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Jquery function is starting on click but I need to stop it

I always wonder that onclick functions start to a javascript or jQuery, but How does it stop? Finally, I faced with a function in my learning progress. May you help me to find a solution?
I want to stop this function on another onclick:
function live_preview() {
var icon = document.getElementById('LivePreIcon');
if (icon.classList.contains('fa-eye-slash')) {
icon.classList.remove('fa-eye-slash');
icon.classList.add('fa-eye');
$('#result').keyup(function () {
$('#dialog').html($(this).val());
});
return;
}
if (icon.classList.contains('fa-eye')) {
icon.classList.remove('fa-eye');
icon.classList.add('fa-eye-slash');
// Stop the jquery function here
return;
}
}

var play=0;
function live_preview() {
var icon = document.getElementById('LivePreIcon');
var play;
if(!play){
if (icon.classList.contains('fa-eye-slash')) {
icon.classList.remove('fa-eye-slash');
icon.classList.add('fa-eye');
$('#result').keyup(function () {
$('#dialog').html($(this).val());
play = 1;
});
return;
}
}
else{
if (icon.classList.contains('fa-eye')) {
icon.classList.remove('fa-eye');
icon.classList.add('fa-eye-slash');
play=0;
return false;
// Stop the jquery function here
}
}
}

Jquery click firing on all elements

I am attempting to use Bootstrap's Collapse feature with custom icons from font-awesome. I am able to get the collapse to work but the problem I am having is that all of the icons are being triggered with Jquery's click, I want to scale this because at any given time the amount of "containers" can change. Any suggestions are appreciated.
$(document).ready(function () {
$faChevronDown = $('.fa-chevron-down');
var z = 0;
$faChevronDown.click(function () {
if (z == 0) {
turnUp();
z++;
} else {
turnDown();
z = 0;
}
});
});
function turnUp() {
$faChevronDown.removeClass('fa-chevron-down');
$faChevronDown.addClass('fa-chevron-up');
};
function turnDown() {
$faChevronDown.removeClass('fa-chevron-up');
$faChevronDown.addClass('fa-chevron-down');
};
JS Fiddle
Thank you
Edit : Thank you for the great answers!

You are clicking only one element, but your function is changing all icons, you have use $(this) instead in order to only change the icon you are clicking:
function toggleClass() {
$(this).toggleClass('fa-chevron-down fa-chevron-up');
};
and then use only one function:
$faChevronDown.click(toggleClass);
With this you avoid the use of Ifs and elses and the code is much simplier and small.

Set click handler on the parent element of a .fa-chevron-down element or if the parent element is not known on body element:
$(document).ready(function () {
var z = 0;
$("body").on("click", ".fa-chevron-down", function () {
if (z == 0) {
turnUp.call(this);
z++;
} else {
turnDown.call(this);
z = 0;
}
});
});
function turnUp() {
$(this).removeClass('fa-chevron-down');
$(this).addClass('fa-chevron-up');
};
function turnDown() {
$(this).removeClass('fa-chevron-up');
$(this).addClass('fa-chevron-down');
};
If you are using z variable only for switching classes fa-chevron-down and fa-chevron-up, the code could be simplified to:
$(document).ready(function () {
$("body").on("click", ".fa-chevron-down", function () {
$(this).toggleClass('fa-chevron-down fa-chevron-up');
});
});

You can pass in the element to perform granular toggling,
$(document).ready(function () {
$fa= $('.fa');
var z = 0;
$fa.click(function () {
if (z == 0) {
turnUp($(this));
z++;
} else {
turnDown($(this));
z = 0;
}
});
});
function turnUp(el) {
el.removeClass('fa-chevron-down');
el.addClass('fa-chevron-up');
};
function turnDown(el) {
el.removeClass('fa-chevron-up');
el.addClass('fa-chevron-down');
};

I'm not sure what the point of your z variable is, but you can reduce what you have, and fix the problem of not referencing the element by using this, by using just:
$(document).ready(function () {
$('.fa-chevron-down').click(function () {
$(this).toggleClass('fa-chevron-down fa-chevron-up')
});
});
jsFiddle example

Mini Refactoring Javascript Code

I want to optimize my Js code, at the moment i am rewriting the same function to launch a game in a popup. The only difference between the functions (open_web_client, open_web_client_2) is the openPopup size
I would like to use the same function for both games launched in the pop up, how can i use just a function for both in order to avoid repeating all the code?
This is the code
$(document).ready(function() {
web_client();
});
var web_client = function() {
var open_web_client = function(e) {
e.preventDefault();
if (!app.userIsLoggedIn()) {
app.showLoginPopup(translate.login_required_to_play_for_real);
} else {
if (Utils.analytics_enabled()) {
Utils.analytics_track_click('Play', $(this).attr("data-game-name"));
}
new GameWindow($(this).attr('href'), 'LOBBY').openPopup('1100x800');
}
}
var open_web_client_2 = function(e){
e.preventDefault();
if(!app.userIsLoggedIn()){
app.showLoginPopup(translate.login_required_to_play_for_real);
} else {
if(Utils.analytics_enabled()){
Utils.analytics_track_click('Play', $(this).attr("data-game-name"));
}
new GameWindow($(this).attr('href'), 'LOBBY').openPopup('1024x768');
}
}
if ($("a.ea_client").size() > 0) {
$('a.ea_client').on("click", open_web_client);
$('a.oneworks_client').on("click", open_web_client_2);
}
};

The only difference between the two functions is the value that is passed to openpopup.
So create a common function and pass the dimensions to the event handler.
var open_web_client = function(e) {
e.preventDefault();
if (!app.userIsLoggedIn()) {
app.showLoginPopup(translate.login_required_to_play_for_real);
} else {
if (Utils.analytics_enabled()) {
Utils.analytics_track_click('Play', $(this).attr("data-game-name"));
}
//here the hardcoded value is replaced with e.data.dim
new GameWindow($(this).attr('href'), 'LOBBY').openPopup(e.data.dim);
}
};
then modify the handler code to pass the dimensions uniquely
$('a.ea_client').on("click",{dim:'1100x800'}, open_web_client);
$('a.oneworks_client').on("click",{dim:'1024x768'}, open_web_client);
arguments passed this way to handlers can be accessed through data property present in the event object.

The only difference between the functions (open_web_client, open_web_client_2) is the openPopup size
That is basically begging to become a parameter of your function:
function open_web_client(e, size) {
e.preventDefault();
if (!app.userIsLoggedIn()) {
app.showLoginPopup(translate.login_required_to_play_for_real);
} else {
if (Utils.analytics_enabled()) {
Utils.analytics_track_click('Play', $(this).attr("data-game-name"));
}
new GameWindow($(this).attr('href'), 'LOBBY').openPopup(size);
}
}
$('a.ea_client').on("click", function(e) {
open_web_client(e, '1100x800');
});
$('a.oneworks_client').on("click", function(e) {
open_web_client(e, '1024x768');
});
A littlebit more advanced technique is to use a closure, with a function that creates the listener:
function make_web_client_opener(size) {
return function open_web_client(e) {
e.preventDefault();
if (!app.userIsLoggedIn()) {
app.showLoginPopup(translate.login_required_to_play_for_real);
} else {
if (Utils.analytics_enabled()) {
Utils.analytics_track_click('Play', $(this).attr("data-game-name"));
}
new GameWindow($(this).attr('href'), 'LOBBY').openPopup(size);
}
};
}
$('a.ea_client').on("click", make_web_client_opener('1100x800'));
$('a.oneworks_client').on("click", make_web_client_opener('1024x768'));

access method inside of require js

I am getting this error:
ReferenceError: overlay is not defined
overlay();
I need to access a method that is inside of requireJS in jquery.vegas. How can i do that?
require(["jquery"], function($) {
require(["files/jquery.vegas"], function(jQuery) {
set_overlay = true;
...
function overlay() {
$.vegas('overlay', {
src : 'overlays/10.png'
});
}
});
});
jquery.vegas
(function($) {
function loading() {
if (set_overlay == true) {
overlay();
}
}
})(jQuery);

In simple words, you can't access the function overlay since it is a closure function inside the annonymous function.
If the above code is in your control then I would suggest you to move the function overlay to a shared context between these two methods
ie
function overlay() {
$.vegas('overlay', {
src : 'overlays/10.png'
});
}
require(["jquery"], function($) {
require(["files/jquery.vegas"], function(jQuery) {
set_overlay = true;
...
});
});
(function($) {
function loading() {
if (set_overlay == true) {
overlay();
}
}
})(jQuery);

Recursive function : where am I wrong here?

Code :
isDomLoaded = $(function () {
setTimeout(function () {
if (renderFinished) {
renderSocial(fotoProssima);
} else {
isDomLoaded();
}
}, 300);
});
it says isDomLoaded is not a function

Thats because it isn't a function. It is a jQuery object.
What you need might be:
isDomLoaded = function () {
setTimeout(function () {
if (renderFinished) {
renderSocial(fotoProssima);
} else {
isDomLoaded();
}
}, 300);
};
If you want to run it when the DOM is ready then do this after you declare the function:
$(window).load(isDomLoaded);
However, I think what you really need is to get rid of the isDomLoaded function and just use the following:
$(document).ready(function(){
renderSocial(fotoProssima);
});

function isDomLoaded(){
//code
//recursive call
isDomLoaded();
}