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Comment by pwdisswordfishz | Hacker News Reader

Uncaught TypeError: 'querySelectorAll' called on an object that does not implement interface Document.

Damn, you're right, sorry.

window.$ = (x => document.querySelectorAll(x))

I find this a little cleaner:

    window.$ = document.querySelectorAll.bind(document);

Since it works properly for any function no matter the number of arguments it receives

I like wrapping it in an Array.from() so you can use .map/.filter/etc.