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tsc --strict ↔ to flag TSC auto-set max strictness settings, apply true to: --noImplicitAny, --noImplicitThis, --alwaysStrict, --strictNullChecks, --strictFunctionTypes, --strictPropertyInitialization

--noImplicitAny​

to flag TSC to prevent Type Inference for any - enforce explicit Type for Parameter, Exception, etc

--noImplicitThis​

to flag TSC to throw error when Type of this keyword unclear

--alwaysStrict​

to flag TSC to apply Strict Mode

--strictNullChecks​

to flag TSC to throw error when null is not explicitly defined

--strictFunctionTypes​

to flag TSC to enforce stronger checks for function Types

--strictPropertyInitialization​

flag to set TSC to throw error when properties in class definitions are not initialized

References​