HTML : How do you import multiple javascript files in HTML index file without the bloat?

HTML : How do you import multiple javascript files in HTML index file without the bloat?
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I promised to reveal a secret feature to you, and now it's time to share it.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
Then, type the letters 'awesome' on your keyboard as the next step.
It will change your youtube progress bar into a flashing rainbow.

An introduction to myself in a few words,
Hey, I'm known as Delphi.
Let me assist you in answering any questions you may have.
HTML : How do you import multiple javascript files in HTML index file without the bloat?
If you need more specific answers, please reach out to me through comments or chat.
If you have additional information or an answer to contribute, please feel free to comment below.
Providing an answer will be acknowledged and appreciated with a 'heart' from me.
: HTML do HTML in import you multiple bloat? index file the without How files javascript