Don't allow typing alphabetic characters in a <input type=number />

Question

I need to have a textbox, where, whenever typed inside should ONLY allow numbers [0-9]. I\'ve used type=\"number\" which definitely holds the client side valida

Answer 1

input type="number" for getting Numeric Keyboard on Mobile Device

Java-Script

function numbersonly(myfield, e)
        {
            var key;
            var keychar;

            if (window.event)
                key = window.event.keyCode;
            else if (e)
                key = e.which;
            else
                return true;

            keychar = String.fromCharCode(key);

            // control keys
            if ((key==null) || (key==0) || (key==8) || (key==9) || (key==13) || (key==27) )
                return true;

            // numbers
            else if ((("0123456789").indexOf(keychar) > -1))
                return true;

            // only one decimal point
            else if ((keychar == "."))
            {
                if (myfield.value.indexOf(keychar) > -1)
                    return false;
            }
            else
                return false;
        }

Html

<input type="number" onkeypress="return numbersonly(this, event)"/>

Answer 2

You can use jquery.numeric plugin.

See here similar question.

$(document).ready(function(){
   $(".numeric").numeric();
});

Answer 3

If you don't mind using a bit of Javascript, this might help JS-BIN Demo:

<input type="number" onkeyup="if(!this.checkValidity()){this.value='';alert('Please enter a number')};"/>

Answer 4

Try this

define javascript function

function for allowed number with decimal as below

function isNumberKey(evt) {
    var charCode = (evt.which) ? evt.which : event.keyCode;
    if (charCode != 46 && charCode > 31
    && (charCode < 48 || charCode > 57))
        return false;

    return true;
}

function for allowed only number not decimal is as below

function isNumberKey(evt) {
    var charCode = (evt.which) ? evt.which : event.keyCode;
    if ((charCode < 48 || charCode > 57))
        return false;

    return true;
}

Html

<input type="number" id="txt_number" maxlength="70" name="txt_name" placeholder="Number" onkeypress="return isNumberKey(event)">

Answer 5

I notice that the question was posted around 2013. Anyways, now type="number" is restricting alphabets and special characters other that 'e','.' and '+' as 'e' and '.' are considered for exponential numbers like 1.2e+12, '.' is considered for decimal numbers.

Answer 6

just add - min="0" max="9" onkeydown="return false;"

<input type="number" id="txt_number" maxlength="70" name="txt_name" placeholder="Number" min="0" max="9" onkeydown="return false;">