Introduction to Doctypes.

Doctypes - short for 'document type' - help browsers to understand the version of HTML the document is written in for better interpretability. Doctype declarations are not HTML tags and belong at the very top of a document. This topic explains the structure and declaration of various doctypes in HTML.

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📄️ Adding the Doctype

The ` declaration should always be included at the top of the HTML document, before the ` tag.

📄️ HTML 5 Doctype

HTML5 is not based on SGML, and therefore does not require a reference to a DTD.

📄️ Remarks

The `` declaration is not an HTML tag. It is used for specifying which version of HTML the document is using. This is referred to as the document type declaration (DTD).