Limitation of spread operator

We can only pass 1 spread operator in a function

Only one spread operator is allowed and that must be the last function ( or occurrence)

Default function
Undefined is weaker and can't replace original values
Null is stronger and can delete original values

Returning in JAVASCRIPT ES6

Function with parameters and return type .....

Function with parameters and return types ( login validation code )

Comparison between named function and anonymous function