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Parameter ↔ Variable pass into function to define Function Signature, imports Arguments & act as local variable

aka Param

!differs vs Argument which only the value itself entering function - and not a name used to define function

!differs vs Argument which is what Parameter will initialize into, if supplied

Parameter Default Value​

JS Syntax used to specify default Value for a Parameter if not provided

References​

  1. function ↔ JS Keyword to Declare function (with optional Argument Parameters)

  2. Argument ↔ Value import as Parameter input to function

  3. Parameter Default Value ↔ JS Syntax used to specify default Value for a Parameter if not provided

  4. Typed Optional Parameter ↔ TS Syntax to mark Identifier as an optional Parameter using ?:

  5. --noImplicitAny ↔ to flag TSC to prevent Type Inference for any - enforce explicit Type for Parameter, Exception, etc

  6. Type Assignment ↔ code to assign Type to Variable/Parameter using :

  7. assert.throws() ↔ assert Static Method to complain if Callback Function Parameter does not throw Exception

  8. "noImplicitAny": true ↔ to throw Exception when any Parameter inferred as any

  9. "noUnusedParameters": true ↔ to warn/throw when function Parameter unused (inside function)

  10. Lazy Initial value ↔ function pass as Parameter into useState(), to assign return value as Initial State value, on first-call only

  11. useToggle() ↔ Custom Hook to flip boolean Param

  12. RangeError ↔ Exception when number || Param outside valid range