Develop Reference

Polymer bounded property not updating (sometimes)

This problem is with 1.0
I have the following html in a polymer element
<iron-selector attr-for-selected="step-number" selected="{{stepNumber}}">
<section step-number="1">
<page-1 id="page1"></page-1>
</section>
<section step-number="2">
<page-2 id="page2"></page-2>
</section>
<section step-number="3">
<page-3 id="page3"></page-3>
</section>`
page 1 fires an event - event1, page-2 fires event2. Here's my javascript for the polymer element
function () {
Polymer({
is: 'name',
ready: function() {
this.stepNumber = 1;
var firstStep = this.$.page1;
var secondStep = this.$.page2;
var thirdStep = this.$.page3;
var that = this;
firstStep.addEventListener('event1', function(e) {
that.stepNumber = 2; // WORKING
});
secondStep.addEventListener('event2', function(e) {
that.stepNumber = 3; // NOT WORKING
});
}
});
Here's the interesting part:
Both events get fired, the value for stepNumber gets updated inside event1 handler but not inside event2 handler. I also debugged this and inside the event2 handler the value of stepNumber DOES get updated (page-3 element gets the tag "iron-selected") but it doesn't persist. After a bunch of polymer code executes the value is back to 2.
Looks like a bug in polymer?
Some info from the debugger -
polymer code that's executing after the event method is basically the code that executes the event handler, followed by a "gesture recognition" code (which i guess is the on-click), where the tag iron-selector is added to page-2 section
var recognizers = Gestures.recognizers;
for (var i = 0, r; i < recognizers.length; i++)
{
r = recognizers[i];
if (gs[r.name] && !handled[r.name]) {
handled[r.name] = true; // in here for r.name = "tap"
r[type](ev); // type = click. ev = MouseEvent. ev.target = iron-selector
}
}
Digging deeper -
this creates an event handler
_createEventHandler: function(node, eventName, methodName) {
var host = this;
return function(e) {
if (host[methodName]) {
hostmethodName;
} else {
host._warn(host._logf("_createEventHandler", "listener method " + methodName + " not defined"));
}
};
host is iron-selector. methodName is _activateHandler where _itemActivate is called for section of page-2
_activateHandler: function(e) {
// TODO: remove this when https://github.com/Polymer/polymer/issues/1639 is fixed so we
// can just remove the old event listener.
if (e.type !== this.activateEvent) {
return;
}
var t = e.target;
var items = this.items;
while (t && t != this) {
var i = items.indexOf(t);
if (i >= 0) {
var value = this._indexToValue(i);
this._itemActivate(value, t);
return;
}
t = t.parentNode;
}
},
_itemActivate: function(value, item) {
if (!this.fire('iron-activate',
{selected: value, item: item}, {cancelable: true}).defaultPrevented) {
this.select(value);
}
_itemActivate is where the value of stepNumber changes to 2

Clear the activateEvent property (activate-event attribute) of the iron-selector, like this:
<iron-selector attr-for-selected="step-number" selected="{{stepNumber}}" activate-event="">

Try this:
Polymer({
is: 'name',
ready: function() {
this.stepNumber = 1;
var firstStep = this.$.page1;
var secondStep = this.$.page2;
var thirdStep = this.$.page3;
var that = this;
firstStep.addEventListener('event1', function(e) {
that.async(function(){
that.stepNumber = 2;
},0);
});
secondStep.addEventListener('event2', function(e) {
that.async(function(){
that.stepNumber = 3;
},0);
});
}
});

Why function(document) doesn't work in separate file?

I have an HTML file and this contain JavaScript code and works fine, but when I decided put the JS code in different file and call from the HTML file, doesn't work. Why?
The JS code is like this:
(function (document) {
var toggleDocumentationMenu = function () {
var navBtn = document.querySelector('.main-nav1');
var navList = document.querySelector('.main-nav2');
var navIsOpenedClass = 'nav-is-opened';
var navListIsOpened = false;
navBtn.addEventListener('click', function (event) {
event.preventDefault();
if (!navListIsOpened) {
addClass(navList, navIsOpenedClass);
navListIsOpened = true;
} else {
removeClass(navList, navIsOpenedClass);
navListIsOpened = false;
}
});
};
var toggleMainNav = function () {
var documentationItem = document.querySelector('.main-nav3');
var documentationLink = document.querySelector('.main-nav3 > .main-sub-nav');
var documentationIsOpenedClass = 'subnav-is-opened';
var documentationIsOpened = false;
if (documentationLink) {
documentationLink.addEventListener('click', function (event) {
event.preventDefault();
if (!documentationIsOpened) {
documentationIsOpened = true;
addClass(documentationItem, documentationIsOpenedClass);
} else {
documentationIsOpened = false;
removeClass(documentationItem, documentationIsOpenedClass);
}
});
}
};
var isTouch = function () {
return ('ontouchstart' in window) ||
window.DocumentTouch && document instanceof DocumentTouch;
};
var addClass = function (element, className) {
if (!element) {
return;
}
element.className = element.className.replace(/\s+$/gi, '') + ' ' + className;
};
var removeClass = function (element, className) {
if (!element) {
return;
}
element.className = element.className.replace(className, '');
};
toggleDocumentationMenu();
toggleMainNav();
})(document);
I read it's possible that works if I put like this:
$(document).ready(function() {
// the javascript code here
});
But it still doesn't working.
Now I wonder, It's possible this code works fine in separate file?

Why can I not select an element loaded with $.get in JQuery [duplicate]

This question already has answers here:
How do I return the response from an asynchronous call?
(41 answers)
Closed 8 years ago.
I have a series of buttons loaded from a JSON, which in turn should disappear and append other buttons on click.
Like so (the first level of buttons is already on the page and reacting properly to other events like hover):
...
$(document).on('click', "#subcategoryButtons button", function () {
getTemplate('imgMenu.html');
var entryIndex = this.id[0];
var subentryIndex;
if (this.id[1] === '0')
{
subentryIndex = this.id.slice(-1);
}
else
{
subentryIndex = this.id.slice(-2);
}
var imgs = data.category[entryIndex].subcategory[subentryIndex].imgs;
$.each(imgs, function (imgIndex)
{
var imgName = data.category[entryIndex].subcategory[subentryIndex].imgs[imgIndex].imgName;
var imgId = data.category[entryIndex].subcategory[subentryIndex].imgs[imgIndex].imgId;
$('#imgButtons span').append('<button id="' + imgId + '">' + imgName + '</button>');
});
});
}
;
...
This is the content of the template being loaded:
<div id="imgSpace">
<aside id="overlayRight">
Right Overlay space
</aside>
<div id="overlayBottom">
Bottom Overlay
</div>
</div>
<nav id="imgButtons" class="resizable">
<span></span>
</nav>
Here's the getTemplate code:
function getTemplate(templateUrl)
{
$.get('templates/' + templateUrl, function (content)
{
if (templateUrl === 'leftMenu.html')
{
$('#leftMenu').html(content);
}
else
{
$('#main').html(content);
}
});
}
Even though it should append the buttons to the #imgButtons span, it seems as if it cannot select any of the elements in the template just loaded. If I try to append the buttons to another part of the page (say like the left menu, which is not recently loaded) or instead of getting a template I simply clear out the HTML in the main, the attachment works. So it appears that the issue is how to select elements that have been loaded. Any help would be greatly appreciated.
Thanks to everyone who pointed me in the right direction. In the end I didn't use Ajax but deferred.done like so:
$(document).on('click', "#subcategoryButtons button", function () {
var entryIndex = this.id[0];
var subentryIndex;
if (this.id[1] === '0') {
subentryIndex = this.id.slice(-1);
} else {
subentryIndex = this.id.slice(-2);
}
var imgs = data.category[entryIndex].subcategory[subentryIndex].imgs;
$('main').html('');
$.get("templates/imgMenu.html", function (content)
{
$('#main').html(content);
}).done(function () {
$.each(imgs, function (imgIndex) {
var imgName = data.category[entryIndex].subcategory[subentryIndex].imgs[imgIndex].imgName;
var imgId = data.category[entryIndex].subcategory[subentryIndex].imgs[imgIndex].imgId;
console.log(entryIndex);
$('#imgButtons span').append('<button id="' + imgId + '">' + imgName + '</button>');
});
});
});
}
;

You're using the wrong selector #imgButtons button should be #imgButtons span to select the span in #imgButtons
Also your template is loaded asynchronously so you'll have to wait until it is loaded (via a callback function) to manipulate it. something like
$(document).on('click', "#subcategoryButtons button", function () {
getTemplate('imgMenu.html', callback);
function callback(){
var entryIndex = this.id[0];
var subentryIndex;
if (this.id[1] === '0')
{
subentryIndex = this.id.slice(-1);
}
else
{
subentryIndex = this.id.slice(-2);
}
var imgs = data.category[entryIndex].subcategory[subentryIndex].imgs;
$.each(imgs, function (imgIndex)
{
var imgName = data.category[entryIndex].subcategory[subentryIndex].imgs[imgIndex].imgName;
var imgId = data.category[entryIndex].subcategory[subentryIndex].imgs[imgIndex].imgId;
$('#imgButtons span').append('<button id="' + imgId + '">' + imgName + '</button>');
});
}
});
...
function getTemplate(templateUrl, callback)
{
$.get('templates/' + templateUrl, function (content)
{
if (templateUrl === 'leftMenu.html')
{
$('#leftMenu').html(content);
}
else
{
$('#main').html(content);
}
callback();
});
}

let's make a bit modification on your code, use promises - the jqxhr object returned by the ajax method implements the promise interface, therefore you could make use of it.
function getTemplate(templateUrl)
{
return $.get('templates/' + templateUrl, function (content)
{
if (templateUrl === 'leftMenu.html')
{
$('#leftMenu').html(content);
}
else
{
$('#main').html(content);
}
});
}
use it in this way
$(document).on('click', "#subcategoryButtons button", function (e) {
getTemplate('imgMenu.html').then(function () {
var entryIndex = this.id[0];
var subentryIndex;
if (this.id[1] === '0') {
subentryIndex = this.id.slice(-1);
} else {
subentryIndex = this.id.slice(-2);
}
var imgs = data.category[entryIndex].subcategory[subentryIndex].imgs;
$.each(imgs, function (imgIndex) {
var imgName = data.category[entryIndex].subcategory[subentryIndex].imgs[imgIndex].imgName;
var imgId = data.category[entryIndex].subcategory[subentryIndex].imgs[imgIndex].imgId;
$('#imgButtons span').append('<button id="' + imgId + '">' + imgName + '</button>');
});
});
});

Adding click listeners onto code generated in a Javascript object

I am creating a Javascript/jQuery slider class which builds a slideshow on a page when invoked.
Here is my Cycler object code:
//Cycle
var Cycler = function(options) {
this.cycleElement = options.cycleElement;
this.speed = options.speed || 5000;
this.effect = options.effect || "linear";
this.currentItem = null;
this.children = this.addItemsToCycler();
this.buttons = null;
if(options.buttonsEl.length != "") {
this.buttons = this.generateButtons();
}
}
Cycler.prototype.addItemsToCycler = function() {
var children = [];
jQuery(this.cycleElement + " > div.cycle-object").each(function(item, value) {
children.push(value);
});
return children;
}
Cycler.prototype.generateButtons = function() {
var buttons = "<ul>";
var counter = 0;
this.children.forEach(function(item) {
buttons += "<li><a href='#' data-rel='" + counter + "'></a></li>";
counter++;
});
buttons += "</ul>";
jQuery("#cycle-buttons").html(buttons);
}
Cycler.prototype.showItem = function() {
jQuery(this.children).fadeOut("slow");
jQuery(this.children[this.currentItem]).fadeIn("slow");
}
Cycler.prototype.start = function() {
if(this.currentItem == null || this.children.length <= this.currentItem) {
this.currentItem = 0;
}
this.showItem();
var self = this;
interval = window.setInterval(function() {
self.next();
}, this.speed);
}
Cycler.prototype.next = function() {
if(this.currentItem >= (this.children.length - 1)) {
this.currentItem = 0;
} else {
this.currentItem++;
}
this.showItem();
}
Cycler.prototype.prev = function() {
if(this.currentItem <= 0) {
this.currentItem = this.children.length - 1;
} else {
this.currentItem--;
}
this.showItem();
}
Cycler.prototype.pause = function() {
if(this.interval == null) {
console.log("Cycler is already paused");
} else {
window.clearInterval(this.interval);
this.interval = null;
}
}
Cycler.prototype.gotoItem = function(gotoItem) {
this.currentItem = gotoItem;
this.showItem();
}
The markup:
<div id="cycle-wrap">
<div id="background-cycle">
<div data-rel="0" class="cycle-object"></div>
<div data-rel="1" class="cycle-object"></div>
<div data-rel="2" class="cycle-object"></div>
</div>
<div class="inner">
<div id="cycle-buttons">
</div>
</div>
</div>
And my client code which creates an instance of the class:
//Cycler
var cycler = new Cycler({
cycleElement : "#background-cycle",
speed : 5000,
effect : "linear",
buttonsEl : "#cycle-buttons"
});
cycler.start();
Now, if a user supplies an element in the 'buttonsEl' variable which is passed to the class, I want the class to generate a list of li elements which when clicked will take the user to that slide. I have done this via the 'generateButtons' function I have already created the prototype function for this called 'goToItem' as you can see above. I am linking the li elements and the corresponding html using a 'data'rel' attribute.
What I would like to do is add click listeners onto each list element (that is generated in the 'generateButtons' function) which will pass the data-rel attribute through to my 'goToItem' function. Does anyone know of the best way this would be incorporated into my code, keeping it nice and OOP.
Thanks

In your Cycler constructor we could pass the buttonsEl to the generateButtons. Then this method will be able to insert the buttons in the desired element.
// Not sure if you want this comparison. If works by coercion but it's tricky. And it
// will fail if your client doesn't pass a buttonsEl option.
// I would prefer something like this:
// if(options.buttonsEl && options.buttonsEl.length > 0) {
if(options.buttonsEl.length != "") {
this.buttons = this.generateButtons(options.buttonsEl);
}
The generateButtons could be something like this:
Cycler.prototype.generateButtons = function(buttonsEl) {
var $buttons = jQuery("<ul></ul>");
this.children.forEach(function(item, counter) {
$buttons.append("<li><a href='#' data-rel='" + counter + "'></a></li>");
});
// Capture cycler this to be able to invoke the gotoItem method
// within the event handler
var that = this;
$buttons.on('click', 'li', function () {
that.gotoItem($(this).find('a').data('rel'));
});
jQuery(buttonsEl).html($buttons);
return $buttons;
}

How to avoid getting same functionality by jquery in same multiple elements?

I've very little knowledge at jQuery. I'm working at a webpage. There are different kinds of select option element at that page. Among one of them, I've to use a jQuery Dropdown checkbox. This one, I've used.
I can implement this at my webpage successfully. But, problem is it affects all my Select option element!! I've different class name for different select element. like
<select name="company" class="company">
<option> Company Name </option>
<option> Company Name </option>
<option> Company Name </option>
<option> Company Name </option>
<option> Company Name </option>
</select>
<select name="institute" class="institute">
<option> Company Name </option>
<option> Company Name </option>
<option> Company Name </option>
<option> Company Name </option>
<option> Company Name </option>
</select>
<select name="group" class="dropdownCheckbox">
<option> Company Name </option>
<option> Company Name </option>
<option> Company Name </option>
<option> Company Name </option>
<option> Company Name </option>
</select>
I've used the jquery at last one(class="dropdownCheckbox"). But, it affected all the select element. I can't understand how I edit the jquery defining only for class="dropdownCheckbox".
This is the javascript code for HTML file:
<script type="text/javascript">
$(function(){
$("select").multiselect();
});
</script>
And the main javasript file for the effect(jquery.multiselect.js):
(function($, undefined) {
var multiselectID = 0;
var $doc = $(document);
$.widget("ech.multiselect.dropdownCheckbox", {
// default options
options: {
header: true,
height: 175,
minWidth: 310,
classes: 'dropdownCheckbox',
checkAllText: 'Check all',
uncheckAllText: 'Uncheck all',
noneSelectedText: 'Select Group',
selectedText: 'Select Group',
selectedList: 0,
show: null,
hide: null,
autoOpen: false,
multiple: true,
position: {},
appendTo: "body"
},
_create: function() {
var el = this.element.hide();
var o = this.options;
this.speed = $.fx.speeds._default; // default speed for effects
this._isOpen = false; // assume no
// create a unique namespace for events that the widget
// factory cannot unbind automatically. Use eventNamespace if on
// jQuery UI 1.9+, and otherwise fallback to a custom string.
this._namespaceID = this.eventNamespace || ('multiselect' + multiselectID);
var button = (this.button = $('<button type="button"><span class="ui-icon ui-icon-triangle-1-s"></span></button>'))
.addClass('ui-multiselect ui-widget ui-state-default ui-corner-all')
.addClass(o.classes)
.attr({ 'title':el.attr('title'), 'aria-haspopup':true, 'tabIndex':el.attr('tabIndex') })
.insertAfter(el),
buttonlabel = (this.buttonlabel = $('<span />'))
.html(o.noneSelectedText)
.appendTo(button),
menu = (this.menu = $('<div />'))
.addClass('ui-multiselect-menu ui-widget ui-widget-content ui-corner-all')
.addClass(o.classes)
.appendTo($(o.appendTo)),
header = (this.header = $('<div />'))
.addClass('ui-widget-header ui-corner-all ui-multiselect-header ui-helper-clearfix')
.appendTo(menu),
headerLinkContainer = (this.headerLinkContainer = $('<ul />'))
.addClass('ui-helper-reset')
.html(function() {
if(o.header === true) {
return '<li><a class="ui-multiselect-all" href="#"><span class="ui-icon ui-icon-check"></span><span>' + o.checkAllText + '</span></a></li><li><a class="ui-multiselect-none" href="#"><span class="ui-icon ui-icon-closethick"></span><span>' + o.uncheckAllText + '</span></a></li>';
} else if(typeof o.header === "string") {
return '<li>' + o.header + '</li>';
} else {
return '';
}
})
.append('<li class="ui-multiselect-close"><span class="ui-icon ui-icon-circle-close"></span></li>')
.appendTo(header),
checkboxContainer = (this.checkboxContainer = $('<ul />'))
.addClass('ui-multiselect-checkboxes ui-helper-reset')
.appendTo(menu);
// perform event bindings
this._bindEvents();
// build menu
this.refresh(true);
// some addl. logic for single selects
if(!o.multiple) {
menu.addClass('ui-multiselect-single');
}
// bump unique ID
multiselectID++;
},
_init: function() {
if(this.options.header === false) {
this.header.hide();
}
if(!this.options.multiple) {
this.headerLinkContainer.find('.ui-multiselect-all, .ui-multiselect-none').hide();
}
if(this.options.autoOpen) {
this.open();
}
if(this.element.is(':disabled')) {
this.disable();
}
},
refresh: function(init) {
var el = this.element;
var o = this.options;
var menu = this.menu;
var checkboxContainer = this.checkboxContainer;
var optgroups = [];
var html = "";
var id = el.attr('id') || multiselectID++; // unique ID for the label & option tags
// build items
el.find('option').each(function(i) {
var $this = $(this);
var parent = this.parentNode;
var description = this.innerHTML;
var title = this.title;
var value = this.value;
var inputID = 'ui-multiselect-' + (this.id || id + '-option-' + i);
var isDisabled = this.disabled;
var isSelected = this.selected;
var labelClasses = [ 'ui-corner-all' ];
var liClasses = (isDisabled ? 'ui-multiselect-disabled ' : ' ') + this.className;
var optLabel;
// is this an optgroup?
if(parent.tagName === 'OPTGROUP') {
optLabel = parent.getAttribute('label');
// has this optgroup been added already?
if($.inArray(optLabel, optgroups) === -1) {
html += '<li class="ui-multiselect-optgroup-label ' + parent.className + '">' + optLabel + '</li>';
optgroups.push(optLabel);
}
}
if(isDisabled) {
labelClasses.push('ui-state-disabled');
}
// browsers automatically select the first option
// by default with single selects
if(isSelected && !o.multiple) {
labelClasses.push('ui-state-active');
}
html += '<li class="' + liClasses + '">';
// create the label
html += '<label for="' + inputID + '" title="' + title + '" class="' + labelClasses.join(' ') + '">';
html += '<input id="' + inputID + '" name="multiselect_' + id + '" type="' + (o.multiple ? "checkbox" : "radio") + '" value="' + value + '" title="' + title + '"';
// pre-selected?
if(isSelected) {
html += ' checked="checked"';
html += ' aria-selected="true"';
}
// disabled?
if(isDisabled) {
html += ' disabled="disabled"';
html += ' aria-disabled="true"';
}
// add the title and close everything off
html += ' /><span>' + description + '</span></label></li>';
});
// insert into the DOM
checkboxContainer.html(html);
// cache some moar useful elements
this.labels = menu.find('label');
this.inputs = this.labels.children('input');
// set widths
this._setButtonWidth();
this._setMenuWidth();
// remember default value
this.button[0].defaultValue = this.update();
// broadcast refresh event; useful for widgets
if(!init) {
this._trigger('refresh');
}
},
// updates the button text. call refresh() to rebuild
update: function() {
var o = this.options;
var $inputs = this.inputs;
var $checked = $inputs.filter(':checked');
var numChecked = $checked.length;
var value;
if(numChecked === 0) {
value = o.noneSelectedText;
} else {
if($.isFunction(o.selectedText)) {
value = o.selectedText.call(this, numChecked, $inputs.length, $checked.get());
} else if(/\d/.test(o.selectedList) && o.selectedList > 0 && numChecked <= o.selectedList) {
value = $checked.map(function() { return $(this).next().html(); }).get().join(', ');
} else {
value = o.selectedText.replace('#', numChecked).replace('#', $inputs.length);
}
}
this._setButtonValue(value);
return value;
},
// this exists as a separate method so that the developer
// can easily override it.
_setButtonValue: function(value) {
this.buttonlabel.text(value);
},
// binds events
_bindEvents: function() {
var self = this;
var button = this.button;
function clickHandler() {
self[ self._isOpen ? 'close' : 'open' ]();
return false;
}
// webkit doesn't like it when you click on the span :(
button
.find('span')
.bind('click.multiselect', clickHandler);
// button events
button.bind({
click: clickHandler,
keypress: function(e) {
switch(e.which) {
case 27: // esc
case 38: // up
case 37: // left
self.close();
break;
case 39: // right
case 40: // down
self.open();
break;
}
},
mouseenter: function() {
if(!button.hasClass('ui-state-disabled')) {
$(this).addClass('ui-state-hover');
}
},
mouseleave: function() {
$(this).removeClass('ui-state-hover');
},
focus: function() {
if(!button.hasClass('ui-state-disabled')) {
$(this).addClass('ui-state-focus');
}
},
blur: function() {
$(this).removeClass('ui-state-focus');
}
});
// header links
this.header.delegate('a', 'click.multiselect', function(e) {
// close link
if($(this).hasClass('ui-multiselect-close')) {
self.close();
// check all / uncheck all
} else {
self[$(this).hasClass('ui-multiselect-all') ? 'checkAll' : 'uncheckAll']();
}
e.preventDefault();
});
// optgroup label toggle support
this.menu.delegate('li.ui-multiselect-optgroup-label a', 'click.multiselect', function(e) {
e.preventDefault();
var $this = $(this);
var $inputs = $this.parent().nextUntil('li.ui-multiselect-optgroup-label').find('input:visible:not(:disabled)');
var nodes = $inputs.get();
var label = $this.parent().text();
// trigger event and bail if the return is false
if(self._trigger('beforeoptgrouptoggle', e, { inputs:nodes, label:label }) === false) {
return;
}
// toggle inputs
self._toggleChecked(
$inputs.filter(':checked').length !== $inputs.length,
$inputs
);
self._trigger('optgrouptoggle', e, {
inputs: nodes,
label: label,
checked: nodes[0].checked
});
})
.delegate('label', 'mouseenter.multiselect', function() {
if(!$(this).hasClass('ui-state-disabled')) {
self.labels.removeClass('ui-state-hover');
$(this).addClass('ui-state-hover').find('input').focus();
}
})
.delegate('label', 'keydown.multiselect', function(e) {
e.preventDefault();
switch(e.which) {
case 9: // tab
case 27: // esc
self.close();
break;
case 38: // up
case 40: // down
case 37: // left
case 39: // right
self._traverse(e.which, this);
break;
case 13: // enter
$(this).find('input')[0].click();
break;
}
})
.delegate('input[type="checkbox"], input[type="radio"]', 'click.multiselect', function(e) {
var $this = $(this);
var val = this.value;
var checked = this.checked;
var tags = self.element.find('option');
// bail if this input is disabled or the event is cancelled
if(this.disabled || self._trigger('click', e, { value: val, text: this.title, checked: checked }) === false) {
e.preventDefault();
return;
}
// make sure the input has focus. otherwise, the esc key
// won't close the menu after clicking an item.
$this.focus();
// toggle aria state
$this.attr('aria-selected', checked);
// change state on the original option tags
tags.each(function() {
if(this.value === val) {
this.selected = checked;
} else if(!self.options.multiple) {
this.selected = false;
}
});
// some additional single select-specific logic
if(!self.options.multiple) {
self.labels.removeClass('ui-state-active');
$this.closest('label').toggleClass('ui-state-active', checked);
// close menu
self.close();
}
// fire change on the select box
self.element.trigger("change");
// setTimeout is to fix multiselect issue #14 and #47. caused by jQuery issue #3827
// http://bugs.jquery.com/ticket/3827
setTimeout($.proxy(self.update, self), 10);
});
// close each widget when clicking on any other element/anywhere else on the page
$doc.bind('mousedown.' + this._namespaceID, function(event) {
var target = event.target;
if(self._isOpen
&& target !== self.button[0]
&& target !== self.menu[0]
&& !$.contains(self.menu[0], target)
&& !$.contains(self.button[0], target)
) {
self.close();
}
});
// deal with form resets. the problem here is that buttons aren't
// restored to their defaultValue prop on form reset, and the reset
// handler fires before the form is actually reset. delaying it a bit
// gives the form inputs time to clear.
$(this.element[0].form).bind('reset.multiselect', function() {
setTimeout($.proxy(self.refresh, self), 10);
});
},
// set button width
_setButtonWidth: function() {
var width = this.element.outerWidth();
var o = this.options;
if(/\d/.test(o.minWidth) && width < o.minWidth) {
width = o.minWidth;
}
// set widths
this.button.outerWidth(width);
},
// set menu width
_setMenuWidth: function() {
var m = this.menu;
m.outerWidth(this.button.outerWidth());
},
// move up or down within the menu
_traverse: function(which, start) {
var $start = $(start);
var moveToLast = which === 38 || which === 37;
// select the first li that isn't an optgroup label / disabled
var $next = $start.parent()[moveToLast ? 'prevAll' : 'nextAll']('li:not(.ui-multiselect-disabled, .ui-multiselect-optgroup-label)').first();
// if at the first/last element
if(!$next.length) {
var $container = this.menu.find('ul').last();
// move to the first/last
this.menu.find('label')[ moveToLast ? 'last' : 'first' ]().trigger('mouseover');
// set scroll position
$container.scrollTop(moveToLast ? $container.height() : 0);
} else {
$next.find('label').trigger('mouseover');
}
},
// This is an internal function to toggle the checked property and
// other related attributes of a checkbox.
//
// The context of this function should be a checkbox; do not proxy it.
_toggleState: function(prop, flag) {
return function() {
if(!this.disabled) {
this[ prop ] = flag;
}
if(flag) {
this.setAttribute('aria-selected', true);
} else {
this.removeAttribute('aria-selected');
}
};
},
_toggleChecked: function(flag, group) {
var $inputs = (group && group.length) ? group : this.inputs;
var self = this;
// toggle state on inputs
$inputs.each(this._toggleState('checked', flag));
// give the first input focus
$inputs.eq(0).focus();
// update button text
this.update();
// gather an array of the values that actually changed
var values = $inputs.map(function() {
return this.value;
}).get();
// toggle state on original option tags
this.element
.find('option')
.each(function() {
if(!this.disabled && $.inArray(this.value, values) > -1) {
self._toggleState('selected', flag).call(this);
}
});
// trigger the change event on the select
if($inputs.length) {
this.element.trigger("change");
}
},
_toggleDisabled: function(flag) {
this.button.attr({ 'disabled':flag, 'aria-disabled':flag })[ flag ? 'addClass' : 'removeClass' ]('ui-state-disabled');
var inputs = this.menu.find('input');
var key = "ech-multiselect-disabled";
if(flag) {
// remember which elements this widget disabled (not pre-disabled)
// elements, so that they can be restored if the widget is re-enabled.
inputs = inputs.filter(':enabled').data(key, true)
} else {
inputs = inputs.filter(function() {
return $.data(this, key) === true;
}).removeData(key);
}
inputs
.attr({ 'disabled':flag, 'arial-disabled':flag })
.parent()[ flag ? 'addClass' : 'removeClass' ]('ui-state-disabled');
this.element.attr({
'disabled':flag,
'aria-disabled':flag
});
},
// open the menu
open: function(e) {
var self = this;
var button = this.button;
var menu = this.menu;
var speed = this.speed;
var o = this.options;
var args = [];
// bail if the multiselectopen event returns false, this widget is disabled, or is already open
if(this._trigger('beforeopen') === false || button.hasClass('ui-state-disabled') || this._isOpen) {
return;
}
var $container = menu.find('ul').last();
var effect = o.show;
// figure out opening effects/speeds
if($.isArray(o.show)) {
effect = o.show[0];
speed = o.show[1] || self.speed;
}
// if there's an effect, assume jQuery UI is in use
// build the arguments to pass to show()
if(effect) {
args = [ effect, speed ];
}
// set the scroll of the checkbox container
$container.scrollTop(0).height(o.height);
// positon
this.position();
// show the menu, maybe with a speed/effect combo
$.fn.show.apply(menu, args);
// select the first not disabled option
// triggering both mouseover and mouseover because 1.4.2+ has a bug where triggering mouseover
// will actually trigger mouseenter. the mouseenter trigger is there for when it's eventually fixed
this.labels.filter(':not(.ui-state-disabled)').eq(0).trigger('mouseover').trigger('mouseenter').find('input').trigger('focus');
button.addClass('ui-state-active');
this._isOpen = true;
this._trigger('open');
},
// close the menu
close: function() {
if(this._trigger('beforeclose') === false) {
return;
}
var o = this.options;
var effect = o.hide;
var speed = this.speed;
var args = [];
// figure out opening effects/speeds
if($.isArray(o.hide)) {
effect = o.hide[0];
speed = o.hide[1] || this.speed;
}
if(effect) {
args = [ effect, speed ];
}
$.fn.hide.apply(this.menu, args);
this.button.removeClass('ui-state-active').trigger('blur').trigger('mouseleave');
this._isOpen = false;
this._trigger('close');
},
enable: function() {
this._toggleDisabled(false);
},
disable: function() {
this._toggleDisabled(true);
},
checkAll: function(e) {
this._toggleChecked(true);
this._trigger('checkAll');
},
uncheckAll: function() {
this._toggleChecked(false);
this._trigger('uncheckAll');
},
getChecked: function() {
return this.menu.find('input').filter(':checked');
},
destroy: function() {
// remove classes + data
$.Widget.prototype.destroy.call(this);
// unbind events
$doc.unbind(this._namespaceID);
this.button.remove();
this.menu.remove();
this.element.show();
return this;
},
isOpen: function() {
return this._isOpen;
},
widget: function() {
return this.menu;
},
getButton: function() {
return this.button;
},
position: function() {
var o = this.options;
// use the position utility if it exists and options are specifified
if($.ui.position && !$.isEmptyObject(o.position)) {
o.position.of = o.position.of || this.button;
this.menu
.show()
.position(o.position)
.hide();
// otherwise fallback to custom positioning
} else {
var pos = this.button.offset();
this.menu.css({
top: pos.top + this.button.outerHeight(),
left: pos.left
});
}
},
// react to option changes after initialization
_setOption: function(key, value) {
var menu = this.menu;
switch(key) {
case 'header':
menu.find('div.ui-multiselect-header')[value ? 'show' : 'hide']();
break;
case 'checkAllText':
menu.find('a.ui-multiselect-all span').eq(-1).text(value);
break;
case 'uncheckAllText':
menu.find('a.ui-multiselect-none span').eq(-1).text(value);
break;
case 'height':
menu.find('ul').last().height(parseInt(value, 10));
break;
case 'minWidth':
this.options[key] = parseInt(value, 10);
this._setButtonWidth();
this._setMenuWidth();
break;
case 'selectedText':
case 'selectedList':
case 'noneSelectedText':
this.options[key] = value; // these all needs to update immediately for the update() call
this.update();
break;
case 'classes':
menu.add(this.button).removeClass(this.options.classes).addClass(value);
break;
case 'multiple':
menu.toggleClass('ui-multiselect-single', !value);
this.options.multiple = value;
this.element[0].multiple = value;
this.refresh();
break;
case 'position':
this.position();
}
$.Widget.prototype._setOption.apply(this, arguments);
}
});
})(jQuery);
How can I make this jquery active only for class="dropdownCheckbox"?

you can use
$(".dropdownCheckbox").multiselect();

You can use the class selector
<script type="text/javascript">
$(function(){
$("select.company").multiselect();
// Targets the select with class="company"
});
</script>
jQuery uses the same selctors as CSS does :)