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In JS, the regular expression verifies the hour and minute, and converts the input string to the corresponding hour and minute

2022-06-24 07:12:00 【For notes】

List of articles

1、 Preliminary knowledge

splict() Method
Date() Related methods
setHours() Usage of

2、 stay js Code snippet in

   // Verify hours and minutes 
    var reDateTime = /^(?:(?:[0-2][0-3])|(?:[0-1][0-9])):[0-5][0-9]$/;
    var isDateTime = reDateTime.test('18:00');
    console.log(isDateTime)

    var startTime = "09:00";
    var endTime = "18:00";
    var t1 = new Date();
    let start = startTime.split(":") ;
    t1.setHours(start[0],start[1],0);
    console.log(" Starting time :"+t1)

    var t2 = new Date();
    let end = endTime.split(":");
    t2.setHours(end[0],end[1],0); 
    console.log(" End time ："+t2)
    if(t1.getTime() > t2.getTime()){
        console.log(" error ");
    }else if(t1.getTime() == t2.getTime()){
          console.log(" equal ")
    }else{
        console.log(" correct ")
    }