Unexpected token, expected "," (174:4)

This is a syntax error that occurs when the parser encounters an unexpected token and expects a comma instead. The error message indicates the line number and the position where the error occurred.

For example, if you have the following code:

const myArray = [1 2 3];

You will get the error message:

SyntaxError: Unexpected token, expected "," (1:11)

This is because there are no commas separating the elements of the array. To fix the error, you need to add commas:

const myArray = [1, 2, 3];