Limit number of characters in input type number

Question

Im trying to limit to X number the characters in a input (type of number). ive tried a lot of options and none seems to work. I dont want to use the option tel as it needs t

Answer 1

The HTML5 number type input has min and max attributes.

If you wanted to limit the number of characters to 1 you could set a min of 0 and a max of 9.

You can also set the step attribute, which is 1 by default, but would come in use if you wanted the ability to select decimals or other rounded numbers.

<input type="number" maxlength="1" max="9" min="1" size="1" />

Here's the full demo

Answer 2

please review this code

<script language="javascript" type="text/javascript">
function limitText(limitField, limitCount, limitNum) {
    if (limitField.value.length > limitNum) {
        limitField.value = limitField.value.substring(0, limitNum);
    } else {
        limitCount.value = limitNum - limitField.value.length;
    }
}
</script>

<form name="myform">
<input name="limitedtextfield" type="text" onKeyDown="limitText(this.form.limitedtextfield,this.form.countdown,15);" 
onKeyUp="limitText(this.form.limitedtextfield,this.form.countdown,15);" maxlength="15"><br>
<font size="1">(Maximum characters: 15)<br>
You have <input readonly type="text" name="countdown" size="3" value="15"> characters left.</font>
</form>

Answer 3

Note: charCode is non-standard and deprecated, whereas keyCode is simply deprecated.

Check this code

JavaScript

<script>
function check(e,value)
{
    //Check Charater
    var unicode=e.charCode? e.charCode : e.keyCode;
    if (value.indexOf(".") != -1)if( unicode == 46 )return false;
    if (unicode!=8)if((unicode<48||unicode>57)&&unicode!=46)return false;
}
function checkLength()
{
    var fieldLength = document.getElementById('txtF').value.length;
    //Suppose u want 4 number of character
    if(fieldLength <= 4){
        return true;
    }
    else
    {
        var str = document.getElementById('txtF').value;
        str = str.substring(0, str.length - 1);
        document.getElementById('txtF').value = str;
    }
}

and HTML input with number type below

onInput //Is fired also if value change from the side arrows of field in Chrome browser

<input id="txtF" type="number" onKeyPress="return check(event,value)" onInput="checkLength()" />

Fiddle Demo

Update -- Little bit generic code example

Change above function into this one

function checkLength(len,ele){
  var fieldLength = ele.value.length;
  if(fieldLength <= len){
    return true;
  }
  else
  {
    var str = ele.value;
    str = str.substring(0, str.length - 1);
    ele.value = str;
  }
}

In HTML use like this

<!-- length 4 -->    
<input id="txtF" type="number" onKeyPress="return check(event,value)" onInput="checkLength(4,this)" />
<!-- length 5 -->    
<input  type="number" onKeyPress="return check(event,value)" onInput="checkLength(5,this)" />
<!-- length 2 -->    
<input  type="number" onKeyPress="return check(event,value)" onInput="checkLength(2,this)" />

Demo

Answer 4

You can easily do it like this,

<input type="text" pattern="\d*" maxlength="4">

Answer 5

Use the maxlength property like this.

<input type="text" maxlength="5"/>

Answer 6

You can try thiss jQuery code :

In HTML

<input type="number" id="number" />

In JS

$(document).ready(function () {
    var element = document.getElementById('number');

    $("#number").keydown(function (event) {
        // Allow only backspace and delete

        if($(this).val().length <= 9 || event.keyCode == 46 || event.keyCode == 8 || event.keyCode == 9 )
        {
            if (event.keyCode == 46 || event.keyCode == 8 || event.keyCode == 9) {
                // let it happen, don't do anything
            } else {
                // Ensure that it is a number and stop the keypress
                if ((event.keyCode < 48 || event.keyCode > 57) && (event.keyCode < 96 || event.keyCode > 105)) {
                    event.preventDefault();
                }
            }
        }else{

            event.preventDefault();
        }          

    });


});

I have not any idea wheather its working on IOS N Android but its work on all browser.

DEMO