user3380148 user3380148 - 5 days ago 8
CSS Question

Is it possible to create html tags h7, h8, h9 and so on

Here's a novice question. Is it possible to create more heading styles like h7, h8, and so on. I am just wondering if it possible to have more than 6 different types of headings on a website.

Answer

You can create any element you want on a page, but I think your question is whether it will be interpreted correctly by a user agent like a browser. Browsers will allow you to create, apply styles to, and access arbitrarily-created elements on the DOM regardless of whether they conform to the spec implied by your declared DOCTYPE.

However, in general, it's best to avoid creating deeply nested structures; humans find such hierarchies difficult to follow. In addition, as other answers linked in the comments have pointed out, there may be unintended consequences with page accessibility, SEO, or script compatibility. I have yet to find a use case that actually needs such deeply nested hierarchies, except when posting really long legal documents as a single HTML page.

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