Doctype HTML html5 — The <!DOCTYPE> declaration must be the very first thing in your HTML document, before the <html> tag.The <!DOCTYPE> declaration is not an HTML tag; it is an instruction to the web browser about what version of HTML the page is written in.In HTML 4.01, the <!DOCTYPE> declaration refers to a DTD, because HTML 4.01 was based on SGML. The DTD specifies the rules for the markup language so that the browsers render the content correctly. HTML5 Doctype: — A Document Type Declaration, or DOCTYPE for short, is an instruction to the web browser about the version of the markup language in which a web page is written. An HTML5 DOCTYPE declaration appears at the top of a web page before all other elements.
Declaring a doctype HTML html5
All HTML needs to have a DOCTYPE declared. The DOCTYPE is not actually an element or HTML tag. It lets the browser know how the document should be interpreted, by indicating what version or standard of HTML (or other markup languages) is being used.
How to Declare doctype HTML html5
The DOCTYPE declaration comes before any other element in an HTML document. However, it is not a tag that implies that it will not be used to pass instructions user-defined instructions to a web browser. Instead, it prompts the browser about the version of HTML5 in which a web document is written to ensure that it is presented correctly. The Doctype Html5 is short:
All HTML needs to have a DOCTYPE declared. The DOCTYPE is not actually an element or HTML tag. It lets the browser know how the document should be interpreted, by indicating what version or standard of HTML (or other markup languages) is being used.
