# html – How can I limit possible inputs in a HTML5 “number” element?

## The Question :

384 people think this question is useful

For <input type="number"> element, maxlength is not working. How can I restrict the maxlength for that number element?

• For people looking a better solution, this one is best: stackoverflow.com/questions/9361193/…
• max attribute doesn’t work in chrome browser in android tablet.
• @ÜnsalKorkmaz: that solution has the disadvantage that it does not bring up the number keypad on android devices

365 people think this answer is useful

And you can add a max attribute that will specify the highest possible number that you may insert

<input type="number" max="999" />



if you add both a max and a min value you can specify the range of allowed values:

<input type="number" min="1" max="999" />



The above will still not stop a user from manually entering a value outside of the specified range. Instead he will be displayed a popup telling him to enter a value within this range upon submitting the form as shown in this screenshot:

122 people think this answer is useful

You can specify the min and max attributes, which will allow input only within a specific range.

<!-- equivalent to maxlength=4 -->
<input type="number" min="-9999" max="9999">



This only works for the spinner control buttons, however. Although the user may be able to type a number greater than the allowed max, the form will not submit.

Screenshot taken from Chrome 15

You can use the HTML5 oninput event in JavaScript to limit the number of characters:

myInput.oninput = function () {
if (this.value.length > 4) {
this.value = this.value.slice(0,4);
}
}



87 people think this answer is useful

If you are looking for a Mobile Web solution in which you wish your user to see a number pad rather than a full text keyboard. Use type=”tel”. It will work with maxlength which saves you from creating extra javascript.

Max and Min will still allow the user to Type in numbers in excess of max and min, which is not optimal.

79 people think this answer is useful

You can combine all of these like this:

<input name="myinput_drs"
oninput="maxLengthCheck(this)"
type = "number"
maxlength = "3"
min = "1"
max = "999" />

<script>
// This is an old version, for a more recent version look at
// https://jsfiddle.net/DRSDavidSoft/zb4ft1qq/2/
function maxLengthCheck(object)
{
if (object.value.length > object.maxLength)
object.value = object.value.slice(0, object.maxLength)
}
</script>



Update:
You might also want to prevent any non-numeric characters to be entered, because object.length would be an empty string for the number inputs, and therefore its length would be 0. Thus the maxLengthCheck function won’t work.

Solution:
See this or this for examples.

Demo – See the full version of the code here:
http://jsfiddle.net/DRSDavidSoft/zb4ft1qq/1/

Update 2: Here’s the update code: https://jsfiddle.net/DRSDavidSoft/zb4ft1qq/2/

Update 3: Please note that allowing more than a decimal point to be entered can mess up with the numeral value.

29 people think this answer is useful

it’s very simple, with some javascript you can simulate a maxlength, check it out:

//maxlength="2"
<input type="number" onKeyDown="if(this.value.length==2) return false;" />



26 people think this answer is useful

Or if your max value is for example 99 and minimum 0, you can add this to input element (your value will be rewrited by your max value etc.)

<input type="number" min="0" max="99"
onKeyUp="if(this.value>99){this.value='99';}else if(this.value<0){this.value='0';}"
id="yourid">



Then (if you want), you could check if is input really number

18 people think this answer is useful

You can specify it as text, but add pettern, that match numbers only:

<input type="text" pattern="\d*" maxlength="2">



It works perfect and also on mobile ( tested on iOS 8 and Android ) pops out the number keyboard.

14 people think this answer is useful

//For Angular I have attached following snippet.

<div ng-app="">
<form>
Enter number: <input type="number" ng-model="number" onKeyPress="if(this.value.length==7) return false;" min="0">
</form>
<h1>You entered: {{number}}</h1>
</div>


If you use “onkeypress” event then you will not get any user limitations as such while developing ( unit test it). And if you have requirement that do not allow user to enter after particular limit, take a look of this code and try once.

13 people think this answer is useful

Lets say you wanted the maximum allowed value to be 1000 – either typed or with the spinner.

You restrict the spinner values using: type="number" min="0" max="1000"

and restrict what is typed by the keyboard with javascript: onkeyup="if(parseInt(this.value)>1000){ this.value =1000; return false; }

<input type="number" min="0" max="1000" onkeyup="if(parseInt(this.value)>1000){ this.value =1000; return false; }">



12 people think this answer is useful

Another option is to just add a listener for anything with the maxlength attribute and add the slice value to that. Assuming the user doesn’t want to use a function inside every event related to the input. Here’s a code snippet. Ignore the CSS and HTML code, the JavaScript is what matters.

// Reusable Function to Enforce MaxLength
function enforce_maxlength(event) {
var t = event.target;
if (t.hasAttribute('maxlength')) {
t.value = t.value.slice(0, t.getAttribute('maxlength'));
}
}

// Global Listener for anything with an maxlength attribute.
// I put the listener on the body, put it on whatever.

label { margin: 10px; font-size: 16px; display: block }
input { margin: 0 10px 10px; padding: 5px; font-size: 24px; width: 100px }
span { margin: 0 10px 10px; display: block; font-size: 12px; color: #666 }

<label for="test_input">Text Input</label>
<input id="test_input" type="text" maxlength="5"/>
<span>set to 5 maxlength</span>

<br>

<label for="test_input">Number Input</label>
<input id="test_input" type="number" min="0" max="99" maxlength="2"/>
<span>set to 2 maxlength, min 0 and max 99</span>


11 people think this answer is useful

Max length will not work with <input type="number" the best way i know is to use oninput event to limit the maxlength. Please see the below code for simple implementation.

<input name="somename"
oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);"
type = "number"
maxlength = "6"
/>



8 people think this answer is useful

As stated by others, min/max is not the same as maxlength because people could still enter a float that would be larger than the maximum string length that you intended. To truly emulate the maxlength attribute, you can do something like this in a pinch (this is equivalent to maxlength=”16″):

<input type="number" oninput="if(value.length>16)value=value.slice(0,16)">



7 people think this answer is useful

I had this problem before and I solved it using a combination of html5 number type and jQuery.

<input maxlength="2" min="0" max="59" name="minutes" value="0" type="number"/>



script:

$("input[name='minutes']").on('keyup keypress blur change', function(e) { //return false if not 0-9 if (e.which != 8 &amp;&amp; e.which != 0 &amp;&amp; (e.which < 48 || e.which > 57)) { return false; }else{ //limit length but allow backspace so that you can still delete the numbers. if($(this).val().length >= parseInt($(this).attr('maxlength')) &amp;&amp; (e.which != 8 &amp;&amp; e.which != 0)){ return false; } } });  I don’t know if the events are a bit overkill but it solved my problem. JSfiddle ## The Answer 14 6 people think this answer is useful Maycow Moura’s answer was a good start. However, his solution means that when you enter the second digit all editing of the field stops. So you cannot change values or delete any characters. The following code stops at 2, but allows editing to continue; //MaxLength 2 onKeyDown="if(this.value.length==2) this.value = this.value.slice(0, - 1);"  ## The Answer 15 6 people think this answer is useful a simple way to set maxlength for number inputs is: <input type="number" onkeypress="return this.value.length < 4;" oninput="if(this.value.length>=4) { this.value = this.value.slice(0,4); }" />  ## The Answer 16 5 people think this answer is useful Ugh. It’s like someone gave up half way through implementing it and thought no one would notice. For whatever reason, the answers above don’t use the min and max attributes. This jQuery finishes it up: $('input[type="number"]').on('input change keyup paste', function () {
if (this.min) this.value = Math.max(parseInt(this.min), parseInt(this.value) || 0);
if (this.max) this.value = Math.min(parseInt(this.max), parseInt(this.value) || 0);
});



It would probably also work as a named function “oninput” w/o jQuery if your one of those “jQuery-is-the-devil” types.

4 people think this answer is useful

As with type="number", you specify a max instead of maxlength property, which is the maximum possible number possible. So with 4 digits, max should be 9999, 5 digits 99999 and so on.

Also if you want to make sure it is a positive number, you could set min="0", ensuring positive numbers.

4 people think this answer is useful

HTML Input

 <input class="minutesInput" type="number" min="10" max="120" value="" />



jQuery

 $(".minutesInput").on('keyup keypress blur change', function(e) { if($(this).val() > 120){
$(this).val('120'); return false; } });  ## The Answer 19 3 people think this answer is useful <input type="number" onchange="this.value=Math.max(Math.min(this.value, 100), -100);" />  or if you want to be able enter nothing <input type="number" onchange="this.value=this.value ? Math.max(Math.min(this.value,100),-100) : null" />  ## The Answer 20 2 people think this answer is useful As I found out you cannot use any of onkeydown, onkeypress or onkeyup events for a complete solution including mobile browsers. By the way onkeypress is deprecated and not present anymore in chrome/opera for android (see: UI Events W3C Working Draft, 04 August 2016). I figured out a solution using the oninput event only. You may have to do additional number checking as required such as negative/positive sign or decimal and thousand separators and the like but as a start the following should suffice: function checkMaxLength(event) { // Prepare to restore the previous value. if (this.oldValue === undefined) { this.oldValue = this.defaultValue; } if (this.value.length > this.maxLength) { // Set back to the previous value. this.value = oldVal; } else { // Store the previous value. this.oldValue = this.value; // Make additional checks for +/- or ./, etc. // Also consider to combine 'maxlength' // with 'min' and 'max' to prevent wrong submits. } }  I would also recommend to combine maxlength with min and max to prevent wrong submits as stated above several times. ## The Answer 21 1 people think this answer is useful You can try this as well for numeric input with length restriction <input type="tel" maxlength="3" />  ## The Answer 22 1 people think this answer is useful I know there’s an answer already, but if you want your input to behave exactly like the maxlength attribute or as close as you can, use the following code: (function($) {
methods = {
/*
* addMax will take the applied element and add a javascript behavior
* that will set the max length
*/
// set variables
var
maxlAttr = $(this).attr("maxlength"), maxAttR =$(this).attr("max"),
x = 0,
max = "";

// If the element has maxlength apply the code.
if (typeof maxlAttr !== typeof undefined &amp;&amp; maxlAttr !== false) {

// create a max equivelant
if (typeof maxlAttr !== typeof undefined &amp;&amp; maxlAttr !== false){
while (x < maxlAttr) {
max += "9";
x++;
}
maxAttR = max;
}

// Permissible Keys that can be used while the input has reached maxlength
var keys = [
8, // backspace
9, // tab
13, // enter
46, // delete
37, 39, 38, 40 // arrow keys<^>v
]

// Apply changes to element
$(this) .attr("max", maxAttR) //add existing max or new max .keydown(function(event) { // restrict key press on length reached unless key being used is in keys array or there is highlighted text if ($(this).val().length == maxlAttr &amp;&amp; $.inArray(event.which, keys) == -1 &amp;&amp; methods.isTextSelected() == false) return false; });; } }, /* * isTextSelected returns true if there is a selection on the page. * This is so that if the user selects text and then presses a number * it will behave as normal by replacing the selection with the value * of the key pressed. */ isTextSelected: function() { // set text variable text = ""; if (window.getSelection) { text = window.getSelection().toString(); } else if (document.selection &amp;&amp; document.selection.type != "Control") { text = document.selection.createRange().text; } return (text.length > 0); } };$.maxlengthNumber = function(){
// Get all number inputs that have maxlength
methods.addMax.call($("input[type=number]")); } })($)

// Apply it:

$(this).change(function() { var today = new Date(); var date = new Date(this.value); var yearFuture = new Date(); yearFuture.setFullYear(yearFuture.getFullYear()+100); if(date.getFullYear() > yearFuture.getFullYear()) { this.value = today.getFullYear() + this.value.slice(4); } }) });  ## The Answer 25 0 people think this answer is useful I use a simple solution for all inputs (with jQuery): $(document).on('input', ':input[type="number"][maxlength]', function () {
if (this.value.length > this.maxLength) {
this.value = this.value.slice(0, this.maxLength);
}
});



The code select all input type=”number” element where maxlength has defined.

0 people think this answer is useful

Simple solution which will work on,

• Input scroll events

• Copy paste via keyboard

• Copy paste via mouse

• Input type etc cases

<input id="maxLengthCheck"
name="maxLengthCheck"
type="number"
step="1"
min="0"
oninput="this.value = this.value > 5 ? 5 : Math.abs(this.value)" />



See there is condition on this.value > 5, just update 5 with your max limit.

Explanation:

• If our input number is more then our limit update input value this.value with proper number Math.abs(this.value)

• Else just make it to your max limit which is again 5.