{}.toString() now throws SyntaxError in browser, what happened?

[hermit99]

Regarding 1-js/09-classes/06-instanceof, now Edge/Chrome browsers don't like this syntax anymore, and throws Uncaught SyntaxError: Unexpected token '.'

Now we have to write ({}).toString(). In Node.js {}.toString() still works. Was there a change in the spec recently or it's actually a bug in brower?

[sagarpanchal]

#3323