3️⃣6️⃣
❌ Wrong type inference for number comparing to literals.

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3️⃣7️⃣
❌ Wrong union assignment.

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3️⃣8️⃣
❌ Type guard narrowing type loss after reassignment.

▶️ Playground

3️⃣9️⃣
❌ Dangerous usage of spread operator.

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4️⃣0️⃣
❌ Incorrect type narrowing for

let value: <union type> = ...

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▶️ More real-world example and solution