I have added change event on the input field so that whenever user enters the text into it, so other task should happen, it works but when i click outside the input field.I don't know whether it is default behavior or i am doing some thing wrong. I tried using keyup and keydown events and it works as expect.
Please suggest.
Here is my code:
$("#mobile-number").on('change',function(){
// some other code
});
The change event fires when an elements value changes.
For select boxes, checkboxes, and radio buttons, the event is fired immediately when the user makes a selection with the mouse, but for the other element types the event is deferred until the element loses focus.
In other words, on an input, the change event fires when the element loses focus, not when you type, and that is the default behaviour.
That's why there are key events as well, and on modern browsers you can catch most changes to an input with the input event
$("#mobile-number").on('input',function(){ ...
Yes, it is the desired behavior.
Change Event
The change event is fired for , , and
elements when a change to the element's value is committed by the
user. Unlike the input event, the change event is not necessarily
fired for each change to an element's value.
Depending on the kind of form element being changed and the way the
user interacts with the element, the change event fires at a different
moment:
When the element is activated (by clicking or using the keyboard) for and ;
When the user commits the change explicitly (e.g. by selecting a value from a 's dropdown with a mouse click, by selecting a
date from a date picker for , by selecting a file
in the file picker for , etc.);
When the element loses focus after its value was changed, but not commited (e.g. after editing the value of or ).
Try using input event:
$(function() {
$("#mobile-number").on('input', function() {
$("#copy").val(this.value);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<input type='text' id='mobile-number' />
<input type='text' id='copy' readonly/>
Try this:( If i really understand your problem )
jQuery(document).on('change', '#mobile-number', function() {
// some other code
});
for type event:
jQuery(document).on('keyup', '#mobile-number', function() {
// some other code
});
You should provide your selector to the .on function:
$(document).on('change', '#mobile-number', function() {
// some other code
});
Related
I want to clear out a textbox when I call:
$('#textBox').val(''); or $('#textBox').empty();
Originally, when I would manually backspace and delete the text out of the text box, the on change function would fire. If I run $('#textBox').val('') above, on change does not fire:
$(document).ready(function() {
$('#textBox').on('change', function(){
Why is this?
Use trigger, like this:
$("#testBox").val("").trigger("change");
When you change the value programmatically, just trigger the change event using trigger.
$("#myid").trigger("change");
It's not jQuery that doesn't fire the event, it's the browser. If you look it up in the specs you'll see the definition of the change event:
change
The change event occurs when a control loses the input focus and its value has been
modified since gaining focus. This event is valid for INPUT, SELECT, and
TEXTAREA. element.
Bubbles: Yes
Cancelable: No
Context Info: None
As already posted, your problem can be mitigated by triggering the event manually via trigger().
Using the new input="color" element within Chrome triggers a new popup dialog:
I would like to know if there is an event handler that fires as soon as the value in this preview window changes and not only after clicking on "OK"
jQuery('#colorinput').on('change', function() { // fires only after clicking OK
jQuery('#main').css('background-color', jQuery(this).val());
});
See http://jsfiddle.net/Riesling/PEGS4/
What you are looking for is the input event.
Your modified fiddle should now work in all (decent) browsers:
$('#colorinput').on('input', function() { ... } )
You really want input event per HTML spec.
Nothing guarantees change event to fire before the input element has lost focus.
"The input event fires whenever the user has modified the data of the control. The change event fires when the value is committed, if that makes sense for the control, or else when the control loses focus. "
To get the value of color input, you should use the event attribute onchangeprovided in w3school
<input name="eventColor" type="color" onchange="getColorVal(eventColor.value)"/>
and define a function that handle the event
function getColorVal(colorValue){
alert(colorValue);
}
I am using Jquery to set some flag whenever input elements value get changed.
I wrote a simple script which is working fine but I observed that the function get called only when control get out of the input element.If user types something and keeps the control in the same input then function is not called.
I want to execute the function whenever input elements value get changed irrespective of where the control is.
Here is my code
$("input,textarea").live('change',function ()
{
// Set flag
});
I am using live() to bind change() method to dynamicaly added input elements.
~ Ajinkya.
Semantically, the change event is triggered when the element loses focus. That's when its value property is updated.
If you want to work whenever a key is pressed, use the keypress event:
$("input,textarea").live('keypress',function ()
{
// Set flag
});
Use keyup/keydown event instead of change:
$("input,textarea").live('keyup',function ()
{
// Set flag
});
The 'change' event works as lonesomeday said.
But if you want to set your flag whenever something occurs, you can create your own event.
For instance, with your custom event, you can set your flag if the user change the field, press a key, focus on the element or anything you want.
To know more about that: http://brandonaaron.net/blog/2009/06/4/jquery-edge-new-special-event-hooks
When using jquery .change on an input the event will only be fired when the input loses focus
In my case, I need to make a call to the service (check if value is valid) as soon as the input value is changed. How could I accomplish this?
UPDATED for clarification and example
examples: http://jsfiddle.net/pxfunc/5kpeJ/
Method 1. input event
In modern browsers use the input event. This event will fire when the user is typing into a text field, pasting, undoing, basically anytime the value changed from one value to another.
In jQuery do that like this
$('#someInput').bind('input', function() {
$(this).val() // get the current value of the input field.
});
starting with jQuery 1.7, replace bind with on:
$('#someInput').on('input', function() {
$(this).val() // get the current value of the input field.
});
Method 2. keyup event
For older browsers use the keyup event (this will fire once a key on the keyboard has been released, this event can give a sort of false positive because when "w" is released the input value is changed and the keyup event fires, but also when the "shift" key is released the keyup event fires but no change has been made to the input.). Also this method doesn't fire if the user right-clicks and pastes from the context menu:
$('#someInput').keyup(function() {
$(this).val() // get the current value of the input field.
});
Method 3. Timer (setInterval or setTimeout)
To get around the limitations of keyup you can set a timer to periodically check the value of the input to determine a change in value. You can use setInterval or setTimeout to do this timer check. See the marked answer on this SO question: jQuery textbox change event or see the fiddle for a working example using focus and blur events to start and stop the timer for a specific input field
If you've got HTML5:
oninput (fires only when a change actually happens, but does so immediately)
Otherwise you need to check for all these events which might indicate a change to the input element's value:
onchange
onkeyup (not keydown or keypress as the input's value won't have the new keystroke in it yet)
onpaste (when supported)
and maybe:
onmouseup (I'm not sure about this one)
With HTML5 and without using jQuery, you can using the input event:
var input = document.querySelector('input');
input.addEventListener('input', function()
{
console.log('input changed to: ', input.value);
});
This will fire each time the input's text changes.
Supported in IE9+ and other browsers.
Try it live in a jsFiddle here.
As others already suggested, the solution in your case is to sniff multiple events.
Plugins doing this job often listen for the following events:
$input.on('change keydown keypress keyup mousedown click mouseup', handler);
If you think it may fit, you can add focus, blur and other events too.
I suggest not to exceed in the events to listen, as it loads in the browser memory further procedures to execute according to the user's behaviour.
Attention: note that changing the value of an input element with JavaScript (e.g. through the jQuery .val() method) won't fire any of the events above.
(Reference: https://api.jquery.com/change/).
// .blur is triggered when element loses focus
$('#target').blur(function() {
alert($(this).val());
});
// To trigger manually use:
$('#target').blur();
If you want the event to be fired whenever something is changed within the element then you could use the keyup event.
There are jQuery events like keyup and keypress which you can use with input HTML Elements.
You could additionally use the blur() event.
This covers every change to an input using jQuery 1.7 and above:
$(".inputElement").on("input", null, null, callbackFunction);
I have a textbox that is wired up using jQuery UI 1.8.4 autocomplete. I have the select event wired up so when the user chooses an item from the list it calls another JavaScript function that issues an ajax request to save the data and update an XML document.
On the same textbox there is an onBlur event so that if the user manually types the data in and tabs off the textbox without choosing an autocomplete item it also performs the update.
When the user selects an item from the autocomplete list it causes onBlur to fire which overrides the select event, thus the only data that gets updated is whatever is in the textbox that the user typed, and since the select event doesn't fire the contents of the textbox don't get updated.
I've tried using the change event with the same results.
Is there a way to ensure the select event gets fired and also implement some functionality that will emulate an onBlur in the case where a user types the value in rather than selecting it?
The problem is when the user interacts with the autocomplete menu, the textbox loses focus and the blur event fires. There is no way to really detect if the user is in the autocomplete control unless the component tells you that.
If the autocomplete control you are using does not have methods to tell you when it is closed, than you are probably stuck with using a setTimeout to wait a bit before you fire your code.
I think The onselect is always fired
"BUT" its fired only after onblur event of the textbox.
And this happens only when you use the mouse to select the autocomplete item and not through selecting the item by keyboard.
You may undo the update made on onblur with the select event depending on wether mouse click or keyboard select is made.
select: function (event, ui) {
if (event.originalEvent.originalEvent.type == 'click') {
//undo the onblur event happened by an ajax call here
//$("#txtbox").val() will still be available to do an undo
}
//do the actual onselect function here
}