How did you explicitly make it into an object literal? ({}) + [] -> "[object Object]" will correctly make it "[object Object]" Did you try to do this

How did you explicitly make it into an object literal? ({}) + [] -> "[object Object]" will correctly make it "[object Object]" Did you try to do this? {a: 1} + [] -> 0 That's interpreted as the statement 1 labeled a, not as an object. This makes it obvious it's not an object: {a: 1, b: 2} + [] -> Uncaught SyntaxError: Unexpected token ':' JavaScript supports labels so you can continue/break multiple levels at once: { a: while (true) while (true) break a; }