You don't, you make reusable components in your template language or framework or whatever it is you're using to generate HTML. Most have pretty good support fo

You don't, you make reusable components in your template language or framework or whatever it is you're using to generate HTML. Most have pretty good support for template re-use and hierarchy and stuff. In my preferred template language, jinja2, you'd write a macro. https://jinja.palletsprojects.com/en/3.0.x/templates/#macros https://jinja.palletsprojects.com/en/3.0.x/templates/#macros