Simple base45 (charset of Qr codes, alphanumeric mode) encoder/decoder.
Run as 'npm test' to get an idea of what it does.
Typical use:
const b45 = require("base45-js");
const e = b45.encode(Buffer.from('Hello!','utf-8'))
console.log(e); // Will output %69 VD92EX0"
const d = b45.decode('%69 VD92EX0')
console.log(d); // will output '[72, 101, 108, 108, 111, 33, 33]'
const d = b45.decodeToUtf8String('%69 VD92EX0')
console.log(d); // will output 'Hello!'