$ not available in onload - javascript

I cant understand the error where $ is unidentified when using onload on my page. This is just as sample page I created where I need to call a function after loading the page.
Jquery Code
$(document).ready(function(){
alert("loaded");
});
<html>
<head>
</head>
<body>
</body>
<script src="../Jquery/contact.js"></script>
<script src="../Jquery/jquery-1.12.0.min.js"></script>
<script src="../Jquery/jquery-migrate-1.2.1.min.js"></script>
<script src="../Jquery/jquery.SPServices-2014.01.min.js"></script>
<link rel="stylesheet" type="text/css" href="../CSS/default.css"/>
<link rel="stylesheet" type="text/css" href="../bootstrap-3.3.6-dist/css/bootstrap.css"/>
<link rel="stylesheet" type="text/css" href="../bootstrap-3.3.6-dist/css/bootstrap.min.css"/>
<link rel="stylesheet" type="text/css" href="../bootstrap-3.3.6-dist/css/bootstrap-theme.css"/>
<link rel="stylesheet" type="text/css" href="../bootstrap-3.3.6-dist/css/bootstrap-theme.min.css"/>
</html>

Two issues here:
It's invalid to put script or link tags as direct children of html, so it doesn't surprise me that it doesn't work correctly on at least some browsers. You need to put them in the body or head. The only valid content of the html element is a single head element followed by a single body element.
Standard guidance, for instance in the YUI Best Practices for Speeding Up your Website is:
Put the link tags in head
Put the script tags at the bottom of body, just prior to the closing </body> tag
It looks like your contact.js file calls $() immediately (not in response to an event). If so, then contact.js must be after jQuery in the list of scripts, so that jQuery has been loaded when your code runs.
So:
<html>
<head>
<link rel="stylesheet" type="text/css" href="../CSS/default.css"/>
<link rel="stylesheet" type="text/css" href="../bootstrap-3.3.6-dist/css/bootstrap.css"/>
<link rel="stylesheet" type="text/css" href="../bootstrap-3.3.6-dist/css/bootstrap.min.css"/>
<link rel="stylesheet" type="text/css" href="../bootstrap-3.3.6-dist/css/bootstrap-theme.css"/>
<link rel="stylesheet" type="text/css" href="../bootstrap-3.3.6-dist/css/bootstrap-theme.min.css"/>
</head>
<body>
<script src="../Jquery/jquery-1.12.0.min.js"></script>
<script src="../Jquery/jquery-migrate-1.2.1.min.js"></script>
<script src="../Jquery/jquery.SPServices-2014.01.min.js"></script>
<script src="../Jquery/contact.js"></script>
</body>
</html>
Side notes:
You might look at script and CSS combining and minifying, to avoid having a lot of HTTP requests.
Consider adding <!doctype html> at the very top to ensure the browser is in standards mode (not quirks mode).
Consider adding <meta charset="UTF-8"> at the top of head (ensuring that the file is indeed in UTF-8, or changing the "UTF-8" in that to whatever encoding you're actually using in the file).

thanks for the input. so basically I had 2 problems on this. I solved the first one by moving the contact.js to the bottom and removing the migrate plugin.

Related

Why sometimes my javascript doesn't get applied on my php

I have a lot of scripts and styles in head tag and sometimes they don't load properly. Here's how my head looks like:
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.1.3/dist/css/bootstrap.min.css" rel="stylesheet">
<link rel="stylesheet" href="w3.css">
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.1.3/dist/js/bootstrap.bundle.min.js"></script>
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD#48,500,1,0" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"
integrity="sha512-894YE6QWD5I59HgZOGReFYm4dnWc1Qt5NtvYSaNcOP+u1T9qYdvdihz0PPSiiqn/+/3e7Jo4EaG7TubfWGUrMQ=="
crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<!--<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">-->
<script src="index.js"></script>
<title>NCA</title>
</head>
However when I reload my page, everything works properly and my js gets applied on my php exactly the way I want...
Can you tell what's going on and why the first time I load my page, my js doesn't work properly?
Note that: I can't do $(document).ready(function () { ... }); as there are many functions in my index.js file and also I want to force the body load after head is loaded... Is there any way to do it?
It is a good practice to put the script tags after the body tag, to ensure that the body its the first thing to load, it doesn't work that way with the css because you want the css to load first
I had a similar problem tha I solved using defer after the script src, example:
<script src="demo_defer.js" defer></script>
https://www.w3schools.com/tags/att_script_defer.asp

How to activate themes in fullcalendar.js?

I want to make a calendar view in javascript. I'm using this plugin, but the theme won't show, just trying to use standard theme. Does anyone know why?
https://fullcalendar.io/docs/theming
<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment-with-locales.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.10.0/fullcalendar.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.10.0/fullcalendar.min.css">
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.10.0/fullcalendar.print.css">
<script>
$(function() {
$('#calendar').fullCalendar({
themeSystem : "standard",
dayClick: function() {
alert('a day has been clicked!');
}
})
});
</script>
</head>
<body>
<div id="calendar"></div>
</body>
</html>
https://jsfiddle.net/03d1ahwy/
The problem is that
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.10.0/fullcalendar.print.css">
must be changed to
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.10.0/fullcalendar.print.css" media="print">
(i.e. you must add the attribute media="print" to the link tag)
otherwise you'll always get the print layout, even on-screen. See here for more details about the "media" attribute.
Once you add that, it tells the print CSS to only take over when the user is trying to print the page, and lets the standard theme be used in the in-browser version.
Demo: https://jsfiddle.net/40f1z3ts/
P.S. If you just want to use the standard theme, you don't actually need to write themeSystem : "standard", in your code at all - this is the default value, so you can just omit it.
P.P.S. Of course if you want to use any other themes you have to set the theme system appropriately and include the relevant CSS files in your page.
looks like you are having problems with the libraries
download full calendar from here:
https://fullcalendar.io/download
make a folder and name it "lib" add fullcalendar.min.css, fullcalendar.print.min.css and moment.min.js inside it and use the next headers
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href='lib/fullcalendar.min.css' rel='stylesheet' />
<link href='lib/fullcalendar.print.min.css' rel='stylesheet' media='print' />
<script src='lib/moment.min.js'></script>
<script src='lib/fullcalendar.min.js'></script>
Edit:
for bootstrap 4 theme add:
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
for jquery-ui theme add:
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.4/jquery-ui.css">

Javascript file placed in external file not executing

I made a webpage that inputs user's feedback using a form. On successful submit I display a thank you message on the same page, for which I'm using javascript.
The code executes well when I put the javascript on the same page. However, when I tried to separate the script onto a file (in a test webserver), it stopped executing.
Can you please help?
Relevant codes are mentioned below:
Head Element
<head>
<meta charset="utf-8" />
<!-- For proper rendering and touch zooming in mobile devices -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="shortcut icon" type="image/x-icon" href="images/logo.ico" />
<title><?= htmlspecialchars($title) ?></title>
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />
<link rel="stylesheet" type="text/css" href="http://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css" />
<link rel="stylesheet" type="text/css" href="http://yui.yahooapis.com/pure/0.6.0/pure-min.css" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" type="text/css" href="css/style.css" />
<script type="text/javascript" src="../javascript/submit-logic.js"></script>
</head>
First 2-3 lines of the javascript function:
$(function ()
{
$('form').submit(function (e)
{
e.preventDefault();
Detailed code (HTML, CSS, Javascript) can be found in my codepen (this is working as expected) : http://codepen.io/abbor123/pen/YGwVXg
Javascript folder is placed outside the Public folder and has 755 permission.
Edit 1:
File Tree Screenshot:
Console Error Screenshot: (submit-logic.js is the name of my javascript file. The URL mentioned on hovering over this link is: /javascript/submit-logic.js:1 )
The javascript code page is available at the following URL:
https://gist.github.com/abor123/3193eb399c3f973be453ae9a8fcc0ce5
Move your javascript folder into public_html. As Quentin commented, your server likely isn't set up to serve any files outside public_html.

Javascript page not linking to my HTML File

I was originally just using JSFiddle, but I wanted to move my project over to Notepad++ so I could have the files on my computer. The problem is, my Javascript on my page is not going into effect.
Heading Code:
<head>
<link href="C:/HTML/App/app.css" type="text/css" rel="stylesheet" />
<script type='text/javascript' src='C:/HTML/App/app.js'></script>
<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.9.1/jquery-ui.min.js"></script>
</head>
Any reason why? It links to my style sheet just fine, but my app.js does not seem to be working.
Three things:
app.js uses jQuery so the jQuery file needs to be included first
Also, you said you're running this on your PC. You could be using localhost, but if you're running from file://, src="//... won't work because your browser will be looking for file://ajax.googleapis.com/ajax/libs/jqueryui/1.9.1/jquery-ui.min.js instead of http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.1/jquery-ui.min.js so all you need to do is add the http:
But did you mean jQuery not jQuery UI? (Thanks #ahren)
<head>
<link href="C:/HTML/App/app.css" type="text/css" rel="stylesheet" />
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<!-- <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.1/jquery-ui.min.js"></script> -->
<script type='text/javascript' src='C:/HTML/App/app.js'></script>
</head>
Jquery comes first, like so:
<head>
<link href="C:/HTML/App/app.css" type="text/css" rel="stylesheet" />
<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.9.1/jquery-ui.min.js"></script>
<script type='text/javascript' src='C:/HTML/App/app.js'></script>
</head>

Include JavaScript File from Routed URL

I have a master page with the following lines inside my <head> tags.
<link href="Styles/Style.css" rel="stylesheet" type="text/css" />
<script src="Scripts/navmenu.js" type="text/javascript"></script>
When I navigate to a page that uses URL routing, the lines above generate the following HTML.
<link href="../../Styles/Style.css" rel="stylesheet" type="text/css" />
<script src="Scripts/navmenu.js" type="text/javascript"></script>
Based on the mapped URL, the stylesheet link is correct. How can I get the script link to also be correct?
P.S. I tried setting runat="server" in the script link but that just seems to confuse ASP.NET. The entire project fails to compile based on bogus errors reported in my JavaScript file. (The javascript file runs fine otherwise.)
It looks like the best answer is this:
<link href="Styles/Style.css" rel="stylesheet" type="text/css" />
<script src='<%= ResolveClientUrl("~/Scripts/navmenu.js") %>' type="text/javascript"></script>
Note that if I use the ResolveClientUrl() for the stylesheet <link> tag, it doesn't work. Apparently, there is special handing for this tag.

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