How to parse a date in format “YYYYmmdd” in JavaScript?

Question

This is a noob question:

How to parse a date in format \"YYYYmmdd\" without external libraries ? If the input string is not in this format I would like

Answer 1

Example using only the digits in the string:

function toDate(str) {
  var m = str.split(/\D/);
  return new Date(+m[0], +m[1] - 1, +m[2], +m[3], +m[4], +m[5]);
}
    
console.log(toDate("2020-08-23 23:34:45"));