Develop Reference

jQuery .attr Not Working Properly, Miss-Retrieving Links

This is a page I'm currently working on as a project
$(function() {
$(".modal-launcher, #modal-background").click(function() {
$(".modal-content, #modal-background").toggleClass("active");
$(".vid-1i").attr("src", "link1");
$(".vid-2i").attr("src", "link2");
$(".vid-3i").attr("src", "link3");
$(".vid-4i").attr("src", "link4");
$(".vid-5i").attr("src", "link5");
$(".vid-6i").attr("src", "link6");
$(".vid-7i").attr("src", "link7");
$(".vid-8i").attr("src", "link8");
//$('html').toggleClass('active').css('top', -(document.documentElement.scrollTop) + 'px');//
});
});
above the actual links are replaced just to display a quick idea of the bad jQuery.
In it, I am attempting to create my own popup launcher for videos; however, I am having trouble using jQuery to replace the "" src of an iframe element to a YouTube link. I am unable to figure out why the jQuery is not working. I understand that the jQuery is, of course, working properly, and that it is me who has written the code incorrectly, but here I am asking if anyone is able to figure out what it is I've done wrong, or what can be changed to make it work.
For some reason, the last video in the jQuery list is always the one retrieved.
Understand that the images are missing from the page due to them being local files and not network locations. Clicking above the captions that read like "Match One" will have the "intended" result, regardless if the image is showing or not.

Coming back to this and understanding more of JavaScript and jQuery, my problem was simply misunderstanding the code. In order to do something like this, one function per link would be more suitable.
function video1()
{
$("#popup, #modal-background").toggleClass("active");
$("#popup").prop("src", "https://www.youtube.com/embed/7h1s15n74r3all1nk");
document.getElementById('scroll').style.cssText ='overflow:hidden';
}
complementary html would look like this:
<div onclick="video1()"></div>
The previous code would run each line, effectively setting the last link as the source of the element. The new code is button independent, ensuring only one link belongs to each button.

Inline Editing But Instance Doesn't Exist

I have my own custom non-jQuery ajax which I use for programming web applications. I recently ran into problems with IE9 using TinyMCE, so am trying to switch to CKeditor
The editable text is being wrapped in a div, like so:
<div id='content'>
<div id='editable' contenteditable='true'>
page of inline text filled with ajax when links throughout the site are clicked
</div>
</div>
When I try to getData on the editable content using the examples in the documentation, I get an error.
I do this:
CKEDITOR.instances.editable.getData();
And get this:
Uncaught TypeError: Cannot call method 'getData' of undefined
So I figure that it doesn't know where the editor is in the dom... I've tried working through all editors to get the editor name, but that doesn't work-- no name appears to be found.
I've tried this:
for(var i in CKEDITOR.instances) {
alert(CKEDITOR.instances[i].name);
}
The alert is just blank-- so there's no name associated with it apparently.
I should also mention, that despite my best efforts, I cannot seem to get the editable text to have a menu appear above it like it does in the Massive Inline Editing Example
Thanks for any assistance you can bring.
Jason Silver
UPDATE:
I'm showing off my lack of knowledge here, but I had never come across "contenteditable='true'" before, so thought that because I was able to type inline, therefore the editor was instantiated somehow... but now I'm wondering if the editor is even being applied to my div.
UPDATE 2:
When the page is loaded and the script is initially called, the div does not exist. The editable div is sent into the DOM using AJAX. #Zee left a comment below that made me wonder if there is some other command that should be called in order to apply the editor to that div, so I created a button in the page with the following onclick as a way to test this approach: (adapted from the ajax example)
var editor,html='';config = {};editor=CKEDITOR.appendTo('editable',config, html );
That gives the following error in Chrome:
> Uncaught TypeError: Cannot call method 'equals' of undefined
> + CKEDITOR.tools.extend.getEditor ckeditor.js:101
> b ckeditor.js:252
> CKEDITOR.appendTo ckeditor.js:257
> onclick www.pediatricjunction.com:410
Am I headed in the right direction? Is there another way to programmatically tell CKEditor to apply the editor to a div?
UPDATE 3:
Thanks to #Reinmar I had something new to try. The most obvious way for me to test to see if this was the solution was to put a button above the content editable div that called CKEDITOR.inlineAll() and inline('editable') respectively:
<input type='button' onclick=\"CKEDITOR.inlineAll();\" value='InlineAll'/>
<input type='button' onclick=\"CKEDITOR.inline('editable');\" value='Inline'/>
<input type='button' onclick=\"var editor = CKEDITOR.inline( document.getElementById( 'editable' ) );\" value='getElementById'/>
This returned the same type of error in Chrome for all three buttons, namely:
Uncaught TypeError: Cannot call method 'equals' of undefined ckeditor.js:101
+ CKEDITOR.tools.extend.getEditor ckeditor.js:101
CKEDITOR.inline ckeditor.js:249
CKEDITOR.inlineAll ckeditor.js:250
onclick
UPDATE 4:
Upon further fiddling, I've tracked down the problem being related to json2007.js, which is a script I use which works with Real Simple History (RSH.js). These scripts have the purpose of tracking ajax history, so as I move forward and back through the browser, the AJAX page views is not lost.
Here's the fiddle page: http://jsfiddle.net/jasonsilver/3CqPv/2/

When you want to initialize inline editor there are two ways:
If element which is editable (has contenteditable attribute) exists when page is loaded CKEditor will automatically initialize an instance for it. Its name will be taken from that element's id or it will be editor<number>. You can find editors initialized automatically on this sample.
If this element is created dynamically, then you need to initialize editor on your own.
E.g. after appending <div id="editor" contenteditable="true">X</div> to the document you should call:
CKEDITOR.inline( 'editor' )
or
CKEDITOR.inlineAll()
See docs and docs.
You can find editor initialized this way on this sample.
The appendTo method has different use. You can initialize themed (not inline) editor inside specified element. This method also accepts data of editor (as 3rd arg), when all other methods (CKEDITOR.inline, CKEDITOR.replace, CKEDITOR.inlineAll) take data from the element they are replacing/using.
Update
I checked that libraries you use together with CKEditor are poorly written and cause errors you mentioned. Remove json2007.js and rsh.js and CKEditor works fine.

OK, so I have tracked down the problem.
The library I was using for tracking Ajax history and remembering commands for the back button, called Real Simple History, was using a script called json2007 which was intrusive and extended native prototypes to the point where things broke.
RSH.js is kind of old, and I wasn't using it to it's full potential anyway, so my final solution was to rewrite the essential code I needed for that, namely, a listener that watched for anchor (hash) changes in the URL, then parsed those changes and resubmitted the ajax command.
var current_hash = window.location.hash;
function check_hash() {
if ( window.location.hash != current_hash ) {
current_hash = window.location.hash;
refreshAjax();
}
}
hashCheck = setInterval( "check_hash()", 50 );
'refreshAjax()' was an existing function anyway, so this is actually a more elegant solution than I was using with Real Simple History.
After stripping out the json2007.js script, everything else just worked, and CKEditor is beautiful.
Thanks so much for your help, #Reinmar... I appreciate your patience and effort.

Problem with jQuery - error when trying to find 2 tags

I have the following DOM structure:
/*:DOC += <div id='testDiv' class='testDivClass'><div id='innerTestDiv'></div></div><span id='testSpan' class='testSpanClass'><span id='innerTestSpan'></span></span>
Now I tried to run jQuery select against them as follow. The first one returned alright, but the second one failed:
// works
var result = $('#testDiv')[0];
alert(result.id);
// failed: id is null or not an object
var result2 = $('#testSpan')[0];
alert(result2.id);
I tried selecting id instead of class and got the same results.
My question is: how can I get the second select to work? Is there some sort of invisible iterator/pointer in jQuery which I need to reset to the beginning of the DOM before the second select?
Thanks.
EDIT: Ok this is the official "does not work" version. testDiv matched, but testSpan did not, hence I got an error saying id is null or not an object error in the second alert.
UPDATE: I did a test by swapping testDiv and testSpan in the html. Now BOTH select failed.
UPDATE2: I have changed the html back to what it used to look like. I'm using JsTestDriver to write up the test, but it is actually not calling anything at the moment. The actual html looks messier than this (more nested tags). I'm trying to get this simplified version to work first. It appears that jQuery was able to get into the first select, whether it'll be span or div, but couldnt get out of it to do the second select. I've replaced jQuery.js and jsTestDriver.jar to no avail.
Thanks.

The .className selector matches by class, not ID.
Therefore, $(span.testSpan) won't match any elements.
You need to change it to $('span.testSpanClass') ot $(span#testSpan') (using the #id selector, which matches ID).
For more information, read the documentation.

I don't know why, but for me your code worked well.
I added $(document).ready(function() { before that code, and when I opened the test page, the alert box showed up perfectly, both of them! I don't know when do you want this alert box showed, but if it is when visitor open the page, just add that code. Otherwise, add
function objectid() {
var result = $('#testDiv')[0];
alert(result.id);
var result2 = $('#testSpan')[0];
alert(result2.id);
}
That code worked well for me, too.
PS: Sorry if you don't understand my bad english.

More than likely, there is something else wrong with the HTML you're actually using. Since you're posting only a tiny bit of the html, we can't actually test your problem. Post the entire page, or at least the smallest piece of it that actually has the problem when you run your test.

I tested the jQuery code you reported on JS Bin, and the code worked fine. As the code is very basic, I don't think the problem is caused by the version of jQuery used.

What I ended up doing is wrapping the entire html with a div or span tag. I found that jQuery could not get out of a div/span tag once it gets into one (in my above example), so I just make it to go into a div/span tag once.
Not sure whether this is a patch or ugly fix, but it solved my problem for now.
Thanks for all the help!

Use "#" to select by id, use "." to select by class...

Javascript getElementById - reading works, altering doesn't

So, I have this pretty complex ajax thing going.
It loads new html (including div tags and all) to show up on the page.
I included a 'more' link to load additional data.
This more link links to my javascript function. The 'more' link is located in a div, which I gave a unique id. The next time the load function is called, I use document.getElementById(the id).style.display="none"; to "remove" this div from the look of the page.
I set error traps for this, the div with that id is found without problems, but javascript fails to change my style property.
I tested alert(document.getElementById(the id).innerHTML); and that worked without problems - hence the title of the question.
So, does anyone have any ideas/do I need to offer more information? The main problem is that it doesn't throw any errors anywhere, yet it fails to complete the task I asked...
Here's a bit of code to go with it -
try
{
var myidthing = "morelink" + ContentStart.toString(); //the id is correct
var div = document.getElementById(myidthing);
if (!div)
{
}
else
{
div.style.display="none"; //this doesn't work, but doesn't raise an error
alert(div.innerHTML); //this works without problem
}
}
catch(theerr)
{
alert(theerr);
}
------------------------->EDIT<-------------------------
I'm incredibly sorry if I upset any people.
I'm also angry at myself, for it was a stupid thing in my code. Basically, I had a variable that stored the contents of a parent div. Then I (succesfully) removed the div using the removeChild() method. Then my code pasted the contents of that vaiable (including the div I wanted gone) back into the parent div.
I switched around the order and it works fine now.
Again, excuse me for this.

Throwing out a few ideas of things to look for:
You said the div is generated by javascript. Is it possible the div you are targeting is not the one you think you are? It could be you are targeting another div, which is already hidden, or obstructed... or maybe the innerHTML you are displaying goes with a different element than the one you intend to target. Put an alert or script breakpoint in the if(!div) case, also, and see if it's going down that path.
If the above code is only a stripped-down version of your actual code, check your actual code for typos (for example: style.display = "none;";)
Using the FireBug plugin for FireFox, inspect the target element after the operation completes, and make sure that the display: none appears in the style information. If not, use FireBug's debugger to walk through your javascript, and see if you can figure out why.
Use FireBug to break on all script errors, in case there is another error causing this behavior.

Try empty quotes instead of 'none' and see if that works?:
document.getElementById('element_id').style.display="";
Failing that, don't change the style, just add a class which hides the element.

What exactly can cause an "HIERARCHY_REQUEST_ERR: DOM Exception 3"-Error?

How exactly does it relate to jQuery? I know the library uses native javascript functions internally, but what exactly is it trying to do whenever such a problem appears?

It means you've tried to insert a DOM node into a place in the DOM tree where it cannot go. The most common place I see this is on Safari which doesn't allow the following:
document.appendChild(document.createElement('div'));
Generally, this is just a mistake where this was actually intended:
document.body.appendChild(document.createElement('div'));
Other causes seen in the wild (summarized from comments):
You are attempting to append a node to itself
You are attempting to append null to a node
You are attempting to append a node to a text node.
Your HTML is invalid (e.g. failing to close your target node)
The browser thinks the HTML you are attempting to append is XML (fix by adding <!doctype html> to your injected HTML, or specifying the content type when fetching via XHR)

If you are getting this error due to a jquery ajax call $.ajax
Then you may need to specify what the dataType is coming back from the server. I have fixed the response a lot using this simple property.
$.ajax({
url: "URL_HERE",
dataType: "html",
success: function(response) {
$('#ELEMENT').html(response);
}
});

Specifically with jQuery you can run into this issue if forget the carets around the html tag when creating elements:
$("#target").append($("div").text("Test"));
Will raise this error because what you meant was
$("#target").append($("<div>").text("Test"));

This error can occur when you try to insert a node into the DOM which is invalid HTML, which can be something as subtle as an incorrect attribute, for example:
// <input> can have a 'type' attribute
var $input = $('<input/>').attr('type', 'text');
$holder.append($input); // OK
// <div> CANNOT have a 'type' attribute
var $div = $('<div></div>').attr('type', 'text');
$holder.append($div); // Error: HIERARCHY_REQUEST_ERR: DOM Exception 3

#Kelly Norton is right in his answer that The browser thinks the HTML you are attempting to append is XML and suggests specifying the content type when fetching via XHR.
It's true however you sometimes use third party libraries that you are not going to modify. It's JQuery UI in my case. Then you should provide the right Content-Type in the response instead of overriding the response type on JavaScript side. Set your Content-Type to text/html and you are fine.
In my case, it was as easy as renaming the file.xhtml to file.html - application server had some extension to MIME types mappings out of the box. When content is dynamic, you can set the content type of response somehow (e.g. res.setContentType("text/html") in Servlet API).

You can see these questions
Getting HIERARCHY_REQUEST_ERR when using Javascript to recursively generate a nested list
or
jQuery UI Dialog with ASP.NET button postback
The conclusion is
when you try to use function append, you should use new variable, like this example
jQuery(function() {
var dlg = jQuery("#dialog").dialog({
draggable: true,
resizable: true,
show: 'Transfer',
hide: 'Transfer',
width: 320,
autoOpen: false,
minHeight: 10,
minwidth: 10
});
dlg.parent().appendTo(jQuery("form:first"));
});
In the example above, uses the var "dlg" to run the function appendTo.
Then error “HIERARCHY_REQUEST_ERR" will not come out again.

I encountered this error when using the Google Chrome extension Sidewiki. Disabling it resolved the issue for me.

I'm going to add one more specific answer here because it was a 2 hour search for the answer...
I was trying to inject a tag into a document. The html was like this:
<map id='imageMap' name='imageMap'>
<area shape='circle' coords='55,28,5' href='#' title='1687.01 - 0 percentile' />
</map>
If you notice, the tag is closed in the preceding example (<area/>). This was not accepted in Chrome browsers. w3schools seems to think it should be closed, and I could not find the official spec on this tag, but it sure doesn't work in Chrome. Firefox will not accept it with <area/> or <area></area> or <area>. Chrome must have <area>. IE accepts anything.
Anyway, this error can be because your HTML is not correct.

I know this thread is old, but I've encountered another cause of the problem which others might find helpful. I was getting the error with Google Analytics trying to append itself to an HTML comment. The offending code:
document.documentElement.firstChild.appendChild(ga);
This was causing the error because my first element was an HTML comment (namely a Dreamweaver template code).
<!-- #BeginTemplate "/Templates/default.dwt.php" -->
I modified the offending code to something admittedly not bulletproof, but better:
document.documentElement.firstChild.nodeType===1 ? document.documentElement.firstChild.appendChild(ga) : document.documentElement.lastChild.appendChild(ga);

If you run into this problem while trying to append a node into another window in Internet Explorer, try using the HTML inside the node instead of the node itself.
myElement.appendChild(myNode.html());
IE doesn't support appending nodes to another window.

This ERROR happened to me in IE9 when I tried to appendChild an dynamically to a which already existed in a window A. Window A would create a child window B. In window B after some user action a function would run and do an appendChild on the form element in window A using window.opener.document.getElementById('formElement').appendChild(input);
This would throw an error. Same with creating the input element using document.createElement('input'); in the child window, passing it as a parameter to the window.opener window A, and there do the append. Only if I created the input element in the same window where I was going to append it, it would succeed without errors.
Thus my conclusion (please verify): no element can be dynamically created (using document.createElement) in one window, and then appended (using .appendChild) to an element in another window (without taking maybe a particular extra step I missed to ensure it is not considered XML or something). This fails in IE9 and throws the error, in FF this works fine though.
PS. I don't use jQuery.

Another reason this can come up is that you are appending before the element is ready e.g.
<body>
<script>
document.body.appendChild(foo);
</script>
</body>
</html>
In this case, you'll need to move the script after the . Not entirely sure if that's kosher, but moving the script after the body doesn't seem to help :/
Instead of moving the script, you can also do the appending in an event handler.

I got that error because I forgot to clone my element.
// creates an error
clone = $("#thing");
clone.appendTo("#somediv");
// does not
clone = $("#thing").clone();
clone.appendTo("#somediv");

Just for reference.
IE will block appending any element created in a different window context from the window context that the element is being appending to.
e.g
var childWindow = window.open('somepage.html');
//will throw the exception in IE
childWindow.document.body.appendChild(document.createElement('div'));
//will not throw exception in IE
childWindow.document.body.appendChild(childWindow.document.createElement('div'));
I haven't figured out how to create a dom element with jQuery using a different window context yet.

I get this error in IE9 if I had disabled script debugging (Internet Explorer) option. If I enable script debugging I don't see the error and the page works fine. This seems odd what is the DOM exception got to do with debugging either enabled or disabled.