Skip to main content

Explore your training options in 10 minutes

Error: Unexpected end of input

Christina Kopecky - September 27, 2020

Uncaught SyntaxError: Unexpected end of input .

I know this very error has kept me up at night sometimes. Don’t sweat it! This article will talk about ways to help you debug your code so you can conquer this error and move on with your project.

What does it mean?

More likely than not, it means you have mismatching brackets or quotes somewhere in your code. Ultimately, it is because the V8 engine is parsing your code in a certain way and is looking for a particular character.

Get offers and scholarships from top coding schools illustration

Find Your Bootcamp Match

  • Career Karma matches you with top tech bootcamps
  • Access exclusive scholarships and prep courses

By continuing you agree to our Terms of Service and Privacy Policy , and you consent to receive offers and opportunities from Career Karma by telephone, text message, and email.

If the error gives you a line and char number, that’s a good place to start hunting. If not at that point, backtrack in your code until you find it.

How can I find it?

There are a couple of things you can do to help find syntax bugs in your code:

  1. Make sure everything is indented correctly. An extension like Prettier or Beautify can help in this regard. However, if you have an error in your syntax, the extension won’t run or will work incorrectly. Indentation makes your code more readable, even if it’s not necessarily required to run in a language like JavaScript.
  2. Use the dropdown arrows on the left hand side of your editor to hide elements. If your elements have matching opening and closing brackets, the block will collapse. Here’s an example:

Without clicking dropdowns:

With clicking dropdowns:

This will take attention away from the elements you don’t need to concentrate on, and bring attention to places that might not have matching brackets. If you are not able to collapse it properly, there is more than likely a syntax error in that block of code.

The more you perform code review or the more you encounter this error, the faster you will get at spotting these types of errors! Good luck debugging!

About us: Career Karma is a platform designed to help job seekers find, research, and connect with job training programs to advance their careers. Learn about the CK publication.

What's Next?

Christina Kopecky

About the author: Christina is an experienced technical writer, covering topics as diverse as Java, SQL, Python, and web development. She earned her Master of Music in flute performance from the University of Kansas and a bachelor's degree in music with minors in French and mass communication from Southeast Missouri State. Prior to joining the Career Karma team in June 2020, Christina was a teaching assistant, team lead, and section lead at Lambda School, where she led student groups, performed code and project reviews, and debugged problems for students. Christina's technical content is featured frequently in publications like Codecademy,, and Educative.

Skip to main content