How to Allow float value in Input.When i am trying to input float value decimal (.) not able to enter.
Example: 143.52, 178.30, 3658.20 etc..
http://jsfiddle.net/vLEZY/75/
<input type="text" onkeypress='return validateQty(event);'>
<script
function validateQty(event) {
var key = window.event ? event.keyCode : event.which;
if (event.keyCode == 8 || event.keyCode == 46 || event.keyCode == 37 || event.keyCode == 39) {
return true;
} else if (key < 48 || key > 57) {
return false;
} else return true;
};
</script>
Here you go: http://jsfiddle.net/mcg0x0hh/2/
if (event.keyCode == 8 || key == 46 || event.keyCode == 37 || event.keyCode == 39)
I modified event.keyCode in key for the code 46, which is the dot. I would change all event.keyCode to key, unless you have a good reason to keep them like that.
Related
I've a function ,
function validateDigit(event) {
var key = window.event ? event.keyCode : event.which;
if (event.keyCode == 8 || event.keyCode == 9 || event.keyCode == 46 || event.keyCode == 37 || event.keyCode == 39 || event.keyCode == 190) {
return true;
}
else if ( key < 48 || key > 57 ) {
return false;
}else if(event.shiftKey == true){
return false;
}
else return true;
};
which takes only numeric numbers and no alphabets .But Now I Want To Set The First 3 digits of a mobile phone number as like 017/016/015/018 and after then there will be more 8 digits.how to do this ?
Don't.
<form action="javascript:alert('Submitted!');">
<input type="tel" pattern="01[5-8]\d{8}" title="Mobile number beginning with 015/016/017/018" />
</form>
Done.
I have a function which acts on keydown event and I want it to allow only numbers, backspace and 1 dot. I can't make it work. Here is what I tried:
$('#input[type="number"]').keydown(function(e) {
this.value = this.value.toLowerCase();
var regex = new RegExp("^[0-9.,\b]+$");
var key = String.fromCharCode(!e.charCode ? e.which : e.charCode);
if (!regex.test(key)) {
console.log('stop now')
e.preventDefault();
return false;
}
});
It still prevents dot, but allows numbers. I think my Regex is wrong and needs a tweak.
The comment is gone, but some user suggested that it could be to do with the escaping of the . and , ?? Any ideas?
Use keypress insetead of the keydown event. There are different charcodes sent for some keys for the keydown event. The dot is one of them, sending code 190 instead of the ASCII 46. You can play around with it here.
you can use this instead of using regex. I think This will help you
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<script type="text/javascript" language="jscript">
function fncInputNumericValuesOnly() {
if (!(event.keyCode == 32 || event.keyCode == 46 || event.keyCode == 48 || event.keyCode == 49 || event.keyCode == 50 || event.keyCode == 51 || event.keyCode == 52 || event.keyCode == 53 || event.keyCode == 54 || event.keyCode == 55 || event.keyCode == 56 || event.keyCode == 57))
{
event.returnValue = false;
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txtEmpName" onkeypress="fncInputNumericValuesOnly()" runat="server"></asp:TextBox>
</div>
</form>
</body>
</html>
My answer comes a little late but here I've changed your code to something which may work for you:
var valid_value = '';
$('#input[type="number"]').keyup(function(e) {
var regex = new RegExp(/^[0-9]*\.?[0-9]*$/);
if (!regex.test(this.value)) {
this.value = valid_value;
console.log('stop now');
} else {
valid_value = this.value;
}
});
Have you ever tried something like that?
Of course is not perfect but you can assume it as a starter point:
var whitelist = /^\d+\.?\d+?[\b]?$/;
function testInput() {
var val = document.getElementById('val').value;
var res = document.getElementById('res');
if(whitelist.test(val)) {
res.innerText = 'YEP';
} else {
res.innerText = 'NOOPE';
}
}
<input onchange="testInput()" type="text" id="val"/>
<h1 id="res"></h1>
This is what I came up with in the end. A little manual but does the trick!
$('#input[type="number"]').keydown(function(e) {
if (!(e.keyCode == 190 || e.keyCode == 8 || e.keyCode == 9 || e.keyCode == 13 || e.keyCode == 32 || e.keyCode == 46 || e.keyCode == 48 || e.keyCode == 49 || e.keyCode == 50 || e.keyCode == 51 || e.keyCode == 52 || e.keyCode == 53 || e.keyCode == 54 || e.keyCode == 55 || e.keyCode == 56 || e.keyCode == 57)) {
e.returnValue = false;
e.preventDefault();
return false;
}
});
A bit late to the party, but this would work.
edit: click run code snippit before you downvote
var onlySome = restrictKeys([8,190]) // allow the dot
// decorate the jquery function with some functional goodness
$('input[type="text"]').keydown(onlySome(function(e) {
stackLog(['key alowed', e.which, String.fromCharCode(e.which)]);
}));
// functional function to partially apply restricted keys and callback functiion
function restrictKeys(keys) {
return function(fn) {
return function(e) {
// all codes between 48 and 57 are number and cool to leave in, then just filter out our array
if ((e.which < 48 || e.which > 57) && keys.indexOf(e.which) < 0) {
stackLog(['nope', e.which, String.fromCharCode(e.which)]);
e.preventDefault();
return false
}
return fn.call(this, e);
}
}
}
function stackLog(log) {
var _console = document.querySelector('#console');
_console.innerHTML = JSON.stringify(log) + '\n' + _console.innerHTML;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" placeholder="enter text here">
<pre id="console"></pre>
I want to allow only one . in textfield, with backspace, left and right arrow.
I found this this link.
only allow numbers, backspace, delet, left arrow and right arrow keys in textbox
I addded one more validation in above code, so that user can add only . in textfield, but it's not working.
JS
function validateQty(event) {
var key = window.event ? event.keyCode : event.which;
if (event.keyCode == 8 || event.keyCode == 46 || event.keyCode == 37 || event.keyCode == 39 ) {
if($(this).val().indexOf('.') == -1)
return true;
else
return false;
}
else if ( key < 48 || key > 57 ) {
return false;
}
else return true;
};
JSFiddle
The problem as I see it is that in the line if($(this).val().indexOf('.') == -1), the this is the Window object not the input control.
Try adding an ID to the input control and reference the same in the code as:
function validateQty(event) {
var key = window.event ? event.keyCode : event.which;
if (event.keyCode == 8 || event.keyCode == 46 || event.keyCode == 37 || event.keyCode == 39 ) {
if($('#IdofInputControl').val().indexOf('.') == -1)
return true;
else
return false;
}
else if ( key < 48 || key > 57 ) {
return false;
}
else return true;
};
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" ID="IdofInputControl" onkeypress='return validateQty(event);'>
And your validation should work!
function isNumber(evt) {
evt = (evt) ? evt : window.event;
var charCode = (evt.which) ? evt.which : evt.keyCode;
if (charCode > 31 && (charCode < 48 || charCode > 57)&&(evt.which != 46 || $('#refAmount').val().indexOf('.') != -1)) {
return false;
}
return true;
}
You can use following code with some modifications of keys which you want to use or not.
jQuery("#YourSelector").keypress(function (evt) {
var charCode = (evt.which) ? evt.which : evt.keyCode;
if (charCode != 46 && charCode > 31 && (charCode < 43 || charCode > 57)){
return false;
}else{
return true;
}
});
On html I have one input box in which I just want to enter numeric values. I used following function:
function allowNumbersOnly(event,locale) {
if(locale=='en' && (event.keyCode==190 || event.keyCode==110)){
return true;
}
else if(locale=='nl' && (event.keyCode==188 || event.keyCode==190 || event.keyCode==110)){
return true;
}
if(event.keyCode==189 || (event.keyCode==109) ){
return true;
}
var key = event.charCode || event.keyCode || 0;
// allow backspace, tab, delete, arrows, numbers and keypad numbers ONLY
if (
key == 8 ||
key == 9 ||
key == 46 ||
(key >= 37 && key <= 40) ||
(key >= 48 && key <= 57) ||
(key >= 96 && key <= 105)){
}else{
event.preventDefault();
}
}
This code works fine. But when I am pressing shift key+ any number from keyboard then special character gets entered. Can anyone tell me how to solve this issue?
Try the following function
function isNumber(evt) {
evt = (evt) ? evt : window.event;
var charCode = (evt.which) ? evt.which : evt.keyCode;
if (charCode > 31 && (charCode < 48 || charCode > 57)) {
return false;
}
return true;
}
If you are using HTML5 just try
<input type="number">
Try like this:
function blockspecialcharacter(e) {
var key= document.all ? key= e.keyCode : key= e.which;
return ((key > 64 && key < 91) || (key> 96 && key< 123) || key== 8 || key== 32 || (key>= 48 && key<= 57));
}
Check demo here
shiftKey event attribute returns a Boolean value that indicates whether or not the "SHIFT" key was pressed
if (event.shiftKey==1)
{
alert("The shift key was pressed!")
}
else
{
alert("The shift key was NOT pressed!")
}
so you can exit from your function if shift is pressed using value of event.shiftKey
// in your code
function allowNumbersOnly(event,locale) {
if (event.shiftKey==1) {
return false;
} // RETURN if shift key got clicked.
if (locale=='en' && (event.keyCode==190 || event.keyCode==110)) {
return true;
}
else if (locale=='nl' && (event.keyCode == 188 ||
event.keyCode == 190 ||
event.keyCode == 110)) {
return true;
}
if (event.keyCode==189 || (event.keyCode==109)) {
return true;
}
var key = event.charCode || event.keyCode || 0;
// allow backspace, tab, delete, arrows, numbers and keypad numbers ONLY
if (key == 8 ||
key == 9 ||
key == 46 ||
(key >= 37 && key <= 40) ||
(key >= 48 && key <= 57) ||
(key >= 96 && key <= 105)) {
}
else {
event.preventDefault();
}
}
Try this:
function blockSpecialChars(e){
var e = e || window.event;
var k = e.which || e.keyCode;
var s = String.fromCharCode(k);
return !/^[\\\"\'\;\:\>\|~`!##\$%^&*\(\)]$/i.test(s);
}
Add or remove the special characters from the above code to make it as you need.
I am using following javascript code which I think should only allow numbers, backspace, delet, left arrow and right arrow keys in textbox, but it is also allowing alphabets. I don't know why?
function validateQty(event) {
var key = window.event ? event.keyCode : event.which;
if (event.keyCode == 8 || event.keyCode == 46
|| event.keyCode == 37 || event.keyCode == 39) {
return true;
}
else if ( key < 48 || key > 57 ) {
return false;
}
else return true;
};
Calling this function as
<input type="text" onkeypress='validateQty(event)'>
No doubt your code is correct but you missed "return" keyword in textbox.
<input type="text" onkeypress='return validateQty(event);'>
You can see the code here
<input type="text" class="form-control" id="dompetku_msisdn" name="dompetku_msisdn" placeholder="Phone Number" aria-describedby="helpBlock" onkeydown='return (event.which >= 48 && event.which <= 57) || event.which == 8 || event.which == 46 || event.which == 37 || event.which == 39' required /> </input>
function isNumberKey(evt)
{
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48 || charCode > 57))
return false;
return true;
}
<HTML>
<HEAD>
</HEAD>
<BODY>
<input id="txtChar" onkeypress="return isNumberKey(event)" type="text" name="txtChar" maxlength="10">
</BODY>
</HTML>
const validateQty = (event) => {
var key = window.event ? event.keyCode : event.which;
console.log(event);
if (event.keyCode === 8 || event.keyCode === 46
|| event.keyCode === 37 || event.keyCode === 39) {
return true;
} else if (key < 48 || key > 57) {
return false;
} else { return true; }
};
<input type="text" onkeydown='return validateQty(event);'>
I modified his code a bit, so you can just add a class to an input
$(".numberonly").keydown(function(e){
// Number Only
if (e.keyCode == 8 || e.keyCode == 46
|| e.keyCode == 37 || e.keyCode == 39) {
return true;
}
else if ( e.keyCode < 48 || e.keyCode > 57 ) {
e.preventDefault();
}
});
add class to an input
<input type="text" class="numberonly" />