before HTML 5, then this browser will not support HTML 5 specific format.

However if you have a browser that old then you probably have all sort of issues browsing the Internet.

DOCTYPE had not seen any new updates for a while.

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