lesson 14 NFT lesson Basic questions

[TimeKeyRoll]

Hi I have a couple of questions about NFT dynamic Contract. Anyone who thinks they can help me to understand it they are welcome to answer/comment.

Question- I want to know if they are a part of JavaScript or where they are coming from? Or they are just called Prefix and part of any language?
"data:image/svg+xml;base64,"; and "data:application/json;base64,".

Question- We are using _baseURI function and returning it return "data:application/json;base64,";
And Adding this function to tokenURI for concatenating the Images but this is for json file as name suggests but not for images. I really don't understand how this is helping us to get images in tokenURI?

Question- In function tokenURI we are changing our abi.encodePacked data to bytes before changing it to base64. why can't we straight change our data into base64 why do we need to change it first at bytes first?

Question- I have compiled the contract and have forgot to store image and metaDataURI. I want to testcontract` and have not any URI's with me. how do i re-get that ?

[TimeKeyRoll]

@abossofmyself You think you could help me with this explanation please? would highly appreciated.

[krakxn]

@TimeKeyRoll

Q1

A simple explanation from StackOverflow (basically, we are decoding and then parsing to JSON--primarily used for URI):

A technical, elaborate specification from docs:

https://jb64.org/specification/

Q2 and Q3

Relevant code snippet please.

Q4

This requires a separate discussion for relevance and involves debugging.

[TimeKeyRoll]

@krakxn No I was asking a different question but thankyou.

I mean I am talking about features of the contract! Not sure what you want in snippet? its the dynamic contract which Patrick has taught us in the Video.
link:https://github.com/TimeKeyRoll/learn-nft

AND @krakxn how do i get the images and metadata URI after the compilation is done? AND what debuggin it involves?