`y, z` is comma operator, no?
On Fri, 26 May 2017 at 08:57, Gareth Heyes <[email protected]>
wrote:
> ```javascript
> class y{}class z{}
> class x extends y, z{}/alert(1)/+alert(2)
> ```
>
> Edge seems to allow non-standard syntax here. I guess to allow you to
> extend multiple classes but as far as I'm aware this is non-standard
> syntax. The code above calls alert(2), if you change it to a class
> expression both alerts are called. It's a syntax error on other browsers.
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