js check how many digits in a number code example

Example 1: digit count in javascript

function digitCount(num) {
  if(num === 0 ) return 1
  return Math.floor(Math.log10(Math.abs(num))) + 1
}

Example 2: get number right of the dot length javascript

var x = 23.453453453;
x.countDecimals(); // 9

var countDecimals = function (value) {
    if(Math.floor(value) === value) return 0;
    return value.toString().split(".")[1].length || 0; 
}