SyntaxError: missing } after property list (Firefox)
SyntaxError: Unexpected identifier 'c'. Expected '}' to end an object literal. (Safari)

There is a mistake in the object initializer syntax somewhere. Might be in fact a missing curly bracket, but could also be a missing comma, for example. Also check if any closing curly braces or parenthesis are in the correct order. Indenting or formatting the code a bit nicer might also help you to see through the jungle.

Oftentimes, there is a missing comma in your object initializer code:

const obj = {
  a: 1,
  b: { myProp: 2 }
  c: 3
};

Correct would be:

const obj = {
  a: 1,
  b: { myProp: 2 },
  c: 3,
};

• Object initializer