Array Buffer to Base64 Encoding

JavaScript Library to convert Array Buffer to Base64 encoded string and vice versa. This library is an useful add-on for cryptographic project, network project, and more.
There is no dependency for this project, and it works in both Node and Browser environment.

Node.js (Install)

Requirements:

• Node.js (version 8 or above. Need ES6 async/await and typed array)
• NPM

npm install ab2b64

Usage

    const ab2b64 = require("ab2b64");
    //Converting Array Buffer to Base64 String - Synchronous method
    let Base64String = ab2b64.ab2b64(buffer);
    
    //Converting Base64 String to Array Buffer - Synchronous method
    let buffer = ab2b64.b642ab(Base64String);
    
    //Converting Array Buffer to Base64 String - Asynchronous method
    let Base64String = await ab2b64.ab2b64Async(buffer);
        
    //Converting Base64 String to Array Buffer - Asynchronous method
    let buffer = await ab2b64.b642abAsync(Base64String);

Q&A

Q: Why this library needs node version 8 or above?

A: Specifically, this library requires async/await and typed array feature from ES2015. Any node or browser version supporting these two will suffice. Async/await is much less important as it only served as wrapper for async call. You can fork your own on github and rewrite the async/await portion.
However, the typed array feature is a must as typed array is used heavily.

Q: Why not just use the Base64 conversion feature in more established library, like Crypto-JS?

A: As of the writing of this library, I can't find one on NPM that converts Array Buffer to Base64. Crypto-JS converts specialized 'Word Array', not Array Buffer.

Q: Your library is garbage! I don't like it!

A: Then you open PR and improve it! Or don't use it! Nobody is begging you here...
Look, I get it. This library isn't super optimized. It is optimized enough for my project, and I published this on NPM so others may take advantage of my works.
I know some people (like those working in G-Company) love writing highly optimized but long and cryptic codes without documentation.
I prefer codes that can be easily and quickly understood by teammate of different experience levels so they can contribute quickly.