I have a grid with three read-only columns. Whenever user goes in there and try to edit by pressing backspace, I need to alert by giving a message. I am using this script and it doesn't work? Can anyone correct me?
$(document).ready(function () {
$('#txtCode').bind('keypress', function (e) {
if (e.which == 8) {
alert('The column is read-only and is not editable');
}
}
});
instead of keypress try with keyup or keydown with .on() method:
$('#txtCode').on('keyup keydown', function (e) {
You can bind multiple events like this too.
and one more thing closing of $('#txtCode') seems to be missing });
$(document).ready(function () {
$('#txtCode').on('keyup keydown', function (e) {
if (e.which == 8) {
alert('The column is read-only and is not editable');
}
}); //<----");" this is the closing you misssed this
});
See the fiddle in action
If this is all the code you are testing, you weren't closing the function properly, annotated in my posted code. Also use keyup instead of keypress
$(document).ready(function () {
$('#txtCode').bind('keyup', function (e) {
if (e.which == 8) {
alert('The column is read-only and is not editable');
}
}); /*<-- You weren't closing your function properly*/
});
Fiddle
You do indeed need to add a return false statement to ensure the character doesn't get deleted anyway. I also took it a step further and extended jQuery with a preventKeyUsage method.
$(document).ready(function () {
$.fn.preventKeyUsage = function (key, message) {
return this.each(function () {
$(this).on('keydown', function (e) {
return (e.keyCode === key) ? (function () {
alert(message);
return false;
})() : true;
});
});
};
$('#txtCode').preventKeyUsage(8, 'The column is read-only and is not editable');
});
New Fiddle
Working code is:
Java Script Code:
$(document).ready(function () {
$('#txtCode').bind('keypress keydown', function (e) {
if (e.which == 8) {
alert('The column is read-only and is not editable');
}
});
});
Here is the updated code
<input type="text" id="txtCode" />
$(document).ready(function () {
$('#txtCode').bind('keydown', function (e) {
if (e.which == 8) {
alert('The column is read-only and is not editable');
return false;
}
});
});
Fiddle Demo
Try this
$(document).ready(function () {
$('#txtCode').on('keyup', function (e) {
if (e.which == 8) {
alert('The column is read-only and is not editable');
}
});
});
DEMO (Working on Firefox & Chrome)
$('#textbox').keydown(function(event){
if(event.keyCode == 8){
alert("Backspace not allowed..");
return false;
}
});
http://jsfiddle.net/xF9jL/1/
You are missing }); of keypress. google chrome have issues with keypress, u can try keydown instead
$(document).ready(function () {
$('#txtCode').bind('keydown', function (e) {
if (e.which == 8) {
alert('The column is read-only and is not editable');
}
});
});
To use delete ,arrows, backspace keys in Chrome you must use keydown. keypress on these keys work only in Firefox and Opera.
DEMO
You can probably solve the underlying issue by either not using an element that accepts input, or by using the disabled attribute:
<textarea name="example" disabled>Some text</textarea>
If you are posting back to the sever, you should assume the user has edited the field, no matter what you do to prevent it.
keypress event won't give keycodes for all keys in all browsers . Better use keyup or keydown event which gives keycode for all keys in all browsers
In order to understand the difference between keydown and keypress, it is useful to understand the difference between a "character" and a "key". A "key" is a physical button on the computer's keyboard while a "character" is a symbol typed by pressing a button. In theory, the keydown and keyup events represent keys being pressed or released, while the keypress event represents a character being typed. The implementation of the theory is not same in all browsers.
Related
I need to update $scope.CtrlKeypressed value if user pressed alt key it is set to try if he release alt key then ift will be set false but I am stuck here on release. It is not working i am using following code. I unable to do this with angular then I code jQuery code for it but this is also not working
document.body.addEventListener('keydown', function (e) {
if (e.keyCode==18)
{
alert("Keydown")
$scope.ISCtrlPressed = true;
$scope.$apply();
}
});
document.body.addEventListener('keyup', function (e) {
$scope.ISCtrlPressed = false;
$scope.$apply();
});
Can someone guide me how I need to work for this?
Look at this codepen with your code modified. You will get into console the I was pressed message as long as you keep the key pressed and receive an alert when release the key. It also depends on your operating system and how you have configured the keyboard(number of repetitions if kept pressed).
http://codepen.io/TunderScripts/pen/YpxWLR?editors=0011#0
document.body.addEventListener('keydown', function(e) {
if (e.keyCode == 18) {
console.log('I was pressed');
}
});
document.body.addEventListener('keyup', function(e) {
alert('aaaa come back')
});
<script>
document.body.addEventListener('keydown', function (evt) {
if (evt.keyCode == 18)
{
alert("Keydown");
alert("Keyup");
}
});
</script>
I want to split blur and enter key functions. So I mean that I want jquery to do another function on blur and another on enter key. If enter key was clicked then blur mustn't work, so blur function mustn't execute. This is my jquery code :
$(document).ready(function(){
$("#comment_textarea").on("keypress blur", function(e) {
if(e.type == "keypress" & e.which == 13){
alert("type: "+e.type+"||which: "+e.which);
}
else if(e.type != "keypress" ){
alert("type: "+e.type+"||which: "+e.keycode);
}
});
})
This code alerts two times. First is blur and second is enter click. Have anyone got any ideas.
Thanks.
Since you show an alert the textarea isn't focused anymore, the blur event will be triggered then.
$(function () {
$("#comment_textarea").on("keydown", function (e) {
if (e.keyCode == 13) {
// do your Enter key stuff
e.preventDefault();
}
});
$("#comment_textarea").on("blur", function (e) {
// handle the blur
});
});
Trying to double up probably isn't the best way.
I'm using select2 to present an editable selectbox. When user writes a statement which does not appear in the list(select2, data), I show a button to add this statement to the list.
Forcing users to click the button seems to me a little bit frustration. Is it possible to capture enter key in select2? I want to make user able to add his/her new statements into the list just by pressing enter key.
$('select2-search-field > input.select2-input').on('keyup', function(e) {
if(e.keyCode === 13)
addToList($(this).val());
});
I'm using Select2 4.0.3 and this works form me:
$(document).on('keyup', '.select2-search__field', function (e) {
if (e.which === 13) {
alert('Pressed enter!');
}
});
I am using Select2 4.0. This works for me;
$('.select2-search__field').on('keyup', function (e) {
if (e.keyCode === 13)
{
alert('Enter key');
}
});
None of these worked in Select2 4.0.6-rc1, but this did:
$('#mySelect2').on('select2:select', function (e) {
var data = e.params.data;
console.log(data);
});
It's detailed in the manual here.
This code can help you with class-based selections:
$('.select2-selection').on('keyup', function(e) {
var YOUR_SELECT2_CUSTOM_CLASS = $(this).attr('aria-labelledby').includes('YOUR_SELECT2_CUSTOM_CLASS')
if (YOUR_SELECT2_CUSTOM_CLASS && e.keyCode === 13) {
alert($(".YOUR_SELECT2_CUSTOM_CLASS").val())
}
});
Or you can use this:
$("YOUR_CUSTOM_CLASS").bind("change keypress", function() {
if (window.event.keyCode === 13) {
alert("Enter Captured")
}
})
If legacy select2 is used (some 3.5.4), then this option can be used:
$('#mySelect2').on('select2-selected', function (e) {
console.log(e.params);
// keypress enter script
});
It helped me a lot.
If you have two select2s on the page, then this is a great option!
I have a problem I can't seem to sort out.
I have a form with a custom styled button (input type=button). When typing in the text field, I want people to be able to press the TAB key and go to the button. However, it won't use a tab-index so my solution was to highlight the label and change the CSS to give the button a new border color. However, the border color will not change on keypress in any browser other than Firefox.
Here is what I have:
$(function() {
$("#email").bind("keypress", function(e) {
if (e.keyCode == 13) {
send();
return false;
};
if (e.keyCode == 9) {
$("#submit_btn").removeClass('submit1').addClass('submit1after');
};
});
};
The first enter keypress is to serialize and email the form and all.
I can't seem to get it to work for the life of me. What am I doing wrong? Is there a better solution to what I'm trying to accomplish?
Thanks for taking the time,
Armik
Use keydown instead, for me that works (see demo: http://jsfiddle.net/npGtX/2/)
$(function () {
$("#email").bind("keydown", function (e) {
if (e.keyCode == 13) {
send();
return false;
};
if (e.keyCode == 9) {
$("#submit_btn").removeClass('submit1').addClass('submit1after');
};
});
};
Also I found this: Suppressing keyPress for non-character keys?
keypress is not necessarily triggered when the keypress is not a
character. So the browser may not trigger an event on backspace, F1,
the down key, etc.
You can use the keyup event and event object's which property, jQuery normalizes the which property and it's cross-browser:
$(function() {
$("#email").bind("keyup", function(e) {
if (e.which == 13) {
send();
return false;
};
if (e.which == 9) {
$("#submit_btn").toggleClass('submit1 submit1after');
};
});
};
$(function() {
$("#email").keypress(function(e) {
if (e.keyCode == 13 || e.which== 13) {
send();
return false;
};
if (e.keyCode == 9 || e.which== 9) {
$("#submit_btn").removeClass('submit1').addClass('submit1after');
};
});
};
This is meant to allow a user to type in a message and then press enter to send it. This should clear the box so that the user can type in a new message. The problem is that the standard result of pressing enter (creation of a newline) is occurring after the .empty() event....so the text vanishes and is replaced by a newline, which is quite undesirable. How can I circumvent this?
$('#messagebox').keypress(function(event) {
if (event.keyCode == '13') {
send();
$('#messagebox').empty();
}
});
You can prevent the default action of the keypress via event.preventDefault() (or return false from your event handler function, which is jQuery shorthand for preventDefault + stopPropagation):
Live example | source:
HTML:
<p>Pressing Enter will clear the text area below:</p>
<textarea id="messagebox" rows="10" cols="50"></textarea>
JavaScript:
jQuery(function($) {
$("#messagebox").focus().keypress(function(event) {
if (event.keyCode === 13) {
$(this).val("");
event.preventDefault();
}
});
});
FWIW, I'd probably use val with an empty string rather than empty to clear the textarea, since val is specifically for setting the value of form fields — but if empty() is working for you...
$('#messagebox').keypress(function(event) {
if (event.keyCode == '13') {
event.preventDefault();
send();
$(this).empty();
}
});
demo
$('#messagebox').on('keydown',function(e) {
if (e.which === 13) {
send();
$(this).val('');
e.preventDefault();
}
});