Javascript ignore function - javascript

I am working on a site at work. It is a business application running on Spring MVC tiles with a Tomcat server. The real question is this. There is a function that is passed into each tile that ignores the enter key on the forms. Is there a short javascript function to ignore a javascript function(as fun as that sounds)? For exanmple, there is a create form where you should not be able to press enter but above the form is a search box where you should be able to press enter. One is navbar.jsp and other is create***********.jsp. I have spent a couple of hours doing research on here and doing the tried and true method of just trying anything but could not figure it out. It would be really great if I could override that function in the navbar.jsp for example and still run the function in the create form. Here is the StopRKey function:
function stopRKey(evt) {
// var evt = (evt) ? evt : ((event) ? event : null);
var node = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);
// if ((evt.keyCode == 13) && (node.type=="text")) { return false; }
$(document).ready(function() {
$(window).keydown(function(event) {
if (event.keyCode == 13 && node.type=="text") {
event.preventDefault();
return false;
}
});
});
}
The first 3 lines are the old code. We recycled one of the lines into our new snippet

Related

Detect Tab Key event on textbox on focus

I have a autocomplete textbox in a form and I want to detect whether user has focussed on the textbox from navigating through tab key press.I mean tabindex has been set up on different form fields and user can navigate fields by pressing tabs.Now I want to perform some action when user directly mouse click/foxus on the textbox and some other action when user has focussed on the textbox through tab.
Below is the code I was trying.But no matter everytime code is 0.
$('#tbprofession').on('focus', function (e) {
var code = (e.keyCode ? e.keyCode : e.which);
if (code == 9) {
alert('Tabbed');
}
else
{
alert('Not tabbed');
}
});
This code does not work.
Note:Before marking duplicate it will be good if you understand the question correctly.Else I can make it more clear with more elaborated description.
Anyone can show me some light?
You can try something like that :
$(document).on("keyup", function(e) {
if ($('#tbprofession').is(":focus")) {
var code = (e.keyCode ? e.keyCode : e.which);
if (code == 9) {
alert('I was tabbed!');
} else {
alert('not tabbed');
}
}
});
fiddle : https://jsfiddle.net/xc847mrp/
You can use keyup event instead:
$('#tbprofession').on('keyup', function(e) {
var code = (e.keyCode ? e.keyCode : e.which);
if (code == 9) {
console.log('I was tabbed!', code);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input autofocus>
<input id='tbprofession'>
You could have an array of key events triggered anytime a user presses a key while on your page. Although this makes you think of a keylogger.
Or just keep the last key.
Or a boolean saying if the last key pressed was a TAB or not.
And on focus you can look at that variable.

Layout mess-up when JavaScript "keyup" run in Google Chrome

I create simple function when keyup using JavaScript like so :
<script>
//when press enter, submit this form, when press shift and enter create new line
$("#text_reply1778").keyup(function(e) {
var textVal = $(this).val();
if(e.which == 13 && e.shiftKey) {
//here create new line
}
else if (e.which == 13) {
e.preventDefault();
var text_input = $("#text_reply1778").val();
if(text_input != '') { //dont submit if value is empty
$('#reply1778').ajaxSubmit( {
target: '#reply_output1778',
success: function() {
//do somthing here
}
});
}
}
});
</script>
When I run this using browser Google Chrome Version 26.0.1410.43 my layout will mess-up but this not happen when I'm using Firefox.
You can try from here (full code) chat1.html , then type any message inside textarea(chat box) then you will see layout will mess-up.
So how to avoid this? Any method that I can use? I tried to replace keyup with keypress but the result was still the same.

override existing onkeydown function

My extensions go through every input entered on an on any website that is loaded.
What I do is I consider every onkeydown and manipulate it if it has some value.
my background js file contains the following:
document.onkeydown = returnKey;
function returnKey(evt) {
var evt = (evt) ? evt : ((event) ? event : null);
var node = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);
if ( node.value == 'fi' ) { evt.srcElement.value = "??"; }
}
My problem is when I have websites that already contains onkeydown function in their innerHTML webpage.
for instance:
taken from facebook's homepage:
<textarea class="uiTextareaAutogrow input" onkeydown="Bootloader.loadComponents(["control-textarea"], function() { TextAreaControl.getInstance(this) }.bind(this));
the switching of node.value == 'fi' in ?? is not executing since their onkeydown="Bootloader...runs before my document.onkeydown.
How do I cause my function to run before their onkeydown is executed?
Instead of document.onkeydown = returnKey;, use
document.addEventListener('keydown', returnKey, true);
The most important part of this line is the third argument. When the value of this parameter is true, the event listener is triggered at capturing phase, which cannot be prevented using event.preventDefault(); or event.stopPropagation();.

How to open popover with keyboard shortcut? [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Keyboard shortcuts with jQuery
I want to display a popover window using a shortcut key instead of clicking the icon on the toolbar.
Do you have any good idea?
Thank you for your help.
Abody97's answer tells you how to determine if a certain key combo has been pressed. If you're not sure how to get that key combo to show the popover, this is what you need. Unfortunately, Safari makes this needlessly complicated.
In the global script, you'll need a function like the following to show a popover, given its ID and the ID of the toolbar item that should show it:
function showPopover(toolbarItemId, popoverId) {
var toolbarItem = safari.extension.toolbarItems.filter(function (button) {
return button.identifier == toolbarItemId && button.browserWindow == safari.application.activeBrowserWindow;
})[0];
var popover = safari.extension.popovers.filter(function (popover) {
return popover.identifier == popoverId;
})[0];
toolbarItem.popover = popover;
toolbarItem.showPopover();
}
You'll also need code to call this function in your global script's message listener, like the following (this sample does not assume you already have a message listener in place):
safari.application.addEventListener('message', function (e) {
if (e.name == 'Show Popover') {
showPopover(e.message.toolbarItemId, e.message.popoverId);
}
}, false);
Finally, in your injected script, the function that listens for the key combo needs to call dispatchMessage, as below:
safari.self.tab.dispatchMessage('Show Popover', {
toolbarItemId : 'my_pretty_toolbar_item',
popoverId : 'my_pretty_popover'
});
(Stick that in place of showPopUp() in Abody97's code sample.)
Note: If you only have one toolbar item and one popover (and never plan to add more), then it becomes much simpler. Assuming you've already assigned the popover to the toolbar item in Extension Builder, you can just use
safari.extension.toolbarItems[0].showPopover();
in place of the call to showPopover in the global message listener, and omit the message value in the call to dispatchMessage in the injected script.
Assuming your shortcut is Ctrl + H for instance, this should do:
var ctrlDown = false;
$(document).keydown(function(e) {
if(e.keyCode == 17) ctrlDown = true;
}).keyup(function(e) {
if(e.keyCode == 17) ctrlDown = false;
});
$(document).keydown(function(e) {
if(ctrlDown && e.keyCode == 72) showPopUp(); //72 is for h
});
Here's a reference for JavaScript keyCodes: little link.
Here's a little demo: little link. (It uses Ctrl + M to avoid browser-hotkey conflicts).
I believe this could help you: http://api.jquery.com/keypress/
In the following example, you check if "return/enter" is pressed (which has the number 13).
$("#whatever").keypress(function(event) {
if( event.which == 13 ) {
alert("Return key was pressed!");
}
});

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();
}
}

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