如何使用JavaScript验证小数点的时间？

Question

User input time in the decimal format.

like

• 0.00 //Incorrect
• 1.54 //Correct value
• 1.60 //Incorrect value
• 1.59 //correct value

I have tried to make a regular expression function but it is showing incorrect for all values

var regex = /^[0-9]\d*(((,?:[1-5]\d{3}){1})?(\.?:[0-9]\d{0,2})?)$/;
 if (args.Value != null || args.Value != "") {
    if (regex.test(args.Value)) {
        //Input is valid, check the number of decimal places
        var twoDecimalPlaces = /\.\?:[1-5]\d{2}$/g;
        var oneDecimalPlace = /\.\?:[0-9]\d{1}$/g;
        var noDecimalPlacesWithDecimal = /\.\d{0}$/g;

        if (args.Value.match(twoDecimalPlaces)) {

            //all good, return as is
            args.IsValid = true;
            return;
        }
        if (args.Value.match(noDecimalPlacesWithDecimal)) {
            //add two decimal places
            args.Value = args.Value + '00';
            args.IsValid = true;
            return;
        }
        if (args.Value.match(oneDecimalPlace)) {
            //ad one decimal place
            args.Value = args.Value + '0';
            args.IsValid = true;
            return;
        }
        //else there is no decimal places and no decimal
        args.Value = args.Value + ".00";
        args.IsValid = true;
        return;
    } else
        args.IsValid = false;
} else
    args.IsValid = false;

Answer 1

It's probably easier to do working with a number:

var time = (+args.Value).toFixed(2); // convert to float with 2 decimal places
if (time === args.Value) {
    // it's a valid number format
    if (time !== 0.0 && time < 24) {
        // the hours are valid
        if (time % 1 < 0.6) {
            // the minutes are valid
        }
    }
}

You can collapse all that up into a nice one-liner:

if (time === args.Value && time !== 0.0 && time < 24 && time % 1 < 0.6) {
}

and even a boolean/ternary

var valid = time === args.Value && time !== 0.0 && time < 24 && time % 1 < 0.6;
alert( time === args.Value && time !== 0.0 && time < 24 && time % 1 < 0.6 ? 'valid' : 'invalid' );