Built-In Modules

`assert`

`fs`

Browsers don't allow access to your computer's file system because otherwise malicious websites could delete your files, steal information or perform other malicious actions. It is possible to download or upload files via your browser but only through a secure interface where a user, not a script, decides to download or upload a file. JavaScript code in your browser has no access to files on your computer: it runs in a closed environment also known as a sandbox.

About encodings (why you need to add utf-8):

Characters, Symbols and the Unicode Miracle - Computerphile : https://www.youtube.com/watch?v=MijmeoH9LT4
Computer Stuff They Didn't Teach You #2 - Code Pages, Character Encoding, Unicode, UTF-8 and the BOM: https://www.youtube.com/watch?v=jeIBNn5Y5fI
No Such Thing As Plain Text: https://www.cqse.eu/en/blog/no-such-thing-as-plain-text/
The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!): https://www.joelonsoftware.com/2003/10/08/the-absolute-minimum-every-software-developer-absolutely-positively-must-know-about-unicode-and-character-sets-no-excuses/ Don't feel bad if this is hard to understand. Took me more than a year after I started working to really understand this

`http`