Function isNumber

codebase/sources/dhtmlxscheduler.js:15710–15712

(value)

    return value !== null && value !== void 0;
  };
  var isNumber = function(value) {
    return typeof value === "number";
  };
  var isWeekdayStr = function(value) {
    return typeof value === "string" && ALL_WEEKDAYS.includes(value);
  };