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rails + jquery - errors on every page but it still works (sometimes)

I am working on a rails app. It is a standard app, using server rendered pages, and jquery. I have had a decently hard time wrangling together the jquery and i am not sure why.
I am using jquery for a couple things: a datepicker and a timepicker. That is only used for a form a user can use, and is rendered in a users section where they can create/edit.
The structure of my javascript is right now i am using 1 javascript file called main which is required in my application.js. That is all the JS i am using.
application.js
//= require jquery
//= require jquery_ujs
//= require jquery-ui
//= require bootstrap.min.js
//= require jquery.raty.min.js
//= require jquery.turbolinks
//= require chosen-jquery
//= require turbolinks
//= require main
//= require_tree .
main.js
$(document).ready(function() {
// users profile stuff
if ($('table.calendar tbody tr td ul').hasClass('active-trip')) {
$('.active-trip').parent().css('background-color', 'orange');
}
$("#trip_start_date").datepicker({
minDate: 1
});
$("#start_date").datepicker({
minDate: 1
});
$("#end_date").datepicker({
minDate: 1
});
// ==========
// js in user's trips
$('#trip_start_time').timepicker();
$('#trip_end_time').timepicker();
// ===========
});
The problem that I am having is I am using a bootstrap navbar, with some JS effects on it (dropdowns). On this one page (a resource called "Gyms", or /gyms) the JS completely breaks and leaves the navbar useless. The error that I am getting is
Uncaught TypeError: $(...).timepicker is not a function
And I notice when I get that error once, it then starts repeating and I get it on every page. But yet, when I go back to the form where i use this code, it works completely fine even with the error?
This might be a turbolinks issue, but I am really not sure. I am using these gems
gem 'jquery-rails'
gem 'jquery-ui-rails'
gem 'turbolinks'
gem 'jquery-turbolinks'
if that helps anything. I have also played around with using the jQuery CDN script rendered in application.html.erb but that doesn't really seem to help or hurt anything and is pretty much neutral. Any help would be much appreciated

Try changing the order of requiring:
//= require jquery
//= require jquery.turbolinks
//= require jquery_ujs
//
// ... your other scripts here ...
//
//= require turbolinks
put jquery.tubolinks before all other scripts but right after jquery

Compiled Javascript not Working in Production Mode

I am building an app on my local machine. When I precompile and run it in production mode, the compiled javascript stops working. Specifically, I have javascript in one coffeescript file and application.js, both in the assets folder. All other javascript (i.e. jquery in ajax forms, etc) continues to work, which is why I think it must have to do with compilation.
Here is my application.js file:
//= require jquery
//= require jquery_ujs
//= require jquery-ui/autocomplete
//= require jquery-ui/dialog
//= require autocomplete-rails
//= require dresssed
//= require raphael
//= require morris
//= require best_in_place
//= require_tree .
$('.label-stock-health').popover({ html : true});
$(document).keypress(function(e) {
if ($('.search-bar').length){
if($(".search-bar").is(":visible")) {
} else {
$(".search-bar").show();
$("#q_name_cont").focus();
}
}
});
$("#spinner").hide();
$(document).ajaxStart(function() {
$("#spinner").fadeIn('slow');
}).ajaxStop(function() {
$("#spinner").hide();
});
$(document).ready(function() {
$(".show-search").click(function(){
if ($('.search-bar').length){
$(".search-bar").toggle();
}
});
$(".best_in_place").best_in_place();
});
This functionality still works in development mode. Additionally, if I hard code the javascript into my layout template, it will work. But without the hardcoding, it does not.
Any advice on what might be the culprit? If not , what is the best way to go about debugging this?
UPDATE #1
The only two errors I am seeing in the Javascript console of Chrome developer tools are posted below. They also show on my localhost development instance, where my javascript functionality is working in full.
Uncaught Google Maps API is required. Please register the following
JavaScript library
http://maps.google.com/maps/api/js?sensor=true.(anonymous function) #
application-6ab26aa5fc5d647a3b5543af7c9838a6.js:9t.(anonymous
function) #
application-6ab26aa5fc5d647a3b5543af7c9838a6.js:9(anonymous function)
# application-6ab26aa5fc5d647a3b5543af7c9838a6.js:9 variants:565 GET
http://www.example.com/bootstrap/glyphicons-halflings-regular.woff2
404 (Not Found)

I did wrote to you in upwork.com how ever here it is... If it is working in local host but when uploaded online stops working than it is permissions problem. I have encounter same problems in godady and blue host. Try playing with permissions. For (on blue host) worked permissions to be set at 5 5 4. or 5 5 5 I did not remember correctly. How ever delete all and reupload with new permissions once you figure out what they should be.

The culprit here is the popover line, you will need to include the popover plugin if you want to use it. Comment it out and deploy your code, it will start working again.

I've just sent you a message on upwork as well, but you should check if removing turbolinks from your application.js files resolves the issue:
//= require jquery
//= require jquery_ujs
//= require turbolinks ** remove this line as turbolinks interferes with javascript occasionally.
//= require_tree .

Please include another file name custom.js and updated
$(document).ajaxStart(function() {
$("#spinner").fadeIn('slow');
});
$(document).ajaxStop(function() {
$("#spinner").hide();
});

Rails 4 with X-Editable doesn't work

I think I'm missing something... probably minor but I couldn't find a solution for the past few hours. I'm beginning with websites so forgive the noob question
I'm using this library (I've tried many...)
https://github.com/bootstrap-ruby/bootstrap-editable-rails
I do everything as instructed (see steps below)
I refresh my webpage and I have no error (meaning everything has loaded), but when I click on "superuser", nothing happens. No pop-up, no error message, just nothing. I'm thinking something is missing. Maybe some javascript isn't enabled or something... Can't tell
My application.js is like this:
//= require jquery
//= require jquery_ujs
//= require bootstrap
//= require bootstrap-editable
//= require bootstrap-editable-rails
//= require jquery.turbolinks
//= require turbolinks
//= require_tree .
Turbolinks.enableProgressBar();
I have added the file bootstrap-editable.css to my app/assets/stylesheets folder
and changed my application.css.scss to
//= require ./bootstrap
//= require rails_bootstrap_forms
//= require font-awesome
//= require_tree .
//= require_self
//= require bootstrap-editable
I then go in my class partial and add the following "dummy" snippet of code
<td>superuser</td>
I refresh my webpage and I have no error (meaning everything has loaded), but when I click on "superuser", nothing happens. No pop-up, no error message, just nothing. I'm thinking something is missing
Thanks for your help!

I don't know if you still need an answer but try the following.
Download this https://vitalets.github.io/x-editable/assets/zip/bootstrap3-editable-1.5.1.zip ( include corresponding files to your app directories).
Add something like that in your view:
<a name='name' href="#" id="username">MyUserName</a>
Add some javascript into your application.js:
$(document).ready(function() {
$('#username').editable({
type: 'text',
url: '/edit',
title: 'Enter username'
});});
Read more details here:
https://vitalets.github.io/x-editable/docs.html

Rails4 loading javascript files. (Asset Pipeline)

I am trying hard to have one of my javascript file load/work with a Rails4 app.
The file is users.js.coffee . This is a catch all javascript file that I want loaded for all pages (not necessarily just for users controller)
If I try to load by localhost:3000/assets/users.js I can see the compiled JS file. However using cmd+o on chrome doesnt load the file and also the events are not fired so I know its not working(and loading)
Also tried running bundle exec rake assets:clean assets:precompile
I do not see any 500 or 400 or js errors in console. The simplest of users.js.coffee doesnt work as well
$(document).ready ->
alert('hello')
Some configs:
applcations.js
//= require jquery
//= require jquery_ujs
//= require js-routes
//= require bootstrap-slider
//= require users
//= require_tree .
development.rb
config.assets.initialize_on_precompile = false
config.serve_static_assets = false
production.rb
# Disable Rails's static asset server (Apache or nginx will already do this)
config.serve_static_assets = true
# Compress JavaScripts and CSS
config.assets.compress = true
config.assets.compile = false
# Generate digests for assets URLs
config.assets.digest = true
config.assets.debug=true
Also the users.js.coffee was working fine before I started playing around with getting bootstrap using bootstrap-sass etc (on an tangent,eventually ended up loading bootstrap from hosted CDNs in application.haml, not sure if it should interfere with how js files are loaded/works)
Any pointers to debug this is greatly appreciated. Already spent few hours and Asset Pipeline gets me everytime
Thanks
P.S:
I am deploying to heroku (however this fails in both dev and heroku so hopefully fixing in dev should be enough)

Update application.js content by moving //= require users after all other libraries that your application's javascripts depend on but before the require_tree .:
//= require jquery
//= require jquery_ujs
//= require js-routes
//= require bootstrap-slider
//= require users
//= require_tree .
The order of requiring javascripts is important here. If your file is users.js.coffee then you need jQuery for coffeescript so jQuery must be required before users.

Rails can't include AngularJS

I'm following this tutorial and although adding it to the Gem file and bundle installing it works fine. The moment I try to include it into application.js, the file, I get the following error while loading it:
throw Error("Sprockets::FileNotFound: couldn't find file 'angular'\n (in /my/path/to/rails/app/assets/javascripts/application.js:13)")
application.js file looks like so (starting with line 13):
//= require angular
//= require jquery
//= require jquery_ujs
//= require jquery.ui.autocomplete
//= require bootstrap
//= require pusher.min.js
//= require pusher_setup
//= require_directory .
Therefore, my question is how can I successfully include AngularJS into my Rails project?
I'm currently using Rails 3.2.2, and Ruby 1.9.3.

I had face same problem. I resolved it by following way.
1) In my case, //= require_tree . was missing in application.js file.. so i have added it.
2) Restarted Apache Server (If webrick, then restart it)

After adding a gem you always have to restart the web server.
From looking at the gem's source code, it has the angular javascripts in vendor/assets/javascripts, which means they will be available by just doing //= require angular. If they don't load, it's probably because the server needs to be restarted and you need to bundle install.
As for the require_tree ., I strongly advise against that, because it means you will lose control over the order in which things get loaded.
For example angular itself is packaged with it's own version of jQuery (jQuery-lite), but if there is already jQuery present when it is loaded, it will use the global version.
Which means doing
//= reqiure angular
//= require jquery
will do something different, than
//= require jquery
//= require angular
There are many other cases when load order can matter, for example if you have Backbone.js and Underscore, you will want to load Underscore before Backbone, etc.
As a general practice I would always recommend just using require, unless you're loading your own code where order doesn't matter, for example //= require_tree ./controllers for your own directory of controllers. In that case I'd say require_tree is perfectly ok.

in your gemfile if you are using like this :
group :assets do
gem 'angularjs-rails'
end
then remove that group :assets thing, It should be simple without block:
ex:
gem 'angularjs-rails'
It will definitely work

In case anyone had a same issue and the offered solution wouldn't work.
I have added //= require angular in the asset
group :assets do
//= require angular
end
However still I was getting the same error. After a bit of search I found out that for some reason it needs to be added outside of the assets group. All good now. Not sure if this is a best way though however I am not getting this error anymore.