make-me-a-ok-ish-hash.js

function mix(state, block){
    let select = block % 4
    let zero = state[0] + (state[select] * block) ^ state[state[select] % 4] << 3 | block >> 5
    let one = zero * (state[2] + state[3]) - state[1]
    let two  = (state[2] >> (zero % 10)) -  one
    let three = (state[3] ^ (two<<2)) ^ (state[select] >> 3)
    state = [zero , one, two, three].map(n => n & 0xffffffff)
	return state
}

function hash(data){
  let state = [0xffaaffbb, 0x7fffffff, 0xfabbaafb, 0x40f777a7] // MAGIC NUMBER
  for(let i=0;i<data.length; i+=4){
    // create 32 bit number from characters (block)
    let chars = data.slice(i, i+4)
    let block = (chars.charCodeAt(0) << 16) | (chars.charCodeAt(1) << 12) | (chars.charCodeAt(2) << 8) | chars.charCodeAt(3)
    state = mix(state, block)
  }
  return state.map(n => Math.abs(n).toString(16)).join('')
}

hash('please hash me')

// HELP FROM http://www.partow.net/programming/hashfunctions/#top