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Learn how to Repair Reference Error: $ shouldn’t be outlined in jQuery and JavaScript [Solved]


Hey JavaScript developer, if you’re questioning easy methods to repair the Reference Error $ shouldn’t be outlined whereas utilizing jQuery then you have got come to the fitting place. “Reference Error: $ shouldn’t be outlined” is without doubt one of the widespread JavaScript errors which come once you attempt to use $, which is a shortcut of jQuery() operate earlier than you load the jQuery library like calling $(doc).prepared() operate. “ReferenceError: XXX shouldn’t be outlined” is a regular JavaScript error, which comes once you attempt to entry a variable or operate earlier than declaring it. Since jQuery can also be a JavaScript library, you will need to first embrace the declaration of the jQuery operate or $() earlier than you employ it.

So as to perceive this error extra, let’s examine easy methods to reproduce “Reference Error: $ shouldn’t be outlined” in JavaScript with easy examples of “reference error: jQuery shouldn’t be outlined”

Right here is an instance of Reference Error: not outlined in JavaScript  for each variable and performance:

// accessing operate with out defining it
getCount(); // ReferenceError: getCount is not outlined
getCount = operate(){};
getCount() // No errors

It is clear now that “Uncaught ReferenceError: XX shouldn’t be outlined” comes once you attempt to entry XX, which could possibly be a variable or operate earlier than defining it. 

And, If you wish to be taught Fashionable JavaScript or stage up your abilities then I recommend you be a part of these free JavaScript programs on-line. It is probably the greatest and hands-on programs to be taught ES 6 and different new JavaScript options.

5 Widespread Causes ReferenceError: $ shouldn’t be outlined in jQuery

Having mentioned that, let’s examine some widespread situations or errors which trigger the “Uncaught ReferenceError: $ shouldn’t be outlined” error whereas utilizing jQuery in your mission:

1. Path to your jquery.js file is unsuitable and it can’t be discovered (Error 404).
This downside might be solved by fixing your path to the jquery.js file. In case your mission is a public web site, you higher use Google hosted jQuery information to keep away from such points.

2. jQuery plugin is included earlier than the jQuery file.
You possibly can clear up this downside by together with jquery.js file earlier than any jQuery plugin information.

3. jQuery UI is included earlier than jQuery min library
You can not put the script reference to jquery-ui earlier than the jQuery script itself. That is what mounted the issue to me: first jquery-x.x.x.min.js, then jquery-ui-xxxxxx.js


4.
You might be together with the jQuery file with out the protocol within the URL and accessing the web page out of your native file system. It is a foolish mistake nevertheless it occurs. To resolve this downside simply add HTTP protocol (http:// as an alternative of //) within the URL when you are creating.

Generally this error additionally comes “jQuery not outlined” as proven under:

Fixing ReferenceError: $ is not defined in jQuery - Solution and Tips

5. jQuery file is included from the net, however you do not have an web connection. It’s a foolish mistake, however you’d be stunned how usually it occurs. You possibly can clear up this downside by together with an area jquery.js file copy or hook up with the web 🙂

6.  Incorrect order of script whereas loading a number of JavaScript information
In case you are loading a number of JavaScript information utilizing the script tag, you will need to first load jQuery one. corrected it

That is all concerning the widespread causes for Reference Error: $ shouldn’t be outlined in jQuery. Most certainly your downside must be solved by following the following pointers. If the above instances don’t clear up your case, strive to determine why jQuery shouldn’t be loaded earlier than the road the place this error is thrown.

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Thanks for studying this text up to now. For those who discover this text helpful then please share it with your mates and colleagues. When you have any questions or suggestions then please drop a observe. 

P. S. – If you wish to grow to be an internet developer, you can even see these free net growth programs to search out out which frameworks, libraries, instruments, and applied sciences you want to be taught to grow to be the Internet developer you all the time needed to be.
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