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JavaScript error reference

Below, you'll find a list of errors which are thrown by JavaScript. These errors can be a helpful debugging aid, but the reported problem isn't always immediately clear. The pages below will provide additional details about these errors. Each error is an object based upon the {{jsxref("Error")}} object, and has a name and a message.

Errors displayed in the Web console may include a link to the corresponding page below to help you quickly comprehend the problem in your code.

For a beginner's introductory tutorial on fixing JavaScript errors, see What went wrong? Troubleshooting JavaScript.

List of errors​

In this list, each page is listed by name (the type of error) and message (a more detailed human-readable error message). Together, these two properties provide a starting point toward understanding and resolving the error. For more information, follow the links below!

{{ListSubPages("/Web/JavaScript/Reference/Errors")}}