Function parseNumberAttrVal

test/angular/1.5/angular.js:24727–24732

(val)

}

function parseNumberAttrVal(val) {
  if (isDefined(val) && !isNumber(val)) {
    val = parseFloat(val);
  }
  return !isNumberNaN(val) ? val : undefined;
}

function isNumberInteger(num) {
  // See http://stackoverflow.com/questions/14636536/how-to-check-if-a-variable-is-an-integer-in-javascript#14794066