CODEWITHSUNDEEP
regex
Robula
Robula

Reputation: 716

Regex for Time HH:MM

I'm looking for a regex string for validating time. I validate my HTML form using ^([0-9]|0[0-9]|1[0-9]|2[0-3]):[0-5][0-9]$ which works great however I wish to create some sort of input mask for time entry on my HTML text input field which I'll attach to a keydown event to test the input as the user types.

Accepted Values

Upvotes: 0

Views: 3942

Answers (1)

nzrp
nzrp

Reputation: 152

Input mask for time with partial check

<input type="text" id="timeinput" name="time" value="" onkeyup="validateTime(this);"/>
<span id="validationresult"></span>
<script>
function validateTime(el)
{
    var result;
    // first, check if input is fully correct
    if (el.value.match(/^([0-9]|0[0-9]|1[0-9]|2[0-3]):[0-5][0-9]$/))
        result = "OK";
    // then, check if it is not wrong
    else if (el.value.match(/^([0-9]|0[0-9]|1[0-9]|2[0-3])?(:([0-5]|[0-5][0-9])?)?$/))
        result=""; // don't bother user with excess messages
    else
        result="Please, correct your input";
    document.getElementById("validationresult").innerHTML=result;
}
</script>

Feel free to optimize extra match, but here you can see difference between 2 expressions.

Upvotes: 2

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