The error "javascript runtime error $ is undefined" typically occurs when you are trying to use the $ symbol in a JavaScript script, but the script cannot find a definition for it. This can happen for a number of reasons, but the most common cause is that you are trying to use the $ symbol without including the necessary library or framework that defines it.
To fix this error, you will need to make sure that the library or framework that defines the $ symbol is properly included in your script.
Here are a few common causes of the "javascript runtime error $ is undefined" error and how to fix them:
- You are trying to use the
$symbol in a script that does not have access to the jQuery library.
To fix this, you will need to include the jQuery library in your script by adding a <script> tag to your HTML file that points to the jQuery library file:
Copy code<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
Once you have included the jQuery library in your script, you should be able to use the $ symbol as normal.
- You are trying to use the
$symbol in a script that does not have access to the AngularJS library.
To fix this, you will need to include the AngularJS library in your script by adding a <script> tag to your HTML file that points to the AngularJS library file:
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.7.9/angular.min.js"></script>
Once you have included the AngularJS library in your script, you should be able to use the $ symbol as normal.
- You are trying to use the
$symbol in a script that does not have access to the Prototype library.
To fix this, you will need to include the Prototype library in your script by adding a <script> tag to your HTML file that points to the Prototype library file:
<script src="https://ajax.googleapis.com/ajax/libs/prototype/1.7.3.0/prototype.js"></script>
Once you have included the Prototype library in your script, you should be able to use the $ symbol as normal.
If you are still encountering the "javascript runtime error $ is undefined" error after including the necessary library or framework, it is possible that there is a problem with the library file itself, or with the way it is being included in your script. In this case, you may need to troubleshoot the issue further by checking the library file for errors, or by trying a different version of the library.
What are most common javascript run time errors?
JavaScript runtime errors are errors that occur when a JavaScript script is executed. They can be caused by a variety of issues, such as syntax errors, undefined variables, and missing or incorrect function arguments.
Here are some common JavaScript runtime errors:
Uncaught ReferenceError: [variable or function] is not defined
This error occurs when you try to use a variable or function that has not been defined in your script. To fix this error, you will need to make sure that the variable or function has been properly defined before you try to use it.
Uncaught TypeError: [object or function] is not a function
This error occurs when you try to call a function or method on an object that does not have a function with the specified name. To fix this error, you will need to make sure that the object has a function with the correct name, or that you are calling the function on the correct object.
Uncaught SyntaxError: Unexpected token [token]
This error occurs when the JavaScript interpreter encounters an unexpected token, such as a missing or extra brace, parenthesis, or semicolon. To fix this error, you will need to carefully review your code and make sure that all tokens are correctly placed.
Uncaught RangeError: Maximum call stack size exceeded
This error occurs when a function calls itself recursively (i.e., calls itself as part of its own execution) and the call stack becomes too large. To fix this error, you will need to make sure that your function is not calling itself unnecessarily, or increase the maximum call stack size if necessary.
Uncaught URIError: URI too long
This error occurs when a URI (Uniform Resource Identifier) is too long to be processed by the JavaScript interpreter. To fix this error, you will need to make sure that your URIs are not too long, or use a different method for handling long URIs.
These are just a few examples of common JavaScript runtime errors. There are many other types of runtime errors that can occur, depending on the specific context in which the error occurs