Working with JavaScript means working with undefined. It’s a standard way to say, “This thing you asked for doesn’t exist.” Thinking about it all the time tends to break brains, though — and not thinking about it introduces bugs.
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How to Deal with Optional Things and "Undefined" in TypeScript
Working with JavaScript means working with undefined. It’s a standard way to say, “This thing you asked for doesn’t exist.” Thinking about it all the time tends to break brains, though — and not thinking about it introduces bugs.
Full article