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How to validate with Javascript an Input text with Hours and Minutes

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灰色年华
灰色年华 2020-12-28 13:49

I have to build an HTML Form with an Input text field for Hours and Minutes.
Something like:

Name : [Foo]
Surname

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8条回答
  • 挽巷
    2020-12-28 13:57

    With moment.js the way is:

    const time = '23:59'
moment(time, 'HH:mm', true).isValid()
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  • 名媛妹妹
    2020-12-28 14:00

    The RegExp from the first answer doesn't match the OP's query correctly.

    ^([0-1]?[0-9]|2[0-4]):([0-5][0-9])(:[0-5][0-9])?$

    Should be

    ^([0-1][0-9]|2[0-3]):([0-5][0-9])$

    Matches 00-19 or 20-23 : 00-59

    OP requested validation of HH:MM in the range 00:00 - 23:59

    No seconds. 24:00 should not be valid. Double digits for input of hour and minute.

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  • 星月不相逢
    2020-12-28 14:00

    How about

    function validTime(inputStr) {
    if (!inputStr || inputStr.length<1) {return false;}
    var time = inputStr.split(':');
    return time.length === 2 
           && parseInt(time[0],10)>=0 
           && parseInt(time[0],10)<=23 
           && parseInt(time[1],10)>=0 
           && parseInt(time[1],10)<=59;
}
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  • 生来不讨喜
    2020-12-28 14:03

    might not be the best but this works for me. i am returning false if there is no error in this case. checks for both format and values.

    if (value.substr(2,1) === ':') {
    if (!value.match(/^\d\d:\d\d/)) {
        return "Invalid Format";
    }
    else if (parseInt(value.substr(0,2)) >= 24 || parseInt(value.substr(3,2)) >= 60)  {
        return "Invalid Format";
    }
    else {
        return false;
    }

}
else {
    return "Invalid Format";
}
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  • 遇见更好的自我
    2020-12-28 14:10 
    <HTML>
<Head>
<script language="javascript">
function validateTime(obj)
{
    var timeValue = obj.value;
    if(timeValue == "" || timeValue.indexOf(":")<0)
    {
        alert("Invalid Time format");
        return false;
    }
    else
    {
        var sHours = timeValue.split(':')[0];
        var sMinutes = timeValue.split(':')[1];

        if(sHours == "" || isNaN(sHours) || parseInt(sHours)>23)
        {
            alert("Invalid Time format");
            return false;
        }
        else if(parseInt(sHours) == 0)
            sHours = "00";
        else if (sHours <10)
            sHours = "0"+sHours;

        if(sMinutes == "" || isNaN(sMinutes) || parseInt(sMinutes)>59)
        {
            alert("Invalid Time format");
            return false;
        }
        else if(parseInt(sMinutes) == 0)
            sMinutes = "00";
        else if (sMinutes <10)
            sMinutes = "0"+sMinutes;    

        obj.value = sHours + ":" + sMinutes;        
    }

    return true;    
}


</script>
</Head>
<Body>
<input type="text" onblur="validateTime(this)">
</Body>
</HTML>
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  • 小蘑菇
    2020-12-28 14:14

    Either with the following regular expression :

    ^([0-1]?[0-9]|2[0-4]):([0-5][0-9])(:[0-5][0-9])?$

    Or by hand, but I strongly suggest the RegExp :) A simple example :

    function validateHhMm(inputField) {
    var isValid = /^([0-1]?[0-9]|2[0-4]):([0-5][0-9])(:[0-5][0-9])?$/.test(inputField.value);

    if (isValid) {
      inputField.style.backgroundColor = '#bfa';
    } else {
      inputField.style.backgroundColor = '#fba';
    }

    return isValid;
  }
    <input type="text" onchange="validateHhMm(this);" />

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