how to extract number from string in js code example

Example 1: js get number from string

thenum = "foo3bar5".match(/\d+/)[0] // "3"

Example 2: javascript find a digit in str

var regex = /\d+/g;
var string = "Any string you want!";
var matches = string.match(regex);  // creates array from matches

if (matches){
  // There is a digit in the string.
} else {
  // No Digits found in the string.
}