Well, you can use `innerHTML` and a string, but you don't have to.

But there several alternatives:

1. Use DOM APIs (createElement).

2. Fetch the HTML as a separate resource.

3. Have the HTML in a separate file and bundle it with a bundler.

4. Use React/JSX.

5. Use a preferred templating library of your choice.

You can do whichever of these you like the most