Methods to format masks in javascript, the second one is more generic to be implemented in any language

masks.js

/*
  * the first implementation is simpler but not much smart because, if a pattern long than value is passed
  * to function all remaining pattern will be write to outputValue and not crop immediately
  * for all purposes use second function, the first one is only a option more compact for understanding 
*/
function makeString(value, pattern) {
  let position = 0
  return pattern.replace(/#/g, () => {
    if(position >= value.length) {
      return ''
    }
    
    return value[position++]
  })
}


function makeString(value, pattern) {
  let positionValue = 0
  let outputValue = ''

  for(const i of pattern) {
    if(positionValue >= value.length) {
        break
    }
    if(i === '#') {
        outputValue += value[positionValue++] 
    } else {
      outputValue += i
    }
  }
  return outputValue
}


makeString('5531993455698', '+## (##) #####-####')
// '+55 (31) 99345-5698'

makeString('123077', '###.###.###-##')
// '123.077'

makeString('12307775488', '###.###.###-##')
// '123.077.754-88'