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by masklinn 1768 days ago
> caniuse.com reports [0] 96% support for ES6 classes.

Class fields are later addition to classes. And completely unnecessary here, it looks. The class fields are just duplicates of the instance fields, which are always filled.

> The other 4% is divided between Internet Explorer, Opera Mini and obsolete versions of every other browser. So I'm trying to figure out what kind of people are using such ancient technology and why?

Unsupported device which can not have recent updates for one reason or an other?