How to use only once

Question

How to use one elemnt (header,footer etc.) in every page?For example: I will write footer or header section on another html file...So it must be displayed for example in 50 pages.

Answer 1

There are lots of ways to accomplish this. I would select my approach depending on the type of content on these 50 pages as each approach has trade-offs to consider. What would be on your 50 pages, Fury?

Answer 2

news lifehacks etc.

Answer 3

You should use backend (in php, c#, java etc.) to generate dinamic pages, using the templates you have created. E.g. if your backend is written in php and you have made a header and saved it into file "header.php", you should put:
include 'header.php'
before the page main contents.