Meaning of javascript error

Question

Function("(")() //Uncaught SyntaxError: Unexpected token }
Function("{")() //Uncaught SyntaxError: Unexpected token )

Why does a different symbol give an error?
I understand that the code is incorrect, but why is this error?

<supplement>
Function("+")() , Function("~")() , Function("1+")() //Uncaught SyntaxError: Unexpected token }
Function("}+{")() //Uncaught SyntaxError: Single function literal required

Answer 1

Assuming I understand your question correctly, I will attempt to explain.

Function("1")()

doesn't give an error because you correctly define a function prior to it executing. Putting + instead of 1 ends up with an invalid function body of {+} so it complains on seeing the } as it was expecting a valid statement in the function body. Your "}+{" ends up with {}+{} as your code yielding an error at the + after correctly finishing the function.

Answer 2

Thank you for answering my question.