contentHashGenerator generates a short number hash from the string

contentHashGenerator.js

const contentHashGenerator = (str = '') => {
  let hash = 0;
  let i;
  let chr;
  if (str.length === 0) return hash;
  for (i = 0; i < str.length; i++) {
    chr = str.charCodeAt(i);
    // eslint-disable-next-line
    hash = ((hash << 5) - hash) + chr;
    // eslint-disable-next-line
    hash |= 0;
  }
  return hash;
};