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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();
}
});
}
}

JQuery not updating CSS elements after PHP include

I am loading PHP files with JQuery/Ajax.
This is the index.php file where the webpages are called
<div class = "view-screen">
<?php include('home.php'); ?>
</div>
Depending on which nav link is clicked, that page will display without refreshing.
$(document).ready(function() {
// ...
$navLinks.click( function() {
var $this = $(this)
target = $this.data('target')
toggleMenu()
$viewScreen.load(target + ".php")
$this.data('clicked', true)
if ($this.data('clicked') && target === "about") {
activateAbout()
}
return false
})
function activateAbout() {
console.log('activated')
}
}
The console log works, and displays 'activated'. The pages do load.
All of my scripts compile and link correctly to each other.
However, when I include code that updates the target page CSS in the activateAbout() function, it doesn't work. For example:
$('body').css("background-color", "white")
in activateAbout() works, but calling/updating CSS elements in the chosen .php file doesn't, such as
$('.about p').css("color", "white")
// OR
$('.about').toggleClass('activate')
I have a feeling this has something to do with the order in which these files are loaded, but I'm not sure! Thanks for the help in advance

This is common phenomenon. The reason you are not able to apply the css is because, your content is loading after, you call activateAbout(). I would recommend to call activateAbout() once the $viewScreen.load(target + ".php") loads the data successfully. jQuery.load() supports callback too. Refer to the example usage at https://www.w3schools.com/jquery/jquery_ajax_load.asp. So, it should look like
$(document).ready(function() {
$navLinks.click( function(){
var $this = $(this);
target = $this.data('target');
toggleMenu();
$viewScreen.load(target + ".php", function() {
$this.data('clicked', true);
if ($this.data('clicked') && target === "about") {
activateAbout();
}
});
return false;
});
});
function activateAbout() {
console.log('activated')
}
Also there is a trick using setTimeout which you can execute after certain time, when the view is expected to be loaded like below
if ($this.data('clicked') && target === "about") {
//The timeout period you can change accordingly
setTimeout(activateAbout, 300);
}
The recommended way is first type solution. Hope this helps you!!

Run function after page load but NOT refresh

I have a jquery function I want to run ONLY when a page is loaded the first time, not after a refresh.
Here's the code:
$(window).on("load",function() {
$("#logo-black").typed({
strings: ["Nothing^450&Co^250.^500", "^800__^400&Co^600."],
typeSpeed: 70,
backSpeed: 100,
callback: function() {
$(".typed-cursor").css("display", "none"),
setTimeout(function(){
$('.main-load').toggleClass('main-load-active'),
$('.nav-text').toggleClass('nav-text-active');
},400),
$('.nav-reveal').toggleClass('nav-reveal-active');
}
});
});
A few things to note:
-I'm using barba.js, so content is added/removed via AJAX.
Code that initializes barba.js for my project:
initFullpagePlugin();
function initFullpagePlugin (parentElement) {
var element;
element = parentElement ? $('#fullpage', parentElement) :
$('#fullpage');
if (element.length) {
// Destroys old fullPage.js object in memory,
// removes elements from DOM
if ($.fn.fullpage.destroy) {
$.fn.fullpage.destroy('all');
}
element.fullpage({
//Scrolling
autoScrolling:false,
scrollingSpeed: 2500,
easing: 'swing',
fitToSection: false
});
}
}
document.addEventListener("DOMContentLoaded", function() {
if (!('webkitClipPath' in document.body.style)) {
alert('Sorry, this demo is available just with webkitClipPath. Try with
Chrome/Safari.');
}
Barba.Pjax.init();
Barba.Prefetch.init();
var FadeTransition = Barba.BaseTransition.extend({
start: function() {
/**
* This function is automatically called as soon the Transition starts
* this.newContainerLoading is a Promise for the loading of the new
container
* (Barba.js also comes with an handy Promise polyfill!)
*/
// As soon the loading is finished and the old page is faded out, let's
fade the new page
Promise
.all([this.newContainerLoading, this.fadeOut()])
.then(this.fadeIn.bind(this));
},
fadeOut: function() {
/**
* this.oldContainer is the HTMLElement of the old Container
*/
return $(this.oldContainer).animate({ opacity: 0 }).promise();
},
fadeIn: function() {
/**
* this.newContainer is the HTMLElement of the new Container
* At this stage newContainer is on the DOM (inside our #barba-
container and with visibility: hidden)
* Please note, newContainer is available just after
newContainerLoading is resolved!
*/
document.body.scrollTop = 0;
var _this = this;
var $el = $(this.newContainer);
$(this.oldContainer).hide();
$el.css({
visibility : 'visible',
opacity : 0
});
initFullpagePlugin($el);
$el.animate({ opacity: 1 }, 400, function() {
/**
* Do not forget to call .done() as soon your transition is finished!
* .done() will automatically remove from the DOM the old Container
*/
_this.done();
});
}
});
/**
* Next step, you have to tell Barba to use the new Transition
*/
Barba.Pjax.getTransition = function() {
/**
* Here you can use your own logic!
* For example you can use different Transition based on the current
page or link...
*/
return FadeTransition;
};
});
$('.no-click').on("click", function(e) {
e.preventDefault();
});
For instance, this design studio has an animation that runs when you first load the home page, but not after a refresh. (NOTE: this seems to only apply to the mobile version, but it's what I'm trying to achieve. The element I'm animating is present on every page, so making sure it only fires on first load & ONLY on the index.html is something I'm shooting for)
Any help/suggestions/constructive criticism is appreciated!

Code executed on the client is stateless between loads. If you want to remember state from page load to page load, you can either:
Track the session on the back end.
Use cookies/local storage in the client's browser.

You can easily do this from the server side.
Check the referrer header. If it is not present, or it is not the same as the URL in the current request, go ahead and emit the jquery function so that it will execute when the page is loaded into the browser. When it is the same as the URL in the current request, just withhold the jquery script so that it can't run.
If the page is 100% static and you can't do anything like this, well, see Chase's answer.

You can use the transitionCompleted function to load your script.
Barba.Dispatcher.on('transitionCompleted', function(currentStatus, prevStatus) {
if (prevStatus) {
setTimeout(function() {
// call your script
}, 1000);
}
});
Remember that the barba.js event transitionCompleted is fired each time a new page is loaded.

How can I use jQuery and Javascript from firefox add-on?

I can't create a new element in the page. I check the page and domain when the page is onload, that's work, but I don't know how can I create a new element in the correct window page.
window.addEventListener("load", function() { myExtension.init(); }, false);
var myExtension = {
init: function() {
var appcontent = document.getElementById("appcontent"); // browser
if(appcontent)
appcontent.addEventListener("DOMContentLoaded", myExtension.onPageLoad, true);
},
onPageLoad: function(aEvent) {
var unsafeWin = aEvent.target.defaultView;
if (unsafeWin.wrappedJSObject) unsafeWin = unsafeWin.wrappedJSObject;
var locationis = new XPCNativeWrapper(unsafeWin, "location").location;
var hostis = locationis.host;
//alert(hostis);
if(hostis=='domain.com')
{
var pathnameis=locationis.pathname;
if(pathnameis=='/index.php')
{
$("#left .box:eq(0)").after('<div id="organic-tabs" class="box"></div>'); // this code somewhy doesn't working, but if I copy to FireBug it't work.
}
}
}
}
My question is: How can I use Javascript and jQuery from firefox addon when I want to manipulate html in the correct window content? What is need from here
$("#left .box:eq(0)").after('<div id="organic-tabs" class="box"></div>');
for working.

This code has a bunch of issues. For one, appcontent is not the browser, gBrowser is. So it should be:
init: function() {
gBrowser.addEventListener("DOMContentLoaded", myExtension.onPageLoad, true);
},
Then, using wrappedJSObject is absolutely unnecessary (and also not safe the way you do it).
var wnd = aEvent.target.defaultView;
var locationis = wnd.location;
Finally, you are trying to select an element in the browser document (the document that your script is running in), not in the document loaded into the tab. You need to give jQuery an explicit context to work on:
$("#left .box:eq(0)", wnd.document)
But you shouldn't use jQuery like that, it defines a number of global variables that might conflict with other extensions. Instead you should call jQuery.noConflict() and create an alias for jQuery within myExtension:
var myExtension = {
$: jQuery.noConflict(true),
....
myExtension.$("#left .box:eq(0)", wnd.document)

Here is a template you can use that incorporates your sample code. I also added an additional statement so you could see another use of jQuery. Important points:
You must load jQuery before you can use it. You should myplace the jQuery library file you want to use in Chrome, for example, in the chrome/content directory.
Use window.content.document as the context for every jQuery
operation on the contents of the Web page
Use this as the context of a successful search result to help you
insert code in the correct spot.
window.addEventListener('load', myExtension.init, false);
var myExtension = {
jq : null,
init : function() {
var app;
// Load jQuery
var loader = Components.classes["#mozilla.org/moz/jssubscript-loader;1"].getService(Components.interfaces.mozIJSSubScriptLoader);
loader.loadSubScript("chrome://myExtension/content/jquery-1.5.2.min.js");
myExtension.jq = jQuery.noConflict();
// Launch extension
if ((app = document.getElementById("appcontent"))) {
app.addEventListener("DOMContentLoaded", myExtension.run, true);
}
},
run : function() {
// make sure this is the correct Web page to change
var href = event.originalTarget.location.href;
if (href && href.match(/http:\/\/(www\.)?domain\.com\/(index\.php)/i)) {
changeScreen();
}
},
changeScreen : function() {
// make changes to the screen
// note the "window.content.document) in the first jQuery selection
myExtension.jq("#left .box:eq(0)", window.content.document).after('');
// note the use of "this" to use the search results as the context
myExtension.jq("#right", window.content.document).each(function() {
myExtension.jq("tr td", this).append('MATCH!');
});
}
}

Structure javascript and delay execution when dynamically loading scripts

I'm loading my javascript files using Modernizr.load(). Now lets say each page needs to call their own init method after everything has finished loading. But I put the loading in a template master, which is unaware of the child pages. How can the pages know when the dependencies have finished loading?
script
Page1Stuff= {
init: function(){ alert('page 1 executed'); }
}
Page2Stuff= {
init: function(){ alert('page 2 executed'); }
}
site master template
//Modernizr loads the script.
Modernizr.load([{
load: 'jquery.js',
},
{
load: 'script.js'
}]);
page1
$(function() {
Page1Stuff.init();
});
page2
$(function() {
Page2Stuff.init();
});
I think I see 2 problems here. If modernizr is still loading jquery, $ may not be defined. Also, Page2Stuff or Page1Stuff may not be defined.

In your template: Use the modernizer "complete" call back to emit a custom event to signal the loading is complete, also set a global variable saying that the scripts have been loaded.
In your page scripts: first check the global variable to see if all scripts have been loaded, if not, register a handler to listen for the custom event you emit when the loading completes.
In your template code:
// A simple object that calls its listeners when modernizer script loading completes.
global_scriptLoadingMonitor = (function() {
var listeners = [];
var isComplete = false;
return {
"addListener": function (listener) {
listeners[listeners.length] = listener;
},
"complete": function () {
isComplete = true;
for (var i = listeners.length - 1; i >= 0; i--) {
listeners[i]();
}
},
"isComplete": isComplete
}
})();
Modernizr.load([{
load: 'jquery.js',
},
{
load: 'script.js'
complete: function () {
{
global_scriptLoadingMonitor.complete();
}
}]);
Now in your Page1 do this:
if (global_scriptLoadingMonitor.isComplete) {
$(function() {
Page1Stuff.init();
});
} else {
global_scriptLoadingMonitor.addListener(function() {
$(function() {
Page1Stuff.init();
});
});
}
And similarly for page2.