3️⃣0️⃣
❌ Assign non-nullable type {} to non-primitive object.

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3️⃣1️⃣
❌ Incrementing literal type in for loop.

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3️⃣2️⃣
❌ Wrong type inference with Capitalize and Uncapitalize utility types.

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3️⃣3️⃣
❌ Something wrong with type inference or Promise.then typings.

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✅ Solution

3️⃣4️⃣
❌ Weird incorrect autocompletion.

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3️⃣5️⃣
❌ Partial type spreading error.

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✅ Solution

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.

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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