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Strict Mode

Intermediate~18 min

Strict mode enables all strict type-checking options for maximum type safety and error prevention.

Strict Mode

Output 
Click Run to execute your code
Strict Flags:
  • noImplicitAny - No implicit any types
  • strictNullChecks - Null/undefined checking
  • strictFunctionTypes - Function type checking
  • strictPropertyInitialization - Class property init
Best Practice: Always enable strict mode for new projects. It catches bugs early.

Summary

  • Strict mode enables all strict checks
  • Prevents common errors
  • Required for production code
  • Enable from project start
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