I have a click function which is given below
$('.page-nav li').click(function(event){
console.log("clickedTab-page-nav-first-before set ="+Session.get('clickedTab'));
Session.set('clickedTab',event.target.id);
//var sel = event.prevUntil("[class*=active]").andSelf();
var sel = $(this).prevUntil("[class*=active]").andSelf(); //find all previous li
//of li which have
//class=active
sel = sel.add(sel.eq(0).prev()); // include the that li also(Now all li elements).
sel.removeClass('active'); //Remove the active.
//sel = event.nextUntil("[class*=active]").andSelf(); //Also for top to bottom
//(Viceversa)
sel = $(this).nextUntil("[class*=active]").andSelf();
sel = sel.add(sel.eq(-1).next());
sel.removeClass('active');
//event.addClass('active');
$(this).addClass('active'); //Now add class active for the clicked li
var rightcontent="";
console.log("clickedTab-page-nav-second-after set = "+Session.get('clickedTab'));
switch($(this).attr('id')){
case 'rfq':
.......
.....
}
});
Then next is I want to call this click function from another place
$(document).ready(function() {
console.log("clickedTab-page load = "+Session.get('clickedTab'));
if(Session.get('clickedTab')!=null||Session.get('clickedTab')!= undefined){
alert("Got It");
//$('.page-nav li').click(event);
$('.page-nav li').click(); //this is not working
}
});
Now the problem is page click function in if condition is not working. However I got the alert. Any help is highly appreciated. Thanks in advance...
you are not really using the event parameter in your function and you state you wish to call it outside of an event chain so you could change it to be a regular function
var setupClicktab = function(id){
console.log("clickedTab-page-nav-first-before set ="+Session.get('clickedTab'));
Session.set('clickedTab',id);
...
}
the you'd use it like:
$('.page-nav li').click(function(event){return setupClicktab(event.target.id);});
and in document ready
setupClicktab.Call($('.page-nav li'),Session.get('clickedTab'));
The latter call class it in the context of the selection (that is this inside the function will refer to the selection(1). It also passes the value stored in the session variable in as the id.
a side note. Your test
if(Session.get('clickedTab')!=null||Session.get('clickedTab')!= undefined)
could simply be
if(Session.get('clickedTab'))
Unless you might store either an empty string, zero or the boolean value false in that variable. But seeing how it's used that's unlikely since they are all invalid values for the id attribute
(1)This is slightly different than in the click event where it refers to the DOM element)
You need to put $('.page-nav li').click(function(event){ inside document.ready and before your $('.page-nav li').click();. Because if you call .click when the DOM is not ready, there are chances that there is no event handler attached
If you don't put $('.page-nav li').click(function(event){ inside document.ready OR you're dealing with dynamically created elements. You need delegated event $(document).on("click",".page-nav li",function(event){
From $.on
Related
I want to check if an element has the class .active, if it does add: margin-top: 4px;
However I only want this to occur once, when the page loads, once the class has been detected I don't want to detect it again and add the CSS style.
This class is applied when certain elements are hovered over.
Is this possible in jQuery?
Check out the one event. Documented example:
$('#foo').one('click', function() {
alert('This will be displayed only once.');
});
This will fire once on page load
$(function(){
if ($("#elementid").hasClass("active"))
{
$("#elementid").css("margin-top", "4px");
}
});
The way I usually do this is:
(function($) {
// my custom function to process elements
function myProcessFunction(context) {
// get context
context = context || document;
// select elements within the context, filter out already processed ones
// loop through remained (unprocessed) elements
// '.my-class' - selector for the elements I want to process
$('.my-class:not(.my-class-processed)', context).each( function(i.e){
// mark the element as processed
$(e).addClass('my-class-processed');
// add process code here
});
}
// run myProcessFunction on document.ready
$(document).ready( function(){
myProcessFunction();
});
})(jQuery);
This way I have:
reusable function
processed elements are marked and won't be processed next time the function is called
elements are processed within the context only, if specified (for instance, HTML code returned via an AJAX request)
Hope this helps )
I am trying to target a class called 'horizontal-video' in a div within an AEM component and if the author has clicked a checkbox that has an ID of 'coral-id-540' I want to add a second class called 'flipped' to the div. Here is the code I wrote that isn't working. Could someone help me figure out why it's not working? The console does not show errors.
var x = document.getElementsByClassName("horizontal-video");
$('#coral-id-540').change(function(){
if($(this).is(":checked")) {
$(this).addClass("flipped");
} else {
$(this).removeClass("flipped");
}
});
It's quite possible you're not waiting for the DOM to completely load, (or at least have this bit of code below the element in question on the page during page load)
Is your code wrapped in $(document).ready(function(){ //your code });?
Also, be aware that any element that is dynamically added to the page by JavaScript/jQuery after page load will not have a listener attached using the method you're using.
To allow dynamically added elements to be included in your listener, you should target an ancestor node and add the listener to that node. In plain English: attach the listener to a "higher up" element. The safest (although slowest) node being document itself, but it's better to target something closer:
$(document).ready(function () {
var $horizontalVideo = $(".horizontal-video"); //You're using jQuery - why not use it here? Also, I always name jQuery objects with a `$` in front as a shorthand to know it's wrapped in a jQuery object. Plus, a more descriptive name will help you immensely.
//replace parent-of-coral with the ID of a parent element that you know exists on DOM ready:
$("#parent-of-coral").on("change", "#coral-id-540", function (e) { //get used to using "e" as the event variable for preventing default / stopping propagation / etc
$this = $(this); //cache $(this) reference rather than creating another jQuery object each time you use it
if ($this.is(":checked")) {
$this.addClass("flipped");
} else {
$this.removeClass("flipped");
}
});
});
I am using jQuery and semantic UI for a project, and I got stuck with what the second this is referring to. what would the second this be referring to? I am new with jQuery by the way. I want the second this to refer to #sideBar a but every time I try to add classes it doesn't work,
I want to remove all classes, then add item to all of them, then get the text content of the anchor tag and set that anchor tag's attribute with a class with the textContent as it's name.
$('#sideBar a').on('click', function(){
$('#sideBar a').removeClass().addClass("item");
var addC = ($(this).text());
$(this).addClass(addC);
});
Could anyone tell me how to do this, I have some knowledge of apply call and bind in javascript by the way
this inside and event listener with a non-arrow function will be your event target:
$('#sideBar a').on('click', function (event) {
// next line removes all classes from all anchor elements that are children of #sideBar then adds the class item to each of them
$('#sideBar a').removeClass().addClass("item");
// sets addC to whatever the event target's text is
var addC = ($(this).text());
// adds the text stored in addC as a class to the event target
$(this).addClass(addC);
console.log(this === event.target); // logs true
});
edit: I just realized I didn't answer your question:
$(this).parents('#sideBar').first().addClass(addC); instead of $(this).addClass(addC); should do the trick.
I want to obtain the exact details for the item on a web page that has been clicked on, using jquery.
That item can be a form item (like a checkbox, text box, text area etc) or section of text (in a paragraph or div or other) or list or image ...
What I figured out is the following--
$(function(){
$('*')
.bind('click', function(event) {
//now obtain details of item that has been clicked on...
});
});
Now, I want the exact details- viz the div id/form id/paragraph #, ie all details for that particular item. How do i get this data? I understand that this data is available in the DOM but I just dont know how to get it in this particular case...
Probably the best way to do to use the target property of the event. By default, this returns a non-jQuery object, which isn't particularly useful, however wrapping it in $() solves this issue:
$(function() {
$(document).bind('click', function(event) {
var element = $(event.target);
alert(element.height()); // Get height
alert(element.attr('id')); // Get ID attribute
// ...
});
});
If you want to fix your current method, inside your click() handler, you can access the properties of that element using .attr(), and friends:
$(function() {
$('*').bind('click', function(event) {
alert($(this).height()); // Get height
alert($(this).attr('id')); // Get ID attribute
// ...
});
});
$(this) in the scope of the function references the element that was clicked. There is a list of functions that will return attributes here and here in the jQuery docs. $.attr('id') will return the element's ID, among other things, and $.data() will return data-* attributes.
To get attributes of parent elements, simply use $(this).parent(). For example, to get the ID of the form that contains the clicked element, use $(this).closest('form').attr('id');. Everything is relative to the clicked element ($(this)), so you can just use the DOM traversal functions.
However, using $('*').bind() is incredibly inefficient; you're binding an event handler to every element on the page, when really you should delegate events with .on() (jQuery 1.7+):
$(function() {
$('body').on('click', '*', function(event) {
alert($(this).height()); // Get height
alert($(this).attr('id')); // Get ID attribute
// ...
});
});
This approach only binds one event to <body> instead of an event to every element on the page.
Use the target of click event on page
$(document).click(function(event){
/* store native dom node*/
var tgt=event.target;
/* store jQuery object of dom node*/
var $tgt=$(tgt);
/* example element details*/
var details={ id : tgt.id, height: $tgt.height(), tag : tgt.tagName}
console.log( details)
})
Look at the event.target, and then you can use jQuery's .parents() method to look at every ancestor:
$(document).on('click', function(event) {
var $t = $(event.target); // the element that was actually clicked
var $p = $t.parents(); // the target's parents
var $form = $p.filter('form').first(); // the enclosing form, if it exists
});
Why is this "copy"(click) wrong, it binds all the previous handlers as well:
var add = function(element) {
var ele = element.clone(true);
$('.container').append(ele);
$('.copy', new).click(function(){ add(ele); });
}
Idea: I want to have an element text next to a "copy" button.
When I click "copy", it clones the current row and append it to the container.
But this seems to be recursive...
The true parameter says:
Normally, any event handlers bound to the original element are not copied to the clone. The optional withDataAndEvents parameter allows us to change this behavior, and to instead make copies of all of the event handlers as well, bound to the new copy of the element.
So you keep adding click event handlers to the .clone element. Depending on your actual case, just don't bind the event handler again:
var add = function(element) {
var cloned = element.clone(true);
$('.container').append(cloned);
}
$('.container .copy').click(function(){
add($(this).closest('tr'));
});
(I used $(this).closest('tr') to get the parent row. Obviously you have to adjust it to your needs.)
Update:
Or don't pass true:
var add = function(element) {
var cloned = element.clone();
$('.container').append(cloned);
$('.copy', cloned).click(function(){ add(cloned); });
}
new is JS keyword. Change it to something else and it should work.
( Your code does not have call of add() except of from itself. So it is not clear how code gets there initially. And recursive declaration of functions as in your code is a path to programmers hell )