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onclick not triggering all codes in jquery

I'm trying to show spinner and overlay before sending an ajax request. But The onclick event directly sending the ajax request without showing the overlay and spinner. Can anyone point me out what i'm doing wrong! here is my code
$(document).ready(function() {
$(".refreshBtn").on('click', function() {
$("#overlay").css('display', 'block');
$(".spinner").css('display', 'block');
TableDataContent();
});
function TableDataContent() {
$(".all_tab_content").html('');
var tableDiv = '<div id="Leaderboard" class="tabcontent"><table class="table-striped"><tbody></tbody></table></div>';
$(".all_tab_content").append(tableDiv);
var tableBody = $('#Leaderboard tbody');
$.ajax({
type: 'get',
url: 'https://sheets.googleapis.com/v4/spreadsheets/{SHEET_ID}/values/Leaderboard?key={API_KEY}',
async: false,
success: function(response) {
}
});
$("#overlay").css('display', 'none');
$(".spinner").css('display', 'none');
}
});

You are hiding the spinner before ajax finishes put hide them from inside the complete callback so they can be hidden even when the ajax fails.
$.ajax({
type: 'get',
url: 'https://sheets.googleapis.com/v4/spreadsheets/{SHEET_ID}/values/Leaderboard?key={API_KEY}',
async: false,
success: function(response) {
},
complete: function(xhr, textStatus){
$("#overlay").css('display', 'none');
$(".spinner").css('display', 'none');
}
});

Your spinner does not show because AJAX requests are asynchronous. It means that it will be executed while the script continue to be executed too.
To correct that, move instructions which hide the overlay and the spinner in the success callback of your AJAX.

Right now you are hiding .spinner and #overlay without waiting for ajax to complete. Ajax's success callback happening when data is received, this is exactly the moment you want hiding .spinner and rest.
$.ajax({
type: 'get',
url: 'https://sheets.googleapis.com/v4/spreadsheets/{SHEET_ID}/values/Leaderboard?key={API_KEY}',
async: false,
success: function(response) {
$("#overlay").css('display', 'none');
$(".spinner").css('display', 'none');
// rest of your business
}
});

The problem is entirely due to your use of async: false. It's incredibly bad practice as it prevents the browser from being updated while the request is in progress. It's for this reason you never see the UI changes.
To fix this, remove async: false and instead work with the async callbacks of $.ajax(), like this:
$(function() {
$(".refreshBtn").on('click', function() {
TableDataContent();
});
function TableDataContent() {
var $indicators = $("#overlay, .spinner").show(); // show the loading indicator when the request starts...
var tableDiv = '<div id="Leaderboard" class="tabcontent"><table class="table-striped"><tbody></tbody></table></div>';
$(".all_tab_content").empty().append(tableDiv);
var $tableBody = $('#Leaderboard tbody');
$.ajax({
type: 'get',
url: 'https://sheets.googleapis.com/v4/spreadsheets/{SHEET_ID}/values/Leaderboard?key={API_KEY}',
success: function(response) {
// work with the response here...
},
complete: function() {
$indicators.hide(); // hide the loading indicator when the request ends
}
});
}
});
Note the use of empty(), show() and hide() here.
You also presume you need to change {SHEET_ID} and {API_KEY} in the URL to their actual values - presuming that's not just redacted data in the question.

Run JS function on .load() content

I have a function called timepicker which is usually called by using
$(document).ready(function() {
$('#timepicker').timepicker();
});
But I have been unable to make it work on content that is displayed using jQuery .load().
I have tried several methods including using the below but nothing happens?
$(document).ready(function() {
var $parent = $('#small_container');
var time = $parent.find('#timepicker');
time.timepicker();
});
The #small_container is the ID of the DIV that the content is loaded into and the #timepicker is the id of the input that should call the function when it is clicked on.
Have I added it to the correct place in the callback?
$('.edit_job').on("click", function(){
var week_start = $('input[name=week_start]').val();
var job_id_del= $('input[name=job_id]').val();
var user_id = $('input[name=user_id]').val();
$('#small_container').load('ajax/edit_weekly_job_load.php?job_id='+job_id_del+'&week_start='+week_start+"&user="+user_id);
$('#timepicker').timepicker();
$('#small_container').on("click", '#edit_job_submit', function(){
jQuery.ajax({
type: "POST",
url: "ajax/edit_weekly_job_ajax.php",
dataType: "json",
data: $('#edit_job_form').serialize(),
success: function(response){
if(response.success === 'success'){
window.opener.$("#diary").load("ajax/diary_weekly_load.php?week_start="+week_start+"&user="+user_id);
window.close();
}
},
});//end ajax
});//save_job_edit_submit
});//end edit job

The content is loaded asynchronously to the element #small_container. The timepicker function is gets called before the content is actually loaded. Try to call the function in the callback of load() method:
$('#small_container').load('ajax/edit_weekly_job_load.php?job_id='+job_id_del+'&week_start='+week_start+"&user="+user_id ,function(){
$('#timepicker').timepicker();
} );
Also validate that element #timepicker is actually appended to the element #small_container.

Jquery/AJAX function not working

I already asked some questions about ajax, but I still don't get it.
I took a script that I found on the internet and made some modifications, but it didn't work!
HTML:
<a data-toggle="team" id="times">TEAM</a>
ORIGINAL SCRIPT:
<script>
// THIS IS WHERE THE MAGIC HAPPENS
$(function() {
$('nav a').click(function(e) {
$("#loading").show();
href = $(this).attr("href");
loadContent(href);
// HISTORY.PUSHSTATE
history.pushState('', 'New URL: '+href, href);
e.preventDefault();
});
// THIS EVENT MAKES SURE THAT THE BACK/FORWARD BUTTONS WORK AS WELL
window.onpopstate = function(event) {
$("#loading").show();
console.log("pathname: "+location.pathname);
loadContent(location.pathname);
};
});
function loadContent(url){
// USES JQUERY TO LOAD THE CONTENT
$.getJSON("content.php", {cid: url, format: 'json'}, function(json) {
// THIS LOOP PUTS ALL THE CONTENT INTO THE RIGHT PLACES
$.each(json, function(key, value){
$(key).html(value);
});
$("#loading").hide();
});
// THESE TWO LINES JUST MAKE SURE THAT THE NAV BAR REFLECTS THE CURRENT URL
$('li').removeClass('current');
$('a[href="'+url+'"]').parent().addClass('current');
}
</script>
MODIFIED SCRIPT:
<script>
// THIS IS WHERE THE MAGIC HAPPENS
$(function() {
$('#times').click(function(e) {
$("#loading").show();
var href = $(this).attr("data-toggle");
loadContent(href);
// HISTORY.PUSHSTATE
history.pushState('', 'New URL: '+href, href);
e.preventDefault();
});
// THIS EVENT MAKES SURE THAT THE BACK/FORWARD BUTTONS WORK AS WELL
window.onpopstate = function(event) {
$("#loading").show();
console.log("pathname: "+location.pathname);
loadContent(location.pathname);
};
});
function loadContent(url){
$.ajax({
url: 'ajaxcontdent/ajax'+url,
type: 'GET',
error: function(){
// always good to have an error handler with AJAX
},
success: function(data){
$('#content').html(data);
}
// THESE TWO LINES JUST MAKE SURE THAT THE NAV BAR REFLECTS THE CURRENT URL
$('li').removeClass('current');
$('a[href="'+url+'"]').parent().addClass('current');
};
</script>
What is wrong with my script? Nothing happens. I click in my <a> link and nothing. I already tried to put the file location on a hrefattribute, but then e.preventDefault(); doesn't work and my website runs like there is no AJAX.
In the original code, the author use some content.php file. But I don't know JSON, so I have no idea what did he put in that file.
There are no errors in the console.
My ajaxcontent/ajaxteam.php file content:
<p style="color:#fafafa;">Team</p>
It's just one line indeed. Just a test.

I think that may be a cause syntax error, I have regenerate one of your function so please use below code.
function loadContent(url){
$.ajax({
url: 'ajaxcontdent/ajax'+url,
type: 'GET',
error: function(){
// always good to have an error handler with AJAX
},
success: function(data){
$('#content').html(data);
}
});
};
Then use your operation, whatever you want, in your success block of above function.
I hope thin will help you.
Thansk

In your code if I am not wrong
url: 'ajaxcontdent/ajax'+url,
this is the main culprit.
Try this one:
url: 'ajaxcontent/ajax'+url,

Error handling with JQuery When

I am using JQuery when. The syntax looks like this:
$.when(
// Get the HTML
$.get("/feature/", function(html) {
globalStore.html = html;
}),
// Get the CSS
$.get("/assets/feature.css", function(css) {
globalStore.css = css;
}),
// Get the JS
$.getScript("/assets/feature.js")
).then(function() {
// Add CSS to page
$("<style />").html(globalStore.css).appendTo("head");
// Add HTML to page
$("body").append(globalStore.html);
});
My question
How can I do error handling when one of the call to the server results in exception (failure scenario) or error handling for any other scenario?
Since I am making Ajax request here, how can I define timeout period for the Ajax request?

deferred.then( doneCallbacks, failCallbacks ) can take a failure filter like
$.when(
// Get the HTML
$.get("/feature/", function(html) {
globalStore.html = html;
}),
// Get the CSS
$.get("/assets/feature.css", function(css) {
globalStore.css = css;
}),
// Get the JS
$.getScript("/assets/feature.js")
).then(function() {
// Add CSS to page
$("<style />").html(globalStore.css).appendTo("head");
// Add HTML to page
$("body").append(globalStore.html);
}, function(){
//there is an exception in the request
});
To setup the timeout, you can use the timeout option.
You can use it either globally like
jQuery.ajaxSetup({
timeout: 5000
})
or use $.ajax() instead of the short version $.get() with the timeout option

I think it is because the calls are async. When using:
$.ajax({
url: "file.php",
type: "POST",
async: false,
success: function(data) {
}
});
The call is synchronous.

using the $.ajax function to fetch a specific id

I'm learning how to use jQuery methods of making AJAX calls, at the moment what I would like to know is how I use the $.ajax function to return a certain elements content. I realize this can be done easily enough using .load() but would like to get the results using .ajax(). At the moment I am fetching the clicked href attribute and returning the whole pages data when I would like to just return the #container content of the page?
Sample code being used:
jQuery(document).ready(function() {
/* Ajax load in portfolio pages */
var ajaxLoader = $('#ajax-loader');
var folioContainer = $('#folio-container');
ajaxLoader.hide();
$('div.wp-pagenavi a', 'div#content').click(function(e) {
$.ajax({
url : this.href,
method : 'get',
success : function(data){
folioContainer.html(data);
}
});
e.preventDefault();
});
});

You should be able to .filter() the response from the server to select only the data you want:
success : function(data){
folioContainer.html($(data).filter('#container'));
}
Here's a jsfiddle of this solution: http://jsfiddle.net/jasper/5HSzB/
Here's an optimized version of your code:
jQuery(function($) {
/* Ajax load in portfolio pages */
var ajaxLoader = $('#ajax-loader').hide();
$('.wp-pagenavi', '#content').find('a').click(function(e) {
$.ajax({
url : this.href,
method : 'get',
success : function(data){
$('#folio-container').html($(data).filter('#container'));
}
});
e.preventDefault();
});
});

You may be better off using the load method http://api.jquery.com/load/ , read the section "Loading Page Fragments"
not sure but try:
jQuery(document).ready(function() {
/* Ajax load in portfolio pages */
$('#ajax-loader').hide();
$('div.wp-pagenavi a', 'div#content').click(function(e) {
$.load(this.href + ' #folio-container');
e.preventDefault();
});
});