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Huh! I did not realize that CSS custom properties had their own resolution behavior for how !important works in their values. Uh, despite writing a guide about them. 😬 But hey it’s now updated.

Stefan Judis documents it clearly. …

JavaScript has a (newish) feature called optional chaining. Say I have code like:

const name = Data.person.name;

If person happens to not exist on Data, I’m going to get a hard, show-stopping error. With optional chaining, I can …