Javascript call function when html inject finished onclick - javascript

I've got this situation:
There is a calendar script to pick a date. When the date is picked a function called onclick to make a select box available for time pick. Now its not like its display:none-->display:block, the select being generated by JS. My goal is to customize this select. For that I got a jquery script "custom.select" which just turns the select to spans. The problem is that if I add the call for this script to the onclick right after the calendar call it does not take. I am pretty sure its because at that stage the html for the select is not injected yet. If I call the custom.select function from the firebug console after the select is visible - it works just fine.
So the question is: how do I call it so it will do its magic on select box?
Thanks

Use delegation with .on():
$(function(){
$(document).on('click','.classdynamic',function(){
//do stuff here
});
});
You should delegate event to the closest static container of your target element. This means changing $(document).on('click','.classdynamic',function(){...});
by something like: $('#staticContainer').on('click','.classdynamic',function(){...});

Figuring out when elements are added is not an easy task. I answered a similar question here.
The best way would be to have some control on the script that creates the select, and append your code to it. One way to achieve this is with Aspect Oriented Programming (AOP) - not easy either.
With current browsers, the most straightforward way is to use setTimeout in a loop and poll the page until the element exists.

Ok I got this thanks to Christophe! I used the Selector Listeners script from here: http://www.backalleycoder.com/2012/08/06/css-selector-listeners/
It was even more complicated coz the parent was not present either )). So what I did was that I attached the listener to the onclick just after the calendar call lol. I needed to make another function though to make it work with the script, here is the code:
var doSelect = function(){
jQuery('#timeslots').customSelect();
};
jQuery(document).ready(function(){
jQuery('.td_calendar').on('click','#anchor1',function(){
cal.select(document.forms['frmRequest'].startdate,'anchor1','yyyy-MM-dd');
document.getElementById('slots').addSelectorListener('#timeslots', doSelect);
});
});

Related

Assigning JQuery On Click Function in For Loop

I have a function that dynamically creates div elements based upon whatever input is given, and lets them choose certain items by clicking on each div. I have it so that if the div is clicked, a function (named checkToggle) is called that makes it looks like it is selected and adjusts some related variables. There is a checkbox in the div element that is toggled by this function (hence its name). Long story short, I had to jump through some hoops to get it to work, most of which I don't even remember. Please don't ask me about that.
The point of this question is this. I initially used the following JavaScript code to run the function when the checkbox was clicked. It was assigned by the main function, which created these div elements using a for loop.
document.getElementById(`${itemID}-checkbox`).onclick = function() {
checkToggle(`${itemID}-checkbox`);
};
This works, but I wanted to try to convert all of my onClick functions to JQuery. Here is the JQuery alternative I created.
$(`${itemID}-checkbox`).on(`click`, function() {
checkToggle(`${itemID}-checkbox`);
});
While the code itself seems to be fine, it does not work. It seems as if JQuery functions cannot be created like this in a for loop or something. It is applied after the element is created and put in its place, so I don't think it has anything to do with the element not being ready. I am also having the same issue with 2 other similar cases. Any idea as of why this isn't working?
Let me know if more information is needed and if so, what kind of information is needed.
You need to update the selector to Target HTML id using the # character. Simply prepend the character to the query:
$(`#${itemID}-checkbox`).on(`click`, function() { checkToggle(`${itemID}-checkbox`); });
It would also apply to DOM methods querySelector or querySelectorAll as well.
Hopefully that helps!

How to prevent javascript/jquery execution on specific HTML element?

What is the possibility of the $subject?
Just imagine I have a foo html element
e.g.
<div data-toggle="loader">...</div>
and have a jquery function binded to it by default,
e.g.
$(document).ready(function(){
$('[data-toggle=loader]').loader();
});
So this will change the DOM element to something like,
e.g.
<div data-toggle="loader" class="active" style="height:800px">...</div>
So what I want to do is prevent applying the changes to the foo element, if it has a class name .example. So the catch is, I cannot touch the default execution code. But I can write another function to handle it. That is the problem I'm facing right now. Any possibility of achieving this?
Easiest would be to either change the DOM structure, i.e. so the JS no longer finds the element, or overwrite the jQuery plugin with something innocuous. Do this in a script after the plugin script itself has loaded.
jQuery.fn.loader = jQuery.noop; //$.noop is an empty, pointless function
[EDIT]
In light of the OP's comment, the best bet may be to store a clone of the element then replace the original element with it after the plugin has fired.
var
el = $('.some-element'),
clone = el.clone(1, 1);
//some time passes... plugin is called... does nothing to element
el.replaceWith(clone);

Jquery remove function follow up

I submitted this question last week:
chrome not working with jquery remove
and was able to resolve it (stupidity on my part really), however my example was very simple. Currently I'm trying to use .remove to eliminate a complete div from a page before sending an array of inputs to an ajax function. However, I am not able to get .remove to work at all.
Here's my latest try:
http://jsfiddle.net/CJ2r9/2/
I get function not defined on the jsfiddle on multiple browsers. On my application I get absolutely no errors, but nothing works either.
I'm relatively new to javascript scopes, so if the problem is scope-wise then please let me know how I'm screwing up.
I have also tried using the .on jquery function, but it's a bit more confusing considering my div ids are dynamically loaded from the server (jstl, spring MVC, etc). If that's a solution please let me know how I can get on the right track.
Thank you!
The two problems in your jsFiddle are:
Scope: removeElem is not in global scope, since you left the default configuration option to execute the code on DOM ready. You can change it to "no wrap" to make the funciton global.
The elements you want to remove don't exist. The div elements have IDs like "removeXXXp" and in your event handlers you pass "removeXXXs".
Here is an other, simpler solution (in my opinion) for element removal. Given your markup:
<div class="scheduleSet" id="remove315p">
<!-- ... -->
Remove
</div>
You can use .on like so:
$('.schduleSet a.optionHide').on('click', function() {
// traverses up the DOM tree and finds the enclosing .schduleSet element
$(this).closest('.scheduleSet').remove();
});
You don't even need IDs at all.
I made a simple fiddle, the inline onclick doesn't see the function defined in javascript so I get a ReferenceError: myRemove is not defined.
By adding the listener in js, .remove() works fine.
Sorry I don't know what causes the difference in behavior though.
Test it out: http://jsfiddle.net/xTv5M/1/
// HTML5
<div id="removeme">foo bar</div>
<button onclick="myRemove('removeme')">Go</button><br>
<div id="removeMe2">foo bar</div>
<button id="go2">Go Again</button>
// js
function myRemove(name){
$('#'+name).remove()
};
$('#go2').click(function(){ myRemove('removeMe2') });
I see that you are already using jquery. Why dont you do it this way:
<div id="foo">This needs to be removed</div>
Remove
function removeElem(element){
$('#'+element).remove();
}
$(function(){
$("#remove").click(function(){
removeElem($(this).data('remove'));
});
})
Fiddle here: http://jsfiddle.net/vLgpk/
They way this works is, using data-remove (can be anything like data-xyz btw), binds the remove link with the div. You can then read this binding later when remove is clicked.
If you are new to jQuery, and wondering what data-remove is, its just custom attribute that you can add to you code which can be later retrieved using the data() call on the element. Many great frameworks like Bootstrap use this approach.
Advantage of using this approach in my opinion is you can have the remove links anywhere in your UI and they don't need to be related structurally to your divs by siting inside them.

using jQuery to change, only the elements that were loaded via ajax

For each checkbox on the web page, I replace it with a slider that I borrowed from jsfiddle.net/gnQUe/170/
This is done by going through the elements when the document is loaded.
Now the problem is that when more content is loaded via ajax, the new checkboxes are not transformed.
To solve the problem, I used AjaxComplete event to go through all the elements again and replace the checkboxes with sliders.
Now the problem happens that elements that were already replaced, get two sliders. To avoid that I check if the checkbox is hidden and next element is div of class "slider-frame", then don't process the re-process the element.
But I have a lot of other such controls as well, and I am presume I am not the only one that has this problem. Is there another easy way around it?
There exists jQuery live/on( http://api.jquery.com/on/ ) event but it requires an event as an argument? whereas I would like to change the look of my controls when they are rendered.
Another example of the same problem is to extend some controls that are loaded via ajax with jQuerys autocomplete plugin.
Is there a better way to accomplish this other than changing some attributes on the element.
To summarize, on document load I would like to process every element in DOM, but when more elements are loaded via ajax then I want to change only the new elements.
I would assume that when the element's are transformed into a slider, a class is added to them. So just add a not clause.
$(".MySelector").not(".SomeClassThatSliderAddsToElement").slider({});
So in the case of your code do something like this
$('.slider-button').not(".sliderloaded").addClass("sliderloaded").toggle(function(){
$(this).addClass('on').html('YES');
$('#slider').val(true);
},function(){
$(this).removeClass('on').html('NO');
$('#slider').val(false);
});
Since you said you do not want to add anything else, how about you change the toggle function to click.
$(document).on("click", ".slider-button", function(){
var elem = $(this);
elem.toggleClass("on");
var state = elem.hasClass("on");
elem.text(state?"YES":"NO");
elem.parent().next().val(state);
});
Running fiddle: http://jsfiddle.net/d9uFs/

Remove unique ID from the DOM

I am working on a site that has a pretty funky modal box implemented and right now it is out of scope to implement something new so I am doing my best trying to work with what currently exists. The way it works is every time a new modal window is created it is assigned a unique ID.. for example
<div id="window_1308937649703" class="dialog">
To close the window the close button has an onclick like :
onclick='Windows.close("window_1308937649703", event)'
I am trying to destroy the window from another click event but I am unsure on what the best way to accomplish this would be. I am thinking I could use the dialog class to pull the associated unique #window_ id. Is there also some javascript I could use to getElementsByClassName('dialog') and remove it completely from the DOM ? I do have the Prototype library to work with as well if that is any help. I cant make much sense of the actual modal scripts so I am hoping for some kind of work-around solution.
To totaly remove the dialog from the dom use:
function removeNodeByID ( nodeId){
var node = document.getElementById( nodeId );
node.parentElement.removeChild(node);
};
with
onclick="removeNodeById('window_1308937649703')"
this way you just need the ID of the dialog which you mentioned you could retreive in the question.
There's not much you can do re: getElementsByClassName() in raw JavaScript (except rolling your own), although Prototype has some good functionality for this.
Another possible approach: does the close button have a generic ID? If so, and if you're able to add plugins (sorry, I've never used Prototype), you could look at this thread to get an idea how to trigger the click event on that close button once you've selected it.
As you have prototype you could simply use:
$$('.dialog').first().remove();
Also, if you are using prototype, you should probably avoid onClick, and use an event observer instead:
<button id="dialogremover">Remove</button>
<script type="text/javascript">
$('dialogremover').observe('click', function(ev) {
ev.stop();
$$('.dialog').first().remove();
});
</script>
This has two benefits:
It's much easier on the eyes!
It's possible to put the JS in an external script an clean up your HTML.

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