splitMult.js

console.clear()


const string = '\'1\'  ,   2  , \'3\'';



const splitMult = (s, splits, r = []) => {
  if (!s) return r

  if (splits.length) {
    const [part, ...others] = splits

    const [before, after] = s.split(part)

    r.push(before)


    if (s.split(part).length) {
      r.push(part)
    }

    return splitMult(after, others, r)
  }

  r.push(s)

  return r
}


const cleanSpace = s => {
  const stringBlocks = s.match(/("|').*?("|')/g);

  
  const parts = splitMult(s, stringBlocks)
  
  
  return parts.filter(s => s.length).map(d => {
    if (!d.match(/("|').*?("|')/g)) {
      return d.split(',').map(f => f.trim()).join(', ')
    }
    
    return d;
  }).join('');
} 



console.log(splitMult(string, ['"1"', '"3"']))


console.log(cleanSpace(string))