On my form, I have a DropDown, when a value is selected, I fire some JavaScript that populates some visible <input type="text" /> fields (under neath the drop down).
The problem is, I also want to run some JavaScript function whenever the value of one of these inputs changes, I want this function to run even if the text input is changed by the drop down selection.
Here is my current code:
jQuery(document).ready(function() {
$('#mainPane').on('change', '#formElementFromEmail', function(event){
var collectFromDropDown = $('#formElementFromEmail');
persistHiddenInputForCollectFromValue();
});
});
I suspect the change event is not being fired because no one has manually changed the value of the field in question. How can I overcome this?
Since you're using jQuery, you can trigger the event:
$('#mainPane').trigger('change');
you can simulate change event by
var element = document.getElementById('formElementFromEmail');
element.onchange();
Related
I have a input type="text" and next to that a button which opens up a calendar on click. When a value is selected in calendar textbox ix populated.
I would like to handle on change of textbox to enable other controls.
change, input etc events are triggered only if use manually enters values in the text box. But in my case I am not touching the input textbox.
Thanks.
Use jquery change event.
$("input").change(function(){
//do something
})
Update:
As .change event doesn't get fired when you change value using any javascript method, there is a work around.
When you change the date, you can trigger an event to the input element like $("input").keyup() and listen using:
$("input").keyup(function(){
// input updated
})
codepen example: https://codepen.io/azharuddinkhan8898/pen/MNrLad
I'm trying to make something like a shopping cart, but just with an order form.
I am using this pattern to fire input changes, but it doesn't work in my case.
Here what I have first.
<div class="ingrid__table-row">
<div class="ingrid__table-data ingrid__table-item">Lemon</div>
<div class="ingrid__table-data ingrid__table-weight">15g</div>
<div class="ingrid__table-data ingrid__table-price">10</div>
</div>
With jQuery, on click, I take the data from ingrid__table-data and add to the suitable input into .order__container.
Then, on the same click, a number input is appended, which will enable to choose the quantity of the selected products.
$('.order__container').append(`<input class="bul-order-info__input bul-order-info__qnt" type="number" name="Quantity" min="1" value="1">`)
And it appears on a webpage in the order form.
I need to detect the value changes of "number type input" and fire other events.
But the input changes are not detected, although if I create the same input element manually in HTML document, these changes are detected perfectly as it's shown here
How can I achieve this behavior?
My best guess based on the info you provided is that you are trying to attach the on change event to the dynamically created inputs on this way:
$('.bul-order-info__input').change( function () {...} );
But with the code before you are aren't applying those changes to any input because none of them exists when you are creating the event handlers, so you have to bind the events to an existing element like this:
$(document).on('change', '.bul-order-info__input', function() {...});
The element doesn't have to be always document, but I tend to use it, because is the only one that always will be present. However, something like this is also valid:
$('.order__container').on('change', '.bul-order-info__input', function() {...});
I added the following code, and I am getting the text to update, but only when clicking outside of the textarea.
$('.form__input-el').change(function() {
$('.form__character-indicator').text($('.form__input-el').val().length);
})
Why is this happening and how can I make it update without clicking outside of the textarea?
you you can use keyup if you want to get change the output immediately
$('.form__input-el').keyup(function() {
$('.form__character-indicator').text($('.form__input-el').val().length);
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<textarea class="form__input-el"></textarea>
<div class="form__character-indicator"></div>
Try with input instead of change this will trigger everytime the user inputs something.
according to jQuery docs: 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
This is why your event appears only on leaving the textareas focus.
https://api.jquery.com/change/
a complete list of the events can be found here:
https://api.jquery.com/category/events/
so you need to use another event, maybe like:
https://api.jquery.com/keydown/
Use a keyup event to update your character count while the user is typing
Try something like this
$('.textarea').on('keyup', function() {
var newCount = $(this).val().length
$('.count').html(newCount)
})
Here is a jsfiddle
Gist
Which event gets triggered when we select from a dropdown which is populated from the cache ( such as usernames and other form values ) in a <input type="text"> .
Detailed
In a form, we can login with multiple username say A,B,ABC . And the browser caches all these values ( w.r.t password remember ). So,if we try to login with A - a drop down pops up giving multiple option say A , ABC -- which event gets triggered once we select any of the options provided.
oninput, onchange, onblur -- none of which seems to get triggered if we select from browser provided drop down.
Help,
Beginner
You can use these events with select.
Cache has nothing to do with the drop down.
What you need is depending on your use.
Generally onchange is used to get the value or call a function when the value changes.
onblur would trigger a function when the drop down losses focus. eg, when you use tab or other methods.
This question is answered here: On input change 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.
easily use select event
example:
$('#test').select(function(){ alert('data changed'); });
I need help on this one:
In the document there are several input fields with <div class="quantity"><input .. >
This is automatically generated by the system and I have no access to alter this.
So I need a way with jQuery to track the onchange function when the input changes.
What is a good way to achieve this?
var updateInput = document.getElementById(".quantity input");
if ( updateInput ????? ) {
alert("Hallo")
};
getElementById does not work on class names. You asked for jquery, why not use change()?
$('.quantity input').change(function() {
alert('Input changed');
});
From the manual:
The change event is sent to an element
when its value changes. This event is
limited to <input> elements,
<textarea> boxes and <select>
elements. 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.
Demo: http://jsfiddle.net/Madmartigan/yzGYU/