> You can't expect every website on the internet to test on every old version of every browser that any old device might be stuck on. No, you don't have to. Al

> You can't expect every website on the internet to test on every old version of every browser that any old device might be stuck on. No, you don't have to. All you have to do is not use modern features without transpilation and expect them to work for everyone. babel + browserlist with sane defaults would have prevented the issue described in the post.