TypeScript Strict Mode Type Errors

1. Accessing properties on potentially null/undefined values
2. Implicit any types due to missing type annotations
3. Function parameters without type annotations
4. Assigning wrong type to variable
5. Not handling null check before access

Add type annotations and null checks:

// Before - strict error
const value = getData();
const name = value.name; // Error: value might be null

// After
const value: User | null = getData();
if (value) {
  const name = value.name; // OK
}

Or use optional chaining:

const name = value?.name;