var trigger = "2",
regexp = new RegExp('^[1-9]\d{0,2}$'),
test = regexp.test(trigger);
alert(test + ""); // will display trueconst regex_alphanumeric = /^[a-zA-Z\d]*$/;
console.log(regex_alphanumeric.test('a'));
console.log(regex_alphanumeric.test('1'));
console.log(regex_alphanumeric.test('!'));type MarkerTime =`${number| ''}${number}:${number}${number}`
let a: MarkerTime = "0-00" // error
let b: MarkerTime = "0:00" // ok
let c: MarkerTime = "09:00" // ok