Скачать или смотреть How to Fix the Uncaught SyntaxError: Unexpected token 'var' in JavaScript

Struggling with a `Uncaught SyntaxError` in your JavaScript? Learn how to properly structure your code to avoid this error and keep your project running smoothly.
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This video is based on the question https://stackoverflow.com/q/67934891/ asked by the user 'willivfx' ( https://stackoverflow.com/u/12864516/ ) and on the answer https://stackoverflow.com/a/67934971/ provided by the user 'Amit Verma' ( https://stackoverflow.com/u/14229027/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Uncaught SyntaxError: Unexpected token 'var' Error in JavaScript

If you're diving into JavaScript for a school project or personal coding journey, you might encounter some frustrating errors along the way. One such error that commonly trips up beginners is the Uncaught SyntaxError: Unexpected token 'var'. In this guide, we'll explore what causes this error and how to resolve it effectively.

What Causes the Error?

The Uncaught SyntaxError: Unexpected token 'var' indicates that the JavaScript engine is encountering a syntax issue in your code where it doesn't expect to. In your case, the error arises due to incorrect placement of code within the function.

Here's the problematic code snippet you shared:

[[See Video to Reveal this Text or Code Snippet]]

Key Issues

Missing curly braces: The function declaration lacks curly braces to properly define the body of the function.

Code structure: The statements should be enclosed within the function for them to execute properly when invoking the function.

Here’s the Corrected Version

To resolve this syntax issue, let's refactor your code properly. The following example illustrates how to structure it correctly:

[[See Video to Reveal this Text or Code Snippet]]

What Changed?

Added Curly Braces: The function body is now properly enclosed with curly braces {}.

Consistent Code Formatting: Maintaining a uniform structure not only helps in avoiding errors but also makes your code more readable and maintainable.

Conclusion

JavaScript can seem tricky at first, especially with syntax errors that can stall your progress. By understanding how to properly structure your code, you can avoid common issues such as the Uncaught SyntaxError: Unexpected token 'var'. Always remember to use curly braces to define function boundaries and ensure that all statements are correctly placed within your functions.

Happy coding, and don't hesitate to ask for help when you're stuck!