Using Symbol.toPrimitive and toJSON method for better code

byte.js

class Byte {
  #value

  constructor(value = 0) {
    this.#value = value
  }

  toJSON() {
    return this.#value
  }

  [Symbol.toPrimitive](hint) {
    if (hint === 'number')
      return this.#value
    else
      return this.#format(this.#value)
  }

  #format(value) {
    const sizes = ['B', 'KB', 'MB', 'GB', 'TB']
    if (value == 0) return '0 B'
    var i = parseInt(Math.floor(Math.log(value) / Math.log(1024)))
    return Math.round(value / Math.pow(1024, i), 2) + ' ' + sizes[i]
  }
}


const value = new Byte(102_400)
console.log(+value)          // 102400
console.log(`${value}`)	    // 100 KB
console.log(value < 102_500)	// true
console.log(value > 102_500)		// false
console.log(JSON.stringify(value)) // 102400

console.log([
  new Byte(300),
  new Byte(14_250_000),
  new Byte(10_000),
  new Byte(200)
].sort((f, s) => f - s).join(' | '))