Paste in textarea without special chars - javascript

I have some js function what don't allow few special characters, chars etc...
Some users using paste and with paste all chars and special characters are allowed.
$(document).ready(function () {
//called when key is down
$("#recipient").bind("keydown", function (event) {
if ( event.keyCode == 46 || event.keyCode == 8 || event.keyCode == 9 || event.keyCode == 27 || event.keyCode == 13 || event.keyCode == 188 ||
// Allow: Ctrl+A
(event.keyCode == 65 && event.ctrlKey === true) ||
// Allow: Ctrl+C
(event.keyCode == 67 && event.ctrlKey === true) ||
// Allow: Ctrl+V
(event.keyCode == 86 && event.ctrlKey === true) ||
// Allow: home, end, left, right
(event.keyCode >= 35 && event.keyCode <= 39)) {
// let it happen, don't do anything
return;
} else {
// Ensure that it is a number and stop the keypress
if (event.shiftKey || (event.keyCode < 48 || event.keyCode > 57) && (event.keyCode < 96 || event.keyCode > 105 )) {
event.preventDefault();
}
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input class="form-control" type="text" id="recipient" name="recipient" required="required" minlength="9">
This textarea is for phonenumber, it need to be like : 123123123. How change code to dont paste phonenumber with "-" or spaces if someone paste number "123-123-123" or "123 123 123"?


Update: You could use .replace() to filter nonnumeric into empty string and use input instead of keydown to get the correct value of current input
$(document).ready(function () {
//called when key is down
$("#recipient").bind("input", function (event) {
if ( event.keyCode == 46 || event.keyCode == 8 || event.keyCode == 9 || event.keyCode == 27 || event.keyCode == 13 || event.keyCode == 188 ||
// Allow: Ctrl+A
(event.keyCode == 65 && event.ctrlKey === true) ||
// Allow: Ctrl+C
(event.keyCode == 67 && event.ctrlKey === true) ||
// Allow: Ctrl+V
(event.keyCode == 86 && event.ctrlKey === true) ||
// Allow: home, end, left, right
(event.keyCode >= 35 && event.keyCode <= 39)) {
// let it happen, don't do anything
return;
} else {
// Ensure that it is a number and stop the keypress
if (event.shiftKey || (event.keyCode < 48 || event.keyCode > 57) && (event.keyCode < 96 || event.keyCode > 105 )) {
event.preventDefault();
}
console.log(event.target.value)
var numeric = event.target.value.replace(/[^0-9,]/g, '')//replace non-numeric into empty string
console.log('numeric', numeric)
$('#recipient').val(numeric)
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input class="form-control" type="text" id="recipient" name="recipient" required="required" minlength="9">


Maybe the most simple and clear way is to use a regex to replace invalid characters:
$(document).ready(function () {
$("#recipient").bind("input", function (event) {
$('#recipient').val($('#recipient').val().replace(/\D/g,""))
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input class="form-control" type="text" id="recipient" name="recipient" required="required" minlength="9">


Javascript has a more simpler solution.
For formatting your phone number in real time as the user types, you can just get the values from the input box and then use,
input.oninput = function() {}
OR
For formatting your phone number stored in the clipboard, you can get the values from the clipboard by using
input.onpaste = function(event){}
You can make the functions that I've used smaller by removing the tempText & formattedText variables if you like, I used only them for code legibility and for the convenience of the user to use the variables elsewhere on the code.
/* Function 1 */
input.oninput = function() {
var regExpr = /[^0-9,^,]/g; //If you don't want ',' comma then remove ^, from the code between [ ]
var tempText = input.value;
var formattedText = tempText.replace(regExpr, "");
result.innerHTML = formattedText;
};
/* Function 2 */
input.onpaste = function(event) {
var regExpr = /[^0-9,^,]/g; //If you don't want ',' comma then remove ^, from the code between [ ]
var tempText = event.clipboardData.getData('text/plain');
var formattedText = tempText.replace(regExpr, "");
result.innerHTML = formattedText;
};
/*Has nothing to do with the paste formatting*/
body {
display: flex;
flex-direction: column;
height: 80vh;
justify-content: center;
align-items: center;
background: #222;
color: #eee;
text-align: center;
font-family: monospace;
font-size: 1.2em;
}
#input {
text-align: center
}
<body>
<div class="centerAll">
<form>
<label><b>Enter Phone Number</b></label><br/>
<input type="phone" id="input" placeholder="Enter Phone Number...">
<br/>
<br/> Copy paste this:<br/>123-123-123,123<br/>
<br/> Entered Phone number is:<br/>
<span id="result"></span>
</form>
</div>
</body>
I hope this helps...
Peace 🖖

Related

how can i validate to do not enter mobile number in description field of textarea using jquery

how can i validate to do not enter mobile number in description field of textarea using jquery
$('#jobpost').click(function () {
var phoneno = /^\d{10}$/;
var discription=$('.nicEdit-main').html();
if(discription.value.match(phoneno))
{
alert('gdfgdfg')
$("#froala-editor").parent().after("<div class='validation' style='color:red;margin-bottom: 20px;'>Please do not enter Mobile Number</div>");
$('#jobpost_form').attr('onsubmit','return false;');
}
});

Try this
.html
<div class="container">
<form id="jobpost_form">
<div class="row" id="froala-editor">
<label>Enter Description</label>
<textarea class="nicEdit-main" placeholder="write about yourself">
</textarea>
</div>
<button type="submit" id="jobpost">Submit</button>
</form>
</div>
.Js
$('#jobpost').click((e)=> {
e.preventDefault();
var phoneno = /[0-9]{10,12}$/; // if +91 added it would be 12
var discription=$('.nicEdit-main').val();
if(discription.match(phoneno))
{
$("#froala-editor").parent().after("<div class='validation' style='color:red;margin-bottom: 20px;'>Please do not enter Mobile Number</div>");
$('#jobpost_form').attr('onsubmit','return false;');
}
});
Note: You can modify as per your requirement. This given regular expression actually check the length of digits that should be equal or more than 10-12 digits to ensure as a mobile number.
Feel free to comment for more help

if you trying to validate mobile-number in textarea field.
use this pattern /\d{10}/
change this $('.nicEdit-main').html(); to $('.nicEdit-main').val();
change discription.value.match(phoneno) to this discription.match(phoneno)
In the pattern, use ^ and $ only if you want to match only mobile-number.

As per your question you can go through other solution where you can simply restrict user before typing a numeric value in the textarea.
And to do so you can use keypress/input function of textarea(input).
<textarea id="txt" oninput="validateInput(event)"></textarea>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
$("#txt").keydown(function (e) {if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110]) !== -1 || (e.keyCode === 65 && (e.ctrlKey === true || e.metaKey === true)) || (e.keyCode >= 35 && e.keyCode <= 40)) {
return;
}
if (e.key === '!' || e.key === '#' || e.key === '#' || e.key === '$' || e.key === '%' || e.key === '^' || e.key === '*' || e.key === '(' || e.key === ')') {
return;
}
if ((e.keyCode >= 48 && e.keyCode <= 57) || (e.keyCode >= 96 && e.keyCode <= 105)) {
e.preventDefault();
}
});
function validateInput(e) {
var val = $("#txt").val();
val = val.replace(/\d+/g, '');
$("#txt").val(val);
}
You can check the working demo Right Here.
Hope this may help you because your question is very unique.

jQuery - How can I allow both numpad and number key row input; as well as prevent special characters from being entered?

I want to allow both number pad numeric and oridinary number from keyboard. Currently, it only allows the number key row. I also only want numbers to be entered, but it currently allows special characters.
$(document).ready(function() {
$('#price').keydown(function(event) {
if ((event.which != 46 || $(this).val().indexOf('.') != -1) && (event.which < 48 || event.which > 57) && event.which != 8) {
event.preventDefault();
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type='text' id='price'>

Have a look at this plug-in (Fork of texotela's numeric jquery plugin). This (jStepper) is another one.
This is a link if you want to build it yourself.
$(document).ready(function() {
$("#txtboxToFilter").keydown(function (e) {
// Allow: backspace, delete, tab, escape, enter and .
if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190]) !== -1 ||
// Allow: Ctrl+A, Command+A
(e.keyCode === 65 && (e.ctrlKey === true || e.metaKey === true)) ||
// Allow: home, end, left, right, down, up
(e.keyCode >= 35 && e.keyCode <= 40)) {
// let it happen, don't do anything
return;
}
// Ensure that it is a number and stop the keypress
if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
e.preventDefault();
}
});
});
NOTE: If your webpage uses HTML5, you can use the built-in <input type="number"> and use the min and max properties to control the minimum and maximum value.
$(function() {
$('#staticParent').on('keydown', '#child', function(e){-1!==$.inArray(e.keyCode,[46,8,9,27,13,110,190])||(/65|67|86|88/.test(e.keyCode)&&(e.ctrlKey===true||e.metaKey===true))&&(!0===e.ctrlKey||!0===e.metaKey)||35<=e.keyCode&&40>=e.keyCode||(e.shiftKey||48>e.keyCode||57<e.keyCode)&&(96>e.keyCode||105<e.keyCode)&&e.preventDefault()});
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div id="staticParent">
<input id="child" type="textarea" />
</div>
I coppied from it on here
If its help for you.Please vote first writer .

Updated your code
$(document).ready(function() {
$('#price').keydown(function(event) {
if((event.which >= 48 && event.which <= 57) && event.shiftKey) {
event.preventDefault();
}
if ((event.which != 46 || $(this).val().indexOf('.') != -1) && (event.which < 48 || event.which > 57) && event.which != 8) {
event.preventDefault();
}
});
});

Use keypress for that instead of keydown
then
the keyCode of 0 to 9 are 48 to 57 so use this condition
if (event.keyCode < 48 || event.keyCode > 57) {
event.preventDefault();
}
this condition returns true if you enter keys that are not 0, 1, 2, 3, 4, 5, 6, 7 ,8 and 9 or not numbers
So your code would be like this
$(document).ready(function() {
$('#price').keypress(function(event) {
if (event.keyCode < 48 || event.keyCode > 57) {
event.preventDefault();
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type='text' id='price'>

Why we don't user input type number. I think just do it easy like this:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type='number' id='price'>

Javascript : Number input - prevent more than one decimal point

I was looking at make an input only-numeric type on knockout.
The accepted answer works fine but how can a more than one decimal point (like 4.4.4) be prevented from being entered (or how can a second decimal point be prevented)?
the code goes like this:
<input id="text" type="text" data-bind="numeric, value: number">
ko.bindingHandlers.numeric = {
init: function (element, valueAccessor) {
$(element).on("keydown", function (event) {
// Allow: backspace, delete, tab, escape, and enter
if (event.keyCode == 46 || event.keyCode == 8 || event.keyCode == 9 || event.keyCode == 27 || event.keyCode == 13 ||
// Allow: Ctrl+A
(event.keyCode == 65 && event.ctrlKey === true) ||
// Allow: . ,
(event.keyCode == 188 || event.keyCode == 190 || event.keyCode == 110) ||
// Allow: home, end, left, right
(event.keyCode >= 35 && event.keyCode <= 39)) {
// let it happen, don't do anything
return;
}
else {
// Ensure that it is a number and stop the keypress
if (event.shiftKey || (event.keyCode < 48 || event.keyCode > 57) && (event.keyCode < 96 || event.keyCode > 105)) {
event.preventDefault();
}
}
});
}
};

The custom binding does not look good for me. I'd recommend just using Knockout Validation, which proved a great plugin in my workflow with knockout. The syntax is easy: ko.observable(...).extend({ number: true }). You may also add min/max validation: .extend({ number: true, min: 0, max: 100 }) // percentage and the plugin allows to add css classes to invalid elements.
See example below. It does just what you want.
function viewModel() {
this.number = ko.observable(0).extend({ number: true });
}
ko.applyBindings(new viewModel(), document.body);
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout-validation/2.0.3/knockout.validation.js"></script>
<input data-bind="textinput: number" />

How to prevent all special characters in a form

So I am trying to prevent all special characters in a form. I want only numbers and alphabet characters. For some reason my javascript below is always shows special characters event if I have only "232 elm".
I also want to use a period or exlamation point. Mainly I am trying to prevent these ¡™£¢∞§¶•ªº. We have users that like to use the degree symbol instead of spelling "degree".
This code always shows the alert no matter what is typed?
var alphanumers = /^[a-zA-Z0-9]+$/;
if(!alphanumers.test($("#notes").val())){
alert('You have special characters on instructions field.');
e.preventDefault();
return false;
}

This works for me:
HTML:
<h1>DEMO1</h1>
<input type="text" id="data" name="data" onkeyup="checkInput()">
<h1>DEMO2</h1>
<form action="#" method="post" onsubmit="return checkForm(this)">
<input type="text" id="data2" name="data" value="123abc+-*/">
<input type="submit">
</form>
Javascript:
DEMO1:
function checkInput(){
var testit = $('#data').val();
if( /[^a-zA-Z0-9\-\/]/.test( testit ) ) {
$('#data').css('background', '#f00');
}else{
$('#data').css('background', '#fff');
}
}
DEMO2:
function checkForm( theForm ){
var testit = $('#data2').val();
if( /[^a-zA-Z0-9\-\/]/.test( testit ) ) {
$('#data2').css('background', '#f00');
return false;
}else{
$('#data2').css('background', '#fff');
return true;
}
}
Demo: http://codesheet.org/codesheet/dMslCMmZ

I totally love this script! :
$("input").keydown(function (e) {
// Allow: backspace, delete, tab, escape, enter and .
if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190]) !== -1 ||
// Allow: Ctrl+A
(e.keyCode == 65 && e.ctrlKey === true) ||
// Allow: Ctrl+C
(e.keyCode == 67 && e.ctrlKey === true) ||
// Allow: Ctrl+X
(e.keyCode == 88 && e.ctrlKey === true) ||
// Allow: home, end, left, right
(e.keyCode >= 35 && e.keyCode <= 39)) {
// let it happen, don't do anything
return;
}
// Ensure that it is a number or alphabet and stop the keypress
if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 90)) && (e.keyCode < 96 || e.keyCode > 105)) {
e.preventDefault();
}
});
Here is the original source on stackoverflow, its for inputs to stop anything but nubers, i modified it a bit, hope it helps!
Try the jsfiddle

jquery only allow input float number

i'm making some input mask that allows only float number. But current problem is I can't check if multiple dots entered. Can you check those dots and prevent it for me?
Live Code: http://jsfiddle.net/thisizmonster/VRa6n/
$('.number').keypress(function(event) {
if (event.which != 46 && (event.which < 47 || event.which > 59))
{
event.preventDefault();
if ((event.which == 46) && ($(this).indexOf('.') != -1)) {
event.preventDefault();
}
}
});

You can check for the period in the same statement.
Also, you need to use the val method to get the value of the element.
Also, you want to check for the interval 48 to 57, not 47 to 59, otherwise you will also allow /, : and ;.
jQuery(document).ready(function() {
$('.float-number').keypress(function(event) {
if ((event.which != 46 || $(this).val().indexOf('.') != -1) && (event.which < 48 || event.which > 57)) {
event.preventDefault();
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<html>
<body>
Enter Number:
<input type="text" name="number" value="" class="float-number">
</body>
</html>

I think you guys have missed the left right arrows, delete and backspace keys.
$('.number').keypress(function(event) {
if(event.which == 8 || event.keyCode == 37 || event.keyCode == 39 || event.keyCode == 46)
return true;
else if((event.which != 46 || $(this).val().indexOf('.') != -1) && (event.which < 48 || event.which > 57))
event.preventDefault();
});

I think everybody forgot the case of pasting text with the mouse, in which you can't detect the keystrokes, because there's none. Here's another approach I have been working on.
// only integer or float numbers (with precision limit)
// example element: <input type="text" value="" class="number" name="number" id="number" placeholder="enter number" />
$('.number').on('keydown keypress keyup paste input', function () {
// allows 123. or .123 which are fine for entering on a MySQL decimal() or float() field
// if more than one dot is detected then erase (or slice) the string till we detect just one dot
// this is likely the case of a paste with the right click mouse button and then a paste (probably others too), the other situations are handled with keydown, keypress, keyup, etc
while ( ($(this).val().split(".").length - 1) > 1 ) {
$(this).val($(this).val().slice(0, -1));
if ( ($(this).val().split(".").length - 1) > 1 ) {
continue;
} else {
return false;
}
}
// replace any character that's not a digit or a dot
$(this).val($(this).val().replace(/[^0-9.]/g, ''));
// now cut the string with the allowed number for the integer and float parts
// integer part controlled with the int_num_allow variable
// float (or decimal) part controlled with the float_num_allow variable
var int_num_allow = 3;
var float_num_allow = 1;
var iof = $(this).val().indexOf(".");
if ( iof != -1 ) {
// this case is a mouse paste (probably also other events) with more numbers before the dot than is allowed
// the number can't be "sanitized" because we can't "cut" the integer part, so we just empty the element and optionally change the placeholder attribute to something meaningful
if ( $(this).val().substring(0, iof).length > int_num_allow ) {
$(this).val('');
// you can remove the placeholder modification if you like
$(this).attr('placeholder', 'invalid number');
}
// cut the decimal part
$(this).val($(this).val().substring(0, iof + float_num_allow + 1));
} else {
$(this).val($(this).val().substring(0, int_num_allow));
}
return true;
});

Good for integer and float values. Plus, copy/paste clipboard event.
var el = $('input[name="numeric"]');
el.prop("autocomplete",false); // remove autocomplete (optional)
el.on('keydown',function(e){
var allowedKeyCodesArr = [9,96,97,98,99,100,101,102,103,104,105,48,49,50,51,52,53,54,55,56,57,8,37,39,109,189,46,110,190]; // allowed keys
if($.inArray(e.keyCode,allowedKeyCodesArr) === -1 && (e.keyCode != 17 && e.keyCode != 86)){ // if event key is not in array and its not Ctrl+V (paste) return false;
e.preventDefault();
} else if($.trim($(this).val()).indexOf('.') > -1 && $.inArray(e.keyCode,[110,190]) != -1){ // if float decimal exists and key is not backspace return fasle;
e.preventDefault();
} else {
return true;
};
}).on('paste',function(e){ // on paste
var pastedTxt = e.originalEvent.clipboardData.getData('Text').replace(/[^0-9.]/g, ''); // get event text and filter out letter characters
if($.isNumeric(pastedTxt)){ // if filtered value is numeric
e.originalEvent.target.value = pastedTxt;
e.preventDefault();
} else { // else
e.originalEvent.target.value = ""; // replace input with blank (optional)
e.preventDefault(); // retur false
};
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input type="text" name="numeric" value="" placeholder="insert value">
[2017-10-31] Vanilla.js
let el = document.querySelector('input[name="numeric"]');
el.addEventListener('keypress',(event) => {
let k = event.key,
t = isNaN(k),
sc = ['Backspace'].indexOf(k) === -1,
d = k === '.',dV = el.value.indexOf('.') > -1,
m = k === '-',mV = el.value.length > 0;
if((t && sc) && ((d && dV) || (m && dV) || (m && mV) || ((t && !d) && (t && !m)))){event.preventDefault();}
},false);
el.addEventListener('paste',(event) => {
if(event.clipboardData.types.indexOf('text/html') > -1){
if(isNaN(event.clipboardData.getData('text'))){event.preventDefault();}
}
},false);
<input type="text" name="numeric">

Your code seems quite fine but overcomplicated.
First, it is $(this).val().indexOf, because you want to do something with the value.
Second, the event.which == 46 check is inside an if clause that's only passed when event.which != 46, which can never be true.
I ended up with this which works: http://jsfiddle.net/VRa6n/3/.
$('.number').keypress(function(event) {
if(event.which < 46
|| event.which > 59) {
event.preventDefault();
} // prevent if not number/dot
if(event.which == 46
&& $(this).val().indexOf('.') != -1) {
event.preventDefault();
} // prevent if already dot
});

I found this way to do this,
$.validator.addMethod("currency", function (value, element) {
return this.optional(element) || /^\$(\d{1,3}(\,\d{3})*|(\d+))(\.\d{2})?$/.test(value);
}, "Please specify a valid amount");
https://gist.github.com/jonkemp/9094324

HTML
<input type="text" onkeypress="return isFloatNumber(this,event)" />
Javascript
function isFloatNumber(item,evt) {
evt = (evt) ? evt : window.event;
var charCode = (evt.which) ? evt.which : evt.keyCode;
if (charCode==46)
{
var regex = new RegExp(/\./g)
var count = $(item).val().match(regex).length;
if (count > 1)
{
return false;
}
}
if (charCode > 31 && (charCode < 48 || charCode > 57)) {
return false;
}
return true;
}
jsfiddle.net

Using JQuery.
$(document).ready(function()
{
//Only number and one dot
function onlyDecimal(element, decimals)
{
$(element).keypress(function(event)
{
num = $(this).val() ;
num = isNaN(num) || num === '' || num === null ? 0.00 : num ;
if ((event.which != 46 || $(this).val().indexOf('.') != -1) && (event.which < 48 || event.which > 57))
{
event.preventDefault();
}
if($(this).val() == parseFloat(num).toFixed(decimals))
{
event.preventDefault();
}
});
}
onlyDecimal("#TextBox1", 3) ;
});

One-more plugin, based on Carlos Castillo answer
https://github.com/nikita-vanyasin/jquery.numberfield.js
Adds method to jQuery object:
$('input.my_number_field').numberField(options);
where options is (you can pass any or no options):
{
ints: 2, // digits count to the left from separator
floats: 6, // digits count to the right from separator
separator: "."
}

Using jQuery and allowing negative floats :
// Force floats in '.js_floats_only' inputs
$(document).ready(function() {
$('.js_floats_only').each(function() {
// Store starting value in data-value attribute.
$(this).data('value', this.value);
});
});
$(document).on('keyup', '.js_floats_only', function() {
var val = this.value;
if ( val == '-' ) {
// Allow starting with '-' symbol.
return;
} else {
if ( isNaN(val) ) {
// If value is not a number put back previous valid value.
this.value = $(this).data('value');
} else {
// Value is valid, store it inside data-value attribute.
$(this).data('value', val);
}
}
});

For simple cases and without hardcoding some html instructions would fit that pretty enough
<input type="number" step="0.01"/>

$('.number').keypress(function(event){
if($.browser.mozilla == true){
if (event.which == 8 || event.keyCode == 37 || event.keyCode == 39 || event.keyCode == 9 || event.keyCode == 16 || event.keyCode == 46){
return true;
}
}
if ((event.which != 46 || $(this).val().indexOf('.') != -1) && (event.which < 48 || event.which > 57)) {
event.preventDefault();
}
});
This works in all browsers.

<input type="text" data-textboxtype="numeric" />
<script>
$(document).on('keydown', '[data-textboxtype="numeric"]', function (e) {
// Allow: backspace, delete, tab, escape, enter and . and -
if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190, 109, 189]) !== -1 ||
// Allow: Ctrl+A
(e.keyCode == 65 && e.ctrlKey === true) ||
// Allow: home, end, left, right, down, up
(e.keyCode >= 35 && e.keyCode <= 40)) {
// let it happen, don't do anything
return true;
}
// Ensure that it is a number and stop the keypress
if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
e.preventDefault();
return false;
}
return true;
});
</script>

Below Code I am allowing only Digits and Dot symbol.
ASCII characters number starts in 47 and ends with 58 and dot value is 190.
$("#Experince").keyup(function (event) {
debugger
if ((event.which > 47
&& event.which < 58) ||event.which== 190) {
if ($("#Experince").val().length > 3) {
}
} // prevent if not number/dot
else {
$("#Experince").val($("#Experince").val().slice(0, -1))
}
});

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