All unusable, will not work on Internet Explorer.
I'm responding here to spectators, because of course Mr. De Backer already knows that polyfills enable support down to IE11.
So, in fact you can write web components that work in ie11.
However, that doesn't mean that you should.
(((Benny Powers))) ๐ฎ๐ฑ๐จ๐ฆ @powersbenny ie11 support is NOT๐ซ "nice to have"๐ซ "a feature"๐ซ "A business requirement". ie11 support is willful disregard of๐โโ๏ธ your users', ๐ฐ your customers',๐ or your client's securityStop supporting ie. ๐๐๐Let it die.mashable.com/article/internโฆ 15:05 PM - 25 Sep 2019 18 36
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All unusable, will not work on Internet Explorer.
I'm responding here to spectators, because of course Mr. De Backer already knows that polyfills enable support down to IE11.
So, in fact you can write web components that work in ie11.
However, that doesn't mean that you should.