I have a table and I use select menu in each row for different actions for that specific row.
For example:
$(document).on('change', '.lead-action', function() {
// Do stuff
}
this method gets the value of the selected option. Based on the selected value, I display different popups. When the user leaves the page, the select menu retains the previously selected option.
Sometimes users click on the same option in the select menu. When they do, the above code doesn't work.
Is there a way to invoke the code block above if the same option in the select menu is selected?
I'm gathering that you just want the dropdown to fire anytime a selection is made. If so, check out the answer to Fire event each time a DropDownList item is selected with jQuery.
See my updated answer below:
You can use this small extension:
$.fn.selected = function(fn) {
return this.each(function() {
var clicknum = 0;
$(this).click(function() {
clicknum++;
if (clicknum == 2) {
clicknum = 0;
fn(this);
}
});
});
}
Then call like this:
$(".lead-action").selected(function(e) {
alert('You selected ' + $(e).val());
});
Update:
I'm actually rather unhappy with the original script. It will break in a lot of situations, and any solution that relies on checking the click count twice will be very fickle.
Some scenarios to consider:
If you click on, then off, then back on, it will count both clicks and fire.
In firefox, you can open the menu with a single mouse click and drag to the chosen option without ever lifting up your mouse.
If you use any combination of keyboard strokes you are likely to get the click counter out of sync or miss the change event altogether.
You can open the dropdown with Alt+↕ (or the Spacebar in Chrome and Opera).
When the dropdown has focus, any of the arrow keys will change the selection
When the dropdown menu is open, clicking Tab or Enter will make a selection
Here's a more comprehensive extension I just came up with:
The most robust way to see if an option was selected is to use the change event, which you can handle with jQuery's .change() handler.
The only remaining thing to do is determine if the original element was selected again.
This has been asked a lot (one, two, three) without a great answer in any situation.
The simplest thing to do would be to check to see if there was a click or keyup event on the option:selected element BUT Chrome, IE, and Safari don't seem to support events on option elements, even though they are referenced in the w3c recommendation
Inside the Select element is a black box. If you listen to events on it, you can't even tell on which element the event occurred or whether the list was open or not.
The next best thing is to handle the blur event. This will indicate that the user has focused on the dropdown (perhaps seen the list, perhaps not) and made a decision that they would like to stick with the original value. To continue handling changes right away we'll still subscribe to the change event. And to ensure we don't double count, we'll set a flag if the change event was raised so we don't fire back twice:
Updated example in jsFiddle
(function ($) {
$.fn.selected = function (fn) {
return this.each(function () {
var changed = false;
$(this).focus(function () {
changed = false;
}).change(function () {
changed = true;
fn(this);
}).blur(function (e) {
if (!changed) {
fn(this);
}
});
});
};
})(jQuery);
Instead of relying on change() for this use mouseup() -
$(document).on('mouseup', '.lead-action', function() {
// Do stuff
}
That way, if they re-select, you'll get an event you can handle.
http://jsfiddle.net/jayblanchard/Hgd5z/
Related
I'm trying to put a link on a selectize dropdown in order to allow the user make an operation other than select an item while still allowing that the user selects the item as main option.
Here is an example of what I want to achieve (but is not working as expected):
What I did is plainly insert links on the HTML. But it's not working, I suppose that for some kind of event propagation stop, is it possible to achieve with selectize?
Nobody did answer yet and I think there's more to say about, so, here is an example of what I did:
render: {
option: function(item) {
return '<div><span>'+item.label+'</span>'
+ '<div class="pull-right">'
+ 'Link'
+ '</div></div>';
}
}
As you can see, I did change the "option" renderization, and inserted a link in plain HTML. The problem is that -as shown on image- when I do click the link, the browser does not follow the link, but executes the default action for selectize, which is selecting the clicked element.
What I want to achieve is to make it follow the link when clicked.
Here is a fiddle of what I did: http://jsfiddle.net/uetpjpa9
The root problem is that Selectize has mousedown and blur handlers that are dismissing the dropdown before the mouseup event that would complete the click that your link is waiting for from ever occurring. Avoiding this without direct support from Selectize is not easy, but it is possible thanks to its plugin system and the amount of access it gives you to Selectize internals.
Here's a plugin that allows a dropdown element with the class clickable to be clicked on. (demo)
Selectize.define('option_click', function(options) {
var self = this;
var setup = self.setup;
this.setup = function() {
setup.apply(self, arguments);
var clicking = false;
// Detect click on a .clickable
self.$dropdown_content.on('mousedown click', function(e) {
if ($(e.target).hasClass('clickable')) {
if (e.type === 'mousedown') {
clicking = true;
self.isFocused = false; // awful hack to defuse the document mousedown listener
} else {
self.isFocused = true;
setTimeout(function() {
clicking = false; // wait until blur has been preempted
});
}
} else { // cleanup in case user right-clicked or dragged off the element
clicking = false;
self.isFocused = true;
}
});
// Intercept default handlers
self.$dropdown.off('mousedown click', '[data-selectable]').on('mousedown click', '[data-selectable]', function() {
if (!clicking) {
return self.onOptionSelect.apply(self, arguments);
}
});
self.$control_input.off('blur').on('blur', function() {
if (!clicking) {
return self.onBlur.apply(self, arguments);
}
});
}
});
To use it, you need to pass the plugin option to the selectize call (.selectize({plugins:['option_click']})) and add the clickable class to links in your dropdown template. (This is fairly specific. If there are nested elements, make sure clickable is on the one that will first see the mousedown event.)
Note that this is a fairly hackish approach that may have edge cases and could break at any time if something about how Selectize dispatches events changes. It would be better if Selectize itself would make this exception, but until the project catches up to its backlog and becomes more receptive to requests and PRs this may be the most practical approach.
I have following jquery code, where on click of a check box I will show a popup value.
Except in IE,in all other browser it works as expected. That is, on change the check box will be checked and the popup will be opened.
However in IE8 its not getting checked, however popup is displayed properly.
Code :
$('#TAndC').change(function(){
if( $('input[name="TAndC"]').is(':checked'))
{
$('#TandCBox').show();
var termsandcondition = GetEnum().TermsandConditionsPageId;
var actionURL = '#Url.Action("ShowTAndC", "Account", new { isFromCheckBox = true })';
$('.popUpForm').load(actionURL);
var msgBox = $('#terms').attr('href');
MaskMsgPopUp(msgBox);
return false;
}
});
If your element is a checkbox and not a dropdown then use click anyway.
If your selector is referring to a dropdown use click if you need to support IE8 and older.
See why that is below.
According to the MSDN for change/onchange, the event is not triggered until the change is committed.
In addition the event is also not triggered when the value is changed programmatically.
To quote:
This event is fired when the contents are committed and not while the
value is changing. For example, on a text box, this event is not fired
while the user is typing, but rather when the user commits the change
by leaving the text box that has focus. In addition, this event is
executed before the code specified by onblur when the control is also
losing the focus. The onchange event does not fire when the selected
option of the select object is changed programmatically. Changed text
selection is committed.
To invoke this event, do one of the following:
Choose a different option in a select object using mouse or keyboard navigation.
Alter text in the text area and then navigate out of the object.
If you must support IE8 and older, you are probably better of to use the click event instead which get's triggered when you release the mouse and your new choice is selected.
instead of .change use below code and try
$(document).ready(function(){
$(document).on('click','#TAndC',click_function){
if( $('input[name="TAndC"]').is(':checked'))
{
$('#TandCBox').show();
var termsandcondition = GetEnum().TermsandConditionsPageId;
var actionURL = '#Url.Action("ShowTAndC", "Account", new { isFromCheckBox = true })';
$('.popUpForm').load(actionURL);
var msgBox = $('#terms').attr('href');
MaskMsgPopUp(msgBox);
return false;
}
});
});
I was asked to refresh a page (and it's data) based on the user's selection of an option in a select box.
I know that using the onChange event is the standard way to detect that a user changed their selection in a selectbox and I've done this a lot:
$("#provider").change(function(){
var selectedprovider = $('#provider').val();
//... Do something
});
I've also seen cases where certain browsers (IE) fire change events when a mouse wheel or arrow keys are being used to interact with the selectbox, not the actual event of changing an option selection.
Is there a better way to deal with this kind of scenario? For example checking to see if the array index of the selected option has changed? Not sure that there is an event for that specifically.
I am thinking it might be best to simply add a submit button next to the select box and stop trying to rely on the onChange event for select boxes.
How are you all handling this scenario?
One way would be to check to see if the value has actually changed at all since you registered your event. That would be one way to determine if the value is different or not.
Here's an example: http://jsfiddle.net/p9v7x/1/
$(function () {
var lastVal = $('#target').val();
$('#target').on('change', function () {
var self = $(this);
if (self.val() === lastVal) {
// don't do anything if it's the same:
console.log('same!');
} else {
// only do your action in this case:
console.log(self.val());
}
});
});
I've got a base background image and two checkboxes. I need replace the background image (via toggle class) with the correct class depending on which checkbox is selected. If both checkboxes are selected I need it to show the black background.
http://jsfiddle.net/2k96D/6/
$('#ax_lab').change(function () {
if ($('#ax_ov').is(':checked')) {
$('.axial').toggleClass('axial_all');
} else{
$('.axial').toggleClass('axial_lab');
}
});
$('#ax_ov').change(function () {
if ($('#ax_lab').is(':checked')) {
$('.axial').toggleClass('axial_all');
} else{
$('.axial').toggleClass('axial_over');
}
});
My fiddle works perfectly when I select and deselect in the same order, however, if I de-select the checkboxes in a different order than the order I selected them in, it doesn't default back to the original class. I know there must be a flaw in my logic, I'm just having trouble finding it. Any thoughts?
You need to be more explicit with the logic. Here's what I did:
$(document).ready(function () {
function updateAxialStatus() {
var axOv = $('#ax_ov').prop('checked'),
axLab = $('#ax_lab').prop('checked');
$('.axial').removeClass('axial_all axial_lab axial_over');
if (axOv && axLab)
$('.axial').addClass('axial_all');
else if (axOv)
$('.axial').addClass('axial_over');
else if (axLab)
$('.axial').addClass('axial_lab');
}
$('#ax_lab, #ax_ov').change(updateAxialStatus);
});
That version just explicitly checks the status of the two checkboxes and updates the class to reflect the status. The same handler can be used for both checkboxes.
Note that old versions of IE may not fire the "change" event for checkboxes until the checkbox loses focus, but you can safely use "click" instead.
Basically, I have drop down menu that looks like this:
<select>
<option>0</option>
<option selected="selected">1</option>
<option>2</option>
<option>3</option>
</select>
I am trying to write a function that is fired even when you select the same option, i.e. even if the drop-down is opened and re-select the selected option, I want it to execute the function.
If you mean selecting with the mouse, you can use mouseup. However, it will fire when the select box is being opened as well, so you'll need to keep track of the amount of times it was fired (even: select is being opened, odd: select is being closed): http://jsfiddle.net/T4yUm/2/.
$("select").mouseup(function() {
var open = $(this).data("isopen");
if(open) {
alert(1);
}
$(this).data("isopen", !open);
});
pimvdb's answer was a big help for me but I added a couple of extra bits to deal with keyboard activation and navigation away from the select:
$('select').mouseup(... as in pimvdb... )
.blur(function() {
$(this).data('isopen', false);
}).keyup(function(ev) {
if (ev.keyCode == 13)
alert(1);
});
The blur handler deals with navigating away from the select while the dropdown is open, the keyup handler deals with when you change the select's value with the keyboard. The behaviour is then that the user is only considered to have finally selected the value when they click return to navigate away. If you want a different behaviour with the keyboard that shouldn't be hard to do.
select isn't meant to be used this way — there are hacks you can use to get this kind of behavior in most cases, like tracking mouse and keyboard events on the select, but there’s no guarantee they’ll keep working, or work on every platform.
I would suggest either…
Resetting the select to its default value on change, and using some other text to indicate which one is “selected”, or
using a control other than select.
Can you describe the end goal a little more detail?
An alternative, use the .blur() event -- http://jsfiddle.net/VKZb2/4/
Pro
This will fire either way.
Con
It only fires once the control loses focus.
I ran into the same issue. I just added a click event to the option tags and change the value of the select:
$("#select option").mouseup(function() {
$(this).parent().val($(this).attr("value"));
// do something.
});
NOTE: This doesn't work on iPhone or iPad devices.
Try the below solution. It accounts for loss of focus via mouse click or Esc key.
// whether or not dropdown is opened
var open = false;
$("#selectElement").on("click", function() {
open = !open;
if (!open)
{
console.log("option has been selected/re-selected");
}
});
// update dropdown state upon loss of focus
$("#selectElement").on("blur", function() {
if(open){
open = !open;
}
});
// update dropdown state upon Esc key of focus
$(document).keyup(function(e) {
if (e.keyCode == 27) {
if(open){
open = !open;
}
}
});