I am confused by how ajax:before works when using rails/jquery-ujs.
Does it wait for any given function in the ajax:before to complete before proceeding?
How do I completely cancel the event in jQuery if it fails some condition? (I do not seem to have a pointer to the event)
--
Update: I tried this, which normally works, but not now. =|
.bind('ajax:before', function(evt){
evt.stopImmediatePropagation();
} )
//also tried preventDefault, stopPropagation, etc
I answered my own question. "return false" in the ajax:before will cancel the action
Related
after several rounds of research, I found there is no clear answer about the situation like below:
I have a js file called 'AAA.js', and there is simple code in side like this:
var AAA = {
listenForMenuLayer: function () {
console.log("menu initiated");
$('.nav-menu').on('click', function() { console.log("menu clicked")});
}
init: function(){
this.listenForMenuLayer();
}
};
And in the dart, I wrote like below (using 'dart:js'):
js.context['AAA'].callMethod('init');
Then, when I run it, everything looks fine, the "menu initiated" shows properly, which means the 'listenForMenuLayer' is initiated, but when click on the '.nav-menu', there is nothing happened. (I check many times, there is no spelling error or else)
My question is: Can Dart accept this kind of initiating of external JS event? or we should re-write those JS events at all, please advise, many thanks.
Updates:
I found that if we write the js code like above, the jquery will not be initiated properly, which means all the features begin with '$' will not be functional.
guys, I update it to using 'package:js/js.dart';
#JS('AAA.init')
external void aInit();
then some where, just simply call after including:
aInit();
I have multiple HTML fragments that are inserted into my DOM as the result of AJAX call-backs.
Each of these fragments will contain a text box whose class is "quantity".
What I want to do is to create an "on change" event handler that fires whenever one of these textbox's text value is changed. However, when that event is fired/handled, I need to know WHICH specific textbox was updated.
Okay, using jQuery, I have the following that fires in my "Lists.initHandlers" method:
$(document).on('change', $('#divABC').find(".quantity"), List.quantityChanged);
And my "List.quantityChanged" event handler happily fires when I update the quanity.
The problem is that when I reference "this" within the event handler, I get the whole document, and not the element that triggered the event.
I have tried to capture the element using syntax similar to:
$(document).on('change', $('#divABC').find(".quantity"), {ctrl: this}, List.quantityChanged);
but when I attempt this, the handler is never fired (even when I change the signature to expect an argument).
Any guidance here would be most appreciated.
Thanks
Griff
Try this:
$('.quantity').live('change', function(){
alert('New value: ' + $(this).val());
});
Pass this to your function:
$(document).on('change', $('#divABC').find(".quantity"), function () {
List.quantityChanged(this);
});
I am pulling my hair out dealing with this problem.
These are the code that I used and caused the mentioned problem.
$(document).ready(function () {
$("#at-site-btn").bind("tap", function () {
$.mobile.changePage("view/dialog/at-site.php", { transition:"slidedown", role:"dialog" });
});
$('#at-site-page').live('pagecreate', function(){
var $checked_emp = $("input[type=checkbox]:checked");
var $this = $(this);
var $msg = $this.find("#at-site-msg");
$checked_emp.appendTo($msg);
$checked_emp.trigger('create');
$msg.trigger('create');
$(document).trigger('create');
$this.trigger('create');
$("html").trigger('create');
});
});
Explanation:
The above code is in a file named hod.php. The file contain a number of checkboxes. These checkboxes and be checked simultaneously and when I pressed the #at-site-btn button the at-site.php appear (as a dialog) and display every checked checkboxes.
This is where the problem occurred. When I pressed the back button in the dialog to go back to the previous page and tried to uncheck those checkboxes, the error pops out as mentioned in the title. There are no calls to 'refresh method' in my code so I don't see the way to fix this.
Can anyone please suggest a way to solve this problem?
Am I using it right? (I am very new to jQuery Mobile. If there are some concepts behind using JQM please explain it to me [I've tried read JQM Docs it seems so unclear to me]).
Best regards and thank you very much for your answers.
What version of jQueryMobile are you using? You might need to use pageinit instead of pagecreate. This portion of the jQueryMobile documentation talks about the choices.
For re-painting or creation, the solution that #Taifun pointed out, which looks like:
$("input[type='radio']").checkboxradio();
$("input[type='radio']").checkboxradio("refresh");
worked okay for me, but it didn't paint the controls 100% correctly. Radio buttons didn't get the edges painted with rounded corners.
Before I saw your code, I read here that you can call .trigger('create') on the container object and it worked for me. You are doing that but inside pagecreate instead of in pageinit.
I was actually using a flipswitch checkbox:
<div class="some-checkbox-area">
<input type="checkbox" data-role="flipswitch" name="flip-checkbox-lesson-complete"
data-on-text="Complete" data-off-text="Incomplete" data-wrapper-class="custom-size-flipswitch">
</div>
so had to do this:
$("div.ui-page-active div.some-checkbox-area div.ui-flipswitch input[type=checkbox]").attr("checked", true).flipswitch( "refresh" )
See my full answer here.
I'm using JQuery UI autocomplete feature and I'm facing a problem.
This is my code:
$("#Id").autocomplete({
source: url,
change : function (event,ui){
alert('changed');
}
});
I would like that the change event will fire any time the user type anything in the input text
It's not the case here.
when I type something it does not fire until I'm pressing with the mouse on somewhere else on the screen.
How to handle this scenario?
Try to bind a keypress event to it directly?
$("#Id").autocomplete({
source: url,
change : function (event,ui){
alert('changed');
}
});
$("#Id").bind('keypress',function(){$(this).autocomplete.change});
I solve my problem by using the keypress event separately. instead of using the change event.
The new code:
$("#Id").autocomplete({
source: url
});
$("#Id").keydown(function() {
// Logic goes here
});
This problem occurred because we got out of focus two events were fired the onBlur and the onclick event of some button I have. and this cause inconsistently behavior.
Thanks
I'm trying to migrate from using inline event triggers to using event listeners using Prototype's Event.observe function. There are a few inline commands that I don't know how to handle using the function call.
I want to move from:
<form id='formFoo' action='whatever.php' onsubmit="return Foo.verify(this);">
To an event call:
Event.observe('formFoo', 'submit', Foo.verify);
This of course will not work, as I need a return value from the function I call to determine whether the form gets submitted or not.
How do I do this using event handlers?
The easiest way to do this is probably Event.Stop from prototype. This works for me (put this in any script block):
Foo = { verify: function(){ return false } };
Event.observe(window, 'load', function() {
Event.observe('formFoo', 'submit', function(e){
if(! Foo.verify($('formFoo'))){
e.stop();
}
});
});
It stops every form submission; you will just have to change Foo.verify to do what you wanted.
Explanation: When the submit event is triggered, prototype passes the handler a prototype Event object representing the event, and the stop method on that object prevents the submit. The rest is just setting up the event.
Minor note: Among other things, passing Foo.verify directly as a handler will cause verify to be called as a function, not a method (this will be the global object within the call, rather than Foo). That situation might be okay - if verify doesn't use this, you're fine. Be aware of the difference, though.