JS: Browser Console SyntaxError: Unexpected token :

By Xah Lee. Date: 2016-10-27. Last updated: 2023-01-09.

Uncaught SyntaxError: Unexpected token

One common error when using console is that when you type this:

{"x":3, "y":4};

and you get an error:

Uncaught SyntaxError: Unexpected token

It's a quirk in the JavaScript language. It thinks you are using a code block, not object.

solution is to wrap the object by parenthesis, like this:

({"x":3, "y":4})

In Google Chrome, omitting the semicolon also works. (but not in Firefox as of 2016-10-27)

{"x":3, "y":4}