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when I add this code I get "ReferenceError: firebase is not defined". Where are you getting the "firebase" variable from?

firebase.js
html

I tried adding firebase.js via the script tag, bower install ,and npm install. I always get the firebase is not defined error. :( Check this issue: github.com/firebase/angularfire/issues/362

@Jim you can follow my code at: github.com/GuyMograbi/mograblog/blob/master/src/scripts/ - I use version 3.2.1. You have to use the right version as their API changes.

javascript - Uncaught ReferenceError: Firebase is not defined - Stack ...

javascript firebase firebase-database
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You should put the references to the jquery scripts first.

<script language="JavaScript" type="text/javascript" src="/js/jquery-1.2.6.min.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/jquery-ui-personalized-1.5.2.packed.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/sprinkle.js"></script>

Just to be sure this is clear: you cannot put the script reference to jquery-ui before the jquery script itself. That's what fixed the problem to me: first jquery-x.x.x.min.js, then jquery-ui-xxxxxx.js.

2 years later, still the answer is not "ticked" ) This articles describes this one and 4 more common cases when this error occurs.

@Uzbekjon That solved it for me. The path to the script was wrong in one of my HTML files.

@Jeremy, thanks a lot. Also put it before any partial view(mvc) so that it is available for any script in the partial.

this solution is not working

javascript - Uncaught ReferenceError: $ is not defined? - Stack Overfl...

javascript jquery referenceerror
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You should put the references to the jquery scripts first.

<script language="JavaScript" type="text/javascript" src="/js/jquery-1.2.6.min.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/jquery-ui-personalized-1.5.2.packed.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/sprinkle.js"></script>

Just to be sure this is clear: you cannot put the script reference to jquery-ui before the jquery script itself. That's what fixed the problem to me: first jquery-x.x.x.min.js, then jquery-ui-xxxxxx.js.

2 years later, still the answer is not "ticked" ) This articles describes this one and 4 more common cases when this error occurs.

@Uzbekjon That solved it for me. The path to the script was wrong in one of my HTML files.

@Jeremy, thanks a lot. Also put it before any partial view(mvc) so that it is available for any script in the partial.

this solution is not working

javascript - Uncaught ReferenceError: $ is not defined? - Stack Overfl...

javascript jquery referenceerror
Rectangle 27 535

You should put the references to the jquery scripts first.

<script language="JavaScript" type="text/javascript" src="/js/jquery-1.2.6.min.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/jquery-ui-personalized-1.5.2.packed.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/sprinkle.js"></script>

Just to be sure this is clear: you cannot put the script reference to jquery-ui before the jquery script itself. That's what fixed the problem to me: first jquery-x.x.x.min.js, then jquery-ui-xxxxxx.js.

2 years later, still the answer is not "ticked" ) This articles describes this one and 4 more common cases when this error occurs.

@Uzbekjon That solved it for me. The path to the script was wrong in one of my HTML files.

@Jeremy, thanks a lot. Also put it before any partial view(mvc) so that it is available for any script in the partial.

this solution is not working

javascript - Uncaught ReferenceError: $ is not defined? - Stack Overfl...

javascript jquery referenceerror
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This is because require() does not exist in the browser/client-side JavaScript.

You have three options:

<script>

(most of them require a build step before you deploy)

  • Browserify - You can use most Node.js modules in the browser. This is my personal favorite.
  • Component - Focuses on simplicity. Browser only. Made by the same guy who made Express.js, the (most) popular Node.js web framework.
  • Webpack - Does everything (bundles JS, CSS, etc). Made popular by the surge of React.js. Notorious for its difficult learning curve.

You can read more about my comparison of Browserify vs Component.

  • RequireJS - Very popular amongst client-side JavaScript developers. Not my taste because of its asynchronous nature.

Note, in your search for choosing which one to go with, you'll read about Bower. Bower is only for package dependencies and is unopinionated on module definitions like CommonJS and AMD.

Added webpack and rollup. I think it's safe to say that in 2016, it's best to avoid component. I'll eventually remove it from the list.

Could I get an example of using the <script> tag to import a React class without the use of a nodeJs package manager?

javascript - Client on node: Uncaught ReferenceError: require is not d...

javascript node.js sockets express pug
Rectangle 27 241

This is because require() does not exist in the browser/client-side JavaScript.

You have three options:

<script>

(most of them require a build step before you deploy)

  • Browserify - You can use most Node.js modules in the browser. This is my personal favorite.
  • Component - Focuses on simplicity. Browser only. Made by the same guy who made Express.js, the (most) popular Node.js web framework.
  • Webpack - Does everything (bundles JS, CSS, etc). Made popular by the surge of React.js. Notorious for its difficult learning curve.

You can read more about my comparison of Browserify vs Component.

  • RequireJS - Very popular amongst client-side JavaScript developers. Not my taste because of its asynchronous nature.

Note, in your search for choosing which one to go with, you'll read about Bower. Bower is only for package dependencies and is unopinionated on module definitions like CommonJS and AMD.

Added webpack and rollup. I think it's safe to say that in 2016, it's best to avoid component. I'll eventually remove it from the list.

Could I get an example of using the <script> tag to import a React class without the use of a nodeJs package manager?

javascript - Client on node: Uncaught ReferenceError: require is not d...

javascript node.js sockets express pug
Rectangle 27 136

This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post.

@RamSharma Actually, this is the right answer. You don't need anything else to solve the issue.

javascript - Uncaught ReferenceError: $ is not defined? - Stack Overfl...

javascript jquery referenceerror
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This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post.

@RamSharma Actually, this is the right answer. You don't need anything else to solve the issue.

javascript - Uncaught ReferenceError: $ is not defined? - Stack Overfl...

javascript jquery referenceerror
Rectangle 27 134

This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post.

@RamSharma Actually, this is the right answer. You don't need anything else to solve the issue.

javascript - Uncaught ReferenceError: $ is not defined? - Stack Overfl...

javascript jquery referenceerror
Rectangle 27 235

This is because require() does not exist in the browser/client-side JavaScript.

You have three options:

<script>

(most of them require a build step before you deploy)

  • Browserify - You can use most Node.js modules in the browser. This is my personal favorite.
  • Component - Focuses on simplicity. Browser only. Made by the same guy who made Express.js, the (most) popular Node.js web framework.
  • Webpack - Does everything (bundles JS, CSS, etc). Made popular by the surge of React.js. Notorious for its difficult learning curve.

You can read more about my comparison of Browserify vs Component.

  • RequireJS - Very popular amongst client-side JavaScript developers. Not my taste because of its asynchronous nature.

Note, in your search for choosing which one to go with, you'll read about Bower. Bower is only for package dependencies and is unopinionated on module definitions like CommonJS and AMD.

Added webpack and rollup. I think it's safe to say that in 2016, it's best to avoid component. I'll eventually remove it from the list.

Could I get an example of using the <script> tag to import a React class without the use of a nodeJs package manager?

javascript - Client on node: Uncaught ReferenceError: require is not d...

javascript node.js sockets express pug
Rectangle 27 146

jQuery needs to be the first script you import. The first script on your page

<script type="text/javascript" src="/test/wp-content/themes/child/script/jquery.jcarousel.min.js"></script>

appears to be a jQuery plugin, which is likely generating an error since jQuery hasn't been loaded on the page yet.

That was way useful! I was including it after the whole page loads up...

What is jQuery is the first script on the page and there is an error anyway?

Solved my problems in rails as well. I first included bootstrap before jquery. But then the solution was including Jquery first and then bootstrap.

ReferenceError: jQuery is not defined
code.jquery.com uses an invalid security certificate. The certificate expired on 07/31/2014 11:49 AM. The current time is 07/31/2014 12:40 PM. (Error code: sec_error_expired_certificate)

@aespinoza solution helped. One clarification, you won't see the error until you look at the homepage (root of site).

javascript - Uncaught ReferenceError: jQuery is not defined - Stack Ov...

javascript jquery
Rectangle 27 146

jQuery needs to be the first script you import. The first script on your page

<script type="text/javascript" src="/test/wp-content/themes/child/script/jquery.jcarousel.min.js"></script>

appears to be a jQuery plugin, which is likely generating an error since jQuery hasn't been loaded on the page yet.

That was way useful! I was including it after the whole page loads up...

What is jQuery is the first script on the page and there is an error anyway?

Solved my problems in rails as well. I first included bootstrap before jquery. But then the solution was including Jquery first and then bootstrap.

ReferenceError: jQuery is not defined
code.jquery.com uses an invalid security certificate. The certificate expired on 07/31/2014 11:49 AM. The current time is 07/31/2014 12:40 PM. (Error code: sec_error_expired_certificate)

@aespinoza solution helped. One clarification, you won't see the error until you look at the homepage (root of site).

javascript - Uncaught ReferenceError: jQuery is not defined - Stack Ov...

javascript jquery
Rectangle 27 146

jQuery needs to be the first script you import. The first script on your page

<script type="text/javascript" src="/test/wp-content/themes/child/script/jquery.jcarousel.min.js"></script>

appears to be a jQuery plugin, which is likely generating an error since jQuery hasn't been loaded on the page yet.

That was way useful! I was including it after the whole page loads up...

What is jQuery is the first script on the page and there is an error anyway?

Solved my problems in rails as well. I first included bootstrap before jquery. But then the solution was including Jquery first and then bootstrap.

ReferenceError: jQuery is not defined
code.jquery.com uses an invalid security certificate. The certificate expired on 07/31/2014 11:49 AM. The current time is 07/31/2014 12:40 PM. (Error code: sec_error_expired_certificate)

@aespinoza solution helped. One clarification, you won't see the error until you look at the homepage (root of site).

javascript - Uncaught ReferenceError: jQuery is not defined - Stack Ov...

javascript jquery
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This is what solved it for me. Originally I went to Google and copied and pasted their suggested snippet for jQuery on their CDN page:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

The snippet does not include the HTTP: or HTTPS: in the src attribute but my browser, FireFox, needed it so I changed it to:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

Strictly speaking the Google snippet/example is correct - their src attribute is a protocol less URL which means the browser should use the protocol (HTTP/HTTPS) of the calling page. See paulirish.com/2010/the-protocol-relative-url. This is best practice to avoid mixed content warnings if your page is ever served over SSL and the scripts are not.

One common problem here, likely, is when protocol-relative URL's are used during development, and on a sunny day you try to load a page from a local file. Your browser will optimistically try to load file://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js and you wonder why it doesn't show up in the network console.

thanks @PieterEnnes, this was exactly the case for me. Thanks to the answerer too!

javascript - Uncaught ReferenceError: $ is not defined? - Stack Overfl...

javascript jquery referenceerror
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This is what solved it for me. Originally I went to Google and copied and pasted their suggested snippet for jQuery on their CDN page:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

The snippet does not include the HTTP: or HTTPS: in the src attribute but my browser, FireFox, needed it so I changed it to:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

Strictly speaking the Google snippet/example is correct - their src attribute is a protocol less URL which means the browser should use the protocol (HTTP/HTTPS) of the calling page. See paulirish.com/2010/the-protocol-relative-url. This is best practice to avoid mixed content warnings if your page is ever served over SSL and the scripts are not.

One common problem here, likely, is when protocol-relative URL's are used during development, and on a sunny day you try to load a page from a local file. Your browser will optimistically try to load file://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js and you wonder why it doesn't show up in the network console.

thanks @PieterEnnes, this was exactly the case for me. Thanks to the answerer too!

javascript - Uncaught ReferenceError: $ is not defined? - Stack Overfl...

javascript jquery referenceerror
Rectangle 27 82

This is what solved it for me. Originally I went to Google and copied and pasted their suggested snippet for jQuery on their CDN page:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

The snippet does not include the HTTP: or HTTPS: in the src attribute but my browser, FireFox, needed it so I changed it to:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

Strictly speaking the Google snippet/example is correct - their src attribute is a protocol less URL which means the browser should use the protocol (HTTP/HTTPS) of the calling page. See paulirish.com/2010/the-protocol-relative-url. This is best practice to avoid mixed content warnings if your page is ever served over SSL and the scripts are not.

One common problem here, likely, is when protocol-relative URL's are used during development, and on a sunny day you try to load a page from a local file. Your browser will optimistically try to load file://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js and you wonder why it doesn't show up in the network console.

thanks @PieterEnnes, this was exactly the case for me. Thanks to the answerer too!

javascript - Uncaught ReferenceError: $ is not defined? - Stack Overfl...

javascript jquery referenceerror
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that exact link doesnt have error at this moment. However, __ytRIL is not defined error still un-fixed

javascript - Uncaught ReferenceError: ytcfg is not defined (also __ytR...

javascript youtube-iframe-api referenceerror
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that exact link doesnt have error at this moment. However, __ytRIL is not defined error still un-fixed

javascript - Uncaught ReferenceError: ytcfg is not defined (also __ytR...

javascript youtube-iframe-api referenceerror
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jQuery UI is just an addon to jQuery which means that first you need to include the jQuery library and then the UI.

<script src="path/to/your/jquery.min.js"></script>
<script src="path/to/your/jquery.ui.min.js"></script>

LOL I kept thinking the UI was the jquery import and was wondering why I kept getting this error. Read file names carefully

JavaScript Uncaught ReferenceError: jQuery is not defined; Uncaught Re...

jquery jquery-ui referenceerror
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jQuery UI is just an addon to jQuery which means that first you need to include the jQuery library and then the UI.

<script src="path/to/your/jquery.min.js"></script>
<script src="path/to/your/jquery.ui.min.js"></script>

LOL I kept thinking the UI was the jquery import and was wondering why I kept getting this error. Read file names carefully

JavaScript Uncaught ReferenceError: jQuery is not defined; Uncaught Re...

jquery jquery-ui referenceerror