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javascript not working on phone [duplicate]

I have created a simple code to handle keypress event:
var counter = 0;
$('input').on('keypress', function () {
$('div').text('key pressed ' + ++counter);
});
JSFiddle.
But keypress event handler is not raised on mobile browser (Android 4+, WindowsPhone 7.5+).
What could be the issue?

I believe keypress is deprecated now. You can check in the Dom Level 3 Spec. Using keydown or keyup should work. The spec also recommends that you should use beforeinput instead of keypress but I'm not sure what the support of this is.

Use the keyup event:
// JavaScript:
var counter = 0;
document.querySelector('input').addEventListener('keyup', function () {
document.querySelector('div').textContent = `key up ${++counter}`;
});
// jQuery:
var counter = 0;
$('input').on('keyup', function () {
$('div').text('key up ' + ++counter);
});

Use jQuery's input event, like this:
$( 'input' ).on( 'input', function() {
...
} );
With this you can't use e.which for determining which key was pressed, but I found a nice workaround here: http://jsfiddle.net/zminic/8Lmay/

$(document).ready(function() {
var pattForZip = /[0-9]/;
$('#id').on('keypress input', function(event) {
if(event.type == "keypress") {
if(pattForZip.test(event.key)) {
return true;
}
return false;
}
if(event.type == 'input') {
var bufferValue = $(this).val().replace(/\D/g,'');
$(this).val(bufferValue);
}
})
})

Yes, some android browser are not supporting keypress event, we need use to only keydown or keyup but will get different keycodes, to avoiding different key codes use the following function to get the keycode by sending char value.
Eg:
function getKeyCode(str) {
return str && str.charCodeAt(0);
}
function keyUp(){
var keyCode = getKeyCode("1");
}

I think it is bad idea to use other events in place of 'keypress'.
What you need to do is just include a jQuery file into your project.
A file named jQuery.mobile.js or quite similar (ex. jQuery.ui.js) of any version can help you.
You can download it from : https://jquerymobile.com/download/

JS onkeydown/onkeyup - convert to jQuery keydown/keyup

I currently have some js for phone number validation that is using inline event listeners in the input field. I need to change this example so that instead of attaching the event listeners inline, I would be targeting the DOM element in jQuery and adding the event listeners. Here's a working example of what I have so far: http://jsfiddle.net/yVdgL/21/
window.mask = function (e,f){
var len = f.value.length;
var key = whichKey(e);
if((key>=47 && key<=58) || (key>=96 && key<=105))
{
if( len==1 )f.value='('+f.value
else if(len==4 )f.value=f.value+')'
else if(len==8 )f.value=f.value+'-'
else f.value=f.value;
}
}
function whichKey(e) {
var code;
if (!e) var e = window.event;
if (e.keyCode) code = e.keyCode;
else if (e.which) code = e.which;
return code
}
and
<input type="text" name="phone" id="phone" onkeydown="mask(event,this)" onkeyup="mask(event,this)" maxlength="13" />
I tried this but was unable to achieve the functionality that I need.

i have update you jsfiddle example:-
jQuery(document).ready(function(){
jQuery('#edit-phone1').keyup(function(event){
mask(event,this);
});
jQuery('#edit-phone1').keydown(function(event){
mask(event,this);
});
});
click here to see working example:-
http://jsfiddle.net/yVdgL/38/
or you can try :-
$(document).ready(function() {
$('#edit-phone1').on("keyup keydown", function(e) {
mask(e, this);
});
});
link for this is:-http://jsfiddle.net/yVdgL/56/

In older, pre-HTML5 browsers, $("#phone").keyup( function ) or keydown is definitely what you're looking for.
In HTML5 there is a new event, "input", which behaves exactly like you seem to think "change" should have behaved - in that it fires as soon as a key is pressed to enter information into a form. $("#phone").bind('input',function);

You never defined event.
jQuery('#edit-phone1').keyup(function(){
jQuery('#edit-phone1').mask(event,this); //<-- what is event?
});
just add it
Second issue is you are treating window.mask like a jQuery plugin and it is not a plugin.
jQuery('#edit-phone1').keyup(function(event){ //<-- add event here
mask(event,this);
});

Bind enter key to specific button on page

<input type="button" id="save_post" class="button" value="Post" style="cursor:pointer;"/>
How can I bind the enter key on the persons keyboard to this specific button on the page? It's not in a form, and nor do I want it to be.
Thanks!

This will click the button regardless of where the "Enter" happens on the page:
$(document).keypress(function(e){
if (e.which == 13){
$("#save_post").click();
}
});

If you want to use pure javascript :
document.onkeydown = function (e) {
e = e || window.event;
switch (e.which || e.keyCode) {
case 13 : //Your Code Here (13 is ascii code for 'ENTER')
break;
}
}

using jQuery :
$('body').on('keypress', 'input', function(args) {
if (args.keyCode == 13) {
$("#save_post").click();
return false;
}
});
Or to bind specific inputs to different buttons you can use selectors
$('body').on('keypress', '#MyInputId', function(args) {
if (args.keyCode == 13) {
$('#MyButtonId').click();
return false;
}
});

Vanilla JS version with listener:
window.addEventListener('keyup', function(event) {
if (event.keyCode === 13) {
alert('enter was pressed!');
}
});
Also don't forget to remove event listener, if this code is shared between the pages.

Maybe not quite what you're looking for but there is a HTML property that lets you assign a specific button called an access key to focus or trigger an element. It's like this:
<a href='https://www.google.com' accesskey='h'>
This can be done with most elements.
Here's the catch: it doesn't always work. for IE and chrome, you need to be holding alt as well. On firefox, you need to be holding alt and shift (and control if on mac). For safari, you need to be holding control and alt. On opera 15+ you need alt, before 12.1 you need shift and esc.
Source: W3Schools

How can I disabling backspace key press on all browsers?

I'm trying to disable the backspace button on an order page in all cases except when a textarea or text input is an active element to prevent users from accidentally backing out of an order. I have it working fine in most browsers, but in IE (testing in IE9, both regular and compatibility mode) it still allows the user to hit the backspace and go to the previous page.
Here's the code:
$(document).keypress(function(e){
var activeNodeName=document.activeElement.nodeName;
var activeElType=document.activeElement.type;
if (e.keyCode==8 && activeNodeName != 'INPUT' && activeNodeName != 'TEXTAREA'){
return false;
} else {
if (e.keyCode==8 && activeNodeName=='INPUT' && activeElType != 'TEXT' && activeElType != 'text'){
return false;
}
}
});
Any advice on what I'm doing wrong here?
Thanks!

I think you're overcomplicating that. Rather than checking for an active element, find the event target instead. This should give you the information you need. It's also better to use keydown rather than keypress when there is no visible character. Finally, it's better to use e.preventDefault() for better granularity.
$(document).keydown(function(e) {
var nodeName = e.target.nodeName.toLowerCase();
if (e.which === 8) {
if ((nodeName === 'input' && e.target.type === 'text') ||
nodeName === 'textarea') {
// do nothing
} else {
e.preventDefault();
}
}
});
NB I could have done this the other way round, rather than an empty if block and all the code going in the else block, but I think this is more readable.

Instead of keypress, try the keydown function, it will fire before the actual browser based hook. Also, putting in a preventDefault() function will assist in this. IE :
$(document).keydown(function(e){
e.preventDefault();
alert(e.keyCode);
});
Hope this helps.

The most Simple thing you can do is add the following one line in the very first script of you page at very first line
window.history.forward(1);

Most examples seem to be for the JQuery framework - Here an example for ExtJS
(I've been getting a lot of downvotes for this recently as the question now has JQuery tag on it, which it didn't previously. I can remove the answer if you like as isn't for JQuery but it's proven to help others not using that framework).
To use this add this code block to your code base, I recommend adding it inside the applications init function().
/**
* This disables the backspace key in all browsers by listening for it on the keydown press and completely
* preventing any actions if it is not which the event fired from is one of the extjs nodes that it should affect
*/
Ext.EventManager.on(window, 'keydown', function(e, t) {
var nodeName = e.target.nodeName.toLowerCase();
if (e.getKey() == e.BACKSPACE) {
if ((nodeName === 'input' && e.target.type === 'text') ||
nodeName === 'textarea') {
// do nothing
} else {
e.preventDefault();
}
}
});

Use e.which instead of e.keyCode; jQuery normalizes this value across browsers.
http://api.jquery.com/keydown/
To determine which key was pressed,
examine the event object that is
passed to the handler function. While
browsers use differing properties to
store this information, jQuery
normalizes the .which property so you
can reliably use it to retrieve the
key code.
Then, use e.preventDefault(); to prevent the default behaviour of moving to the previous page.

<html>
<head>
<script type="text/javascript">
function stopKey(evt) {
var evt = (evt) ? evt : ((event) ? event : null);
var node = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);
if ((evt.keyCode == 8) && (node.type!="text")) {return false;}
}
document.onkeypress = stopKey;
</script>
</head>
<body onkeydown="return stopKey()">
<form>
<input type="TEXTAREA" name="var1" >
<input type="TEXT" name="var2" >
</form>
</body>
</html
I had to add the onDownKey attribute to the body in order to get editing keys to go to the functions.

$(document).keydown(function(e) {
var elid = $(document.activeElement).is('input');
if (e.keyCode === 8 && !elid) {
return false;
}
});
Hope this might help you

Seems like the "backspace" will also act as "navigation back" if you have selected radio buttons, check-boxes and body of document as well. Really annoying for forms - especially when using post. All the form could be lost with one slip of the "backspace" key -_- ...
Honestly... who's idea was it to allow the "backspace as a navigational "back" button!!! really bad idea in my opinion.
I disable the "backspace" default on anything that is not a text area or text field - like this:
$(document).keydown(function(e){
console.log(e.keyCode+"\n");
var typeName = e.target.type;//typeName should end up being things like 'text', 'textarea', 'radio', 'undefined' etc.
console.log(typeName+"\n");
// Prevent Backspace as navigation backbutton
if(e.keyCode == 8 && typeName != "text" && typeName != "textarea"){
console.log("Prevent Backbutton as Navigation Back"+typeName+"\n");
e.preventDefault();
}
//
})
Not sure where else one would want the normal behavior of a back-button other than in these two areas.

document.onkeydown = KeyPress;
function KeyPress(e) {
if (!e.metaKey){
e.preventDefault();
}
}

How can I capture keyboard events are from which keys?

I googled and got the following codes on the Net.However, when I press a keyboard key,it is not displaying me an alert box. I want to get which character I have pressed in the alert box. How do I fix this?
<script type="text/javascript">
var charfield=document.getElementById("char")
charfield.onkeydown=function(e){
var e=window.event || e;
alert(e.keyCode);
}
</script>
</head>
<body id="char">
</body>
</html>

If you want to get the character typed, you must use the keypress event rather than the keydown event. Something like the following:
var charfield = document.getElementById("char");
charfield.onkeypress = function(e) {
e = e || window.event;
var charCode = (typeof e.which == "number") ? e.which : e.keyCode;
if (charCode > 0) {
alert("Typed character: " + String.fromCharCode(charCode));
}
};

try this jquery code
$("body").keypress(function(e){
alert(e.which);
});

I can't off the top of my head think of a good situation in which to use the "on some event" method of a DOM element to deal with events on that element.
The best practice is to use addEventListener (or attachEvent in older versions of Internet Explorer) like so:
charfield.addEventListener('keydown', function (e) { alert(e.keyCode); }, false);
If you want to account for attachEvent as well:
(function (useListen) {
if (useListen) {
charfield.addEventListener('keydown', alertKeyCode, false);
} else {
charfield.attachEvent('onkeydown', alertKeyCode);
}
})(charfield.addEventListener);
function alertKeyCode(e) {
alert(e.keyCode);
}

You'll get the appropriate key code:
charfield.onkeydown=function(evt){
var keyCode = (evt.which?evt.which:(evt.keyCode?evt.keyCode:0))
alert(keyCode);
}