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Call user defined jQuery function with JS

I use a jQuery window libray https://github.com/humaan/Modaal
which triggers events this way $("class of element").modaal({arg1, arg2,...});
--- I updated my question here to make it more general and used an iframe / Html instead of an external svg ---
To trigger an element e.g. in an external Html which is loaded within an iframe, I applied the following code to the iframe:
<iframe src="External.html" id="mainContent" onload="access()"></iframe>
which calls this function:
function access() {
var html = document.getElementById("mainContent").contentDocument.getElementById("IDofDIVelement");
html.addEventListener('click', function() {clicker();});
}
function clicker()
{
// console.log('hooray!');
$("#mainContent").contents().find("IDofDIVelement").modaal({});
//return false;
}
Actually it will only work on every second click. Any idea what I did not consider properly?
Best

You do not need to wait windows loading but iframe only:
$(function() {
$("#mainContent").bind("load",function(){
var myIframeElement = $(this).contents().find(".modaal");
myIframeElement.modaal({
content_source: '#iframe-content',
type: 'inline',
});
});
});

The reason why it did not work was that the iframe was not completely loaded, while jQuery tried to attach the function. As $(document).ready(function(){} did not work, the workaround was to initialize it with
$( window ).on( "load",function() {
$("#mainContent").contents().find("IDofDIVelement").modaal({});
});
This worked properly to attach the functionallity to an element within the iframe.
Actually modaal will vanish the envent handler after the overlay was opened and closed again.
So maybe someone wants to trigger an iframe element for modaal, too, here is a setup which would solve this issue.
(It can be optimised by #SvenLiivaks answer):
$(window).on("load", function() {
reload();
});
function reload() {
var length = $("#iframeID").contents().find("#IDofDIVelement").length;
// The following check will return 1, as the iframe exists.
if (length == 0) {
setTimeout(function() { reload() }, 500);
} else {
$("#iframeID").contents().find("#IDofDIVelement").modaal({
content_source: '#modalwrapper',
overlay_close: true,
after_close: function reattach() {
reload();
}
});
}
}

How to run code after an image has been loaded using JQuery

I'm trying to load an element only after the img element has been loaded, but I've tried everything I can think of and nothing is working. Right now I'm trying to see where the code stops working and I found that the alert I set up isn't running after the line I need the code to execute from.
$img = $('#picture');
function bubbleOnLoad() {
$(document).ready(function() {
$img.load(function(){
alert('document loaded')
$('#left-bubble').show();
})
})
The $img is defined within a function. The alert works at the document.ready line but not after the $img.load. I have tried to add eventlisteners, jquery .on, .load, and a bunch of others. I'm also calling the function to run within my init function. Can someone explain to me why nothing is working?
function choosePic()
$('.speechbubble').hide();
$('#picture').remove();
var randomNum = Math.floor(Math.random() * samplePics.length);
var img = new Image();
img.onload = function() {
$('.playing-field').prepend(img);
handleImageLoad();
}
img.src = samplePics[randomNum];
img.id = "picture";
}
var samplePics =
"assets/images/barack-obama.jpg",
"assets/images/donald-trump_3.jpg",
"assets/images/dt-2.jpg",
"assets/images/bill-clinton.jpg",
"assets/images/Rose-Byrne.jpg",
"assets/images/pic.jpeg",
"assets/images/priest.jpg",
"assets/images/tb.jpg",
"assets/images/test.jpg",
"assets/images/amy-poehler.jpg",
"assets/images/stephen-colbert.jpg",
"assets/images/aziz-ansari.jpg"
];

You had some syntax errors in your code which I corrected and came up with this:
function bubbleOnLoad() {
$img = $('#picture');
$img.load(function () {
alert('document loaded');
$('#left-bubble').show();
});
}
$(document).ready(function () {
bubbleOnLoad();
});
Here is the JSFiddle demo

In you code you are not even telling the browser it's supposed to run a code after image load. you should do something like this:
$(function(){
// DOM Content is ready, let's interact with it.
$('#picture').attr('src', 'image.jpg').load(function() {
// run code
alert('Image Loaded');
});
});
Also according to docs a common challenge developers attempt to solve using the .load() shortcut is to execute a function when an image (or collection of images) have completely loaded. There are several known caveats with this that should be noted. These are:
It doesn't work consistently nor reliably cross-browser
It doesn't fire correctly in WebKit if the image src is set to the same src as before
It doesn't correctly bubble up the DOM tree
Can cease to fire for images that already live in the browser's cache

Try this jQuery plugin waitForImages
https://github.com/alexanderdickson/waitForImages
//Javascript/jQuery
$(document).ready(function(){
var counter = 0,totalImages= $('#preloader').find('img').length;
$('#preloader').find('img').waitForImages(function() {
//fires for all images waiting for the last one.
if (++counter == totalImages) {
$('#preloader').hide();
yourCallBack();
}
});
});
/*css*/
#preloader{
position:absolute;
top:-100px;/*dont put in DOM*/
}
#preloader > img{
width:1px;
height:1px;
}
<!--HTML [add the plugin after jQuery] -->
<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery.waitforimages/1.5.0/jquery.waitforimages.min.js" ></script>
<!--HTML [after body start] -->
<div id=preloader>
<img src="1.jpg" />
<img src="2.jpg" />
<img src="3.png" />
<img src="4.gif" />
<img src="5.jpg" />
</div>

You can only access the HTML element after it was created in DOM.
Also you need to check if the image was loaded before showing.
Thus your code need to look something as below:
$(document).ready(function() {
bubbleOnLoad();
});
function bubbleOnLoad() {
var newSrc = "https://lh5.googleusercontent.com/-lFNPp0DRjgY/AAAAAAAAAAI/AAAAAAAAAD8/Fi3WUhXGOY0/photo.jpg?sz=328";
$img = $('#picture');
$img.attr('src', newSrc) //Set the source so it begins fetching
.each(function() {
if(this.complete) {
alert('image loaded')
$('#left-bubble').show();
}
});
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="left-bubble" style="display:none">
<img id="picture"/>
</div>

JavaScript Only Image Hover

This is purely for learning purposes; I know that CSS would be the preferred method for this situation.
I know that in JavaScript, you can use inline event handling to hover over an image, like so:
<img src="image.png" onMouseover="src='image2.png'" onMouseout="src='image.png'">
And I know you can install jQuery in your site, and do the following code or similar:
HTML:
<img src="image.png" id="image-hover">
jQuery:
$(document).ready(function() {
$( "#hover-example" ).mouseover(function(){
$(this).attr("src", "image-hover.png");
});
$( "#hover-example" ).mouseout(function(){
$(this).attr("src", "image.png");
});
});
I was wondering how one would use JavaScript-only to produce that output, but use an external script instead of inline event handling. I've tried browsing through various Stack Overflow and Google searches, but mostly they lead to using jQuery instead. Could it be that complicated to apply that simple inline JavaScript to an external script?
Thanks!

var image = document.getElementById("hover-example");
image.onmouseover = function() { image.src = "image-hover.png"; }
image.onmouseout = function() { image.src = "image.png"; }

Pretty much the same way
var img = document.getElementById('image-hover');
img.addEventListener('mouseenter', function() {
this.src = 'image-hover.png';
}, false);
img.addEventListener('mouseleave', function() {
this.src = 'image.png';
}, false);

Since you're interested in a vanilla JavaScript implementation, take a look at the documentation for the mouseover event.
You can achieve your desired result by doing something like this:
var img = document.getElementById('image-hover');
img.addEventListener('mouseenter', function() {
this.src = 'image-hover.png';
}, false);
img.addEventListener('mouseleave', function() {
this.src = 'image.png';
}, false);

How do I make my click catcher work?

I'm trying to create a simple click catcher where if you click .image-class the javascript will take the href from another element with a class name of .btn and send you to it's destination. Though I keep getting errors on lines 7 & 10 saying that undefined is not a function. How do I make this work?
<script>
var ClickCatcher=
{
init:function(){
var link = jQuery('.btn')[1].href;
var imgCatch = jQuery('.image-class');
imgCatch.addEventListener("click", ClickCatcher.clickListener, false);
},
clickListener:function(){
window.location = link;
}
};
ClickCatcher.init();
</script>

You can do this with jquery with a simple click event
jQuery('.image-class').on('click', function (){
window.location = jQuery('.btn').eq(1).attr('href');
});
But if you still want to write in the way you have you can do:
var ClickCatcher = {
init: function () {
jQuery('.image-class').on('click', function (){
window.location = jQuery('.btn').eq(1).attr('href');
});
}
};
ClickCatcher.init();
Just make sure to fire the init method after dom load.
update: One issue with it is that you have coded your target etc in the code rather then pass it, so its going to be hard to reuse, you'd be better off doing:
var ClickCatcher = {
init: function ($button, loc) {
$button.on('click', function (){
window.location = loc;
});
}
};
ClickCatcher.init(jQuery('.image-class'), jQuery('.btn').eq(1).attr('href'));
That way the internal working is seperate from the dom (as you are passing the dom dependencies to the function.

#atmd showed a very good way of doing this. If you just want to know what your mistake was though. It is wa an error in your jQuery stament to get the btn href
jQuery('.btn')[1].href
you need to call the attr function and then get the href attr. and use .eq(1) to reduce the set to the first btn
jQuery('.btn').eq(1).attr('href);

Html div on load event for a dynamically added div element

How i can make some thing like this?
<div id='myDiv' onload='fnName()'></div>
can't use
window.onload = function () {
fnName();
};
or
$(document).ready(function () {fnName();});
the div element is dynamic. The div content is generated by xml xsl.
Any ideas?

You can use DOM Mutation Observers
It will notify you every time the dom changes, e.g. when a new div is inserted into the target div or page.
I'm copy/pasting the exmple code
// select the target node
var target = document.querySelector('#some-id');
// create an observer instance
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(mutation) {
console.log(mutation.type);
});
});
// configuration of the observer:
var config = { attributes: true, childList: true, characterData: true }
// pass in the target node, as well as the observer options
observer.observe(target, config);
// later, you can stop observing
observer.disconnect();

The onload attribute probably wouldn't fire on the <div> if you're injecting it dynamically (as the document is likely already loaded, but maybe it'd still work...?). However you could either poll for the element by simply doing something like this (similar to YUI's onContentAvailable):
// when the document has loaded, start polling
window.onload = function () {
(function () {
var a = document.getElementById('myDiv');
if (a) {
// do something with a, you found the div
}
else {
setTimeout(arguments.callee, 50); // call myself again in 50 msecs
}
}());
};
Or you could change the markup (I know nothing about XSL) to be something like this:
Earlier on in the page:
<script type="text/javascript">
function myDivInserted() {
// you're probably safe to use document.getElementById('myDiv') now
}
</script>
The markup you generate with XSL:
<div id="myDiv"></div>
<script type="text/javascript">
myDivInserted();
</script>
It's a bit hacky but it should work.

If you're not already using jQuery there's no reason to start using it just for this, you can write:
window.onload = function () {
fnName();
};

You could use jQuery. The following code would be place in your <head> tags.
$(document).ready(function() {
// Your fnNamt function here
});
EDIT
Kobi makes a good point
You could also write
$(document).ready(function(){fnNamt();});,
or more simply,
$(document).ready(fnNamt);, or even
$(fnNamt)

Without jQuery with plain JS eg:
<script type="text/javascript">
function bodyOnLoad() {
var div = document.getElementById('myDiv');
// something with myDiv
...
}
</script>
<body onload="bodyOnLoad()">
....
<div id='myDiv'></div>
....
</body>

I had the same Issue, and after searching I found this.
In my case, the javascript appends the head of the index html to load a tab content html file, and onload I want to add that tab to the dom, display it and make other js stuff to change the tabs style.
I added the line with .onload = function(event) {...}
var link = document.createElement('link');
link.rel = 'import';
link.href = 'doc.html'
link.onload = function(event) {...};
link.onerror = function(event) {...};
document.head.appendChild(link);
This worked like a charm, and maybe it helps some other researcher :)
I found it on HTML5 Imports: Embedding an HTML File Inside Another HTML File

How about using jQuery/ready(..) for this?
Like here: http://api.jquery.com/ready#fn
In the context of your question,
$(document).ready(function () {fnNamt();});

I would suggest you to use jQuery.
Steps:
1. Download Jquery library from here http://code.jquery.com/jquery-1.5.min.js .
2. in your HTML, head section create a script tag and use this code below.
$(document).ready(function() {
// write your code here..
});

I'd suggest circle-style func:
SwitchFUnc = false;
function FuncName(div_id) {
var doc = window!=null ? window.document : document;
var DivExists = doc.getElementById(div_id);
if (DivExists) {
//something...
SwitchFunc = true; //stop the circle
}
}
while (SwitchFunc!=true) {
FuncName('DivId');
}