logical operator | web.dev

⟩ ⟩ ⟩ ⟩ logical ⟩

a && b ：returns a if a is falsy, otherwise returns b.
a || b：returns a if a is truthy, otherwise returns b.
a ?? b：returns a if a is , otherwise returns b.
!a：returns false if a is truthy, otherwise returns true.

table of operators

&& and || can do short-circuiting.
unlike && and ||, ! always returns true or false.

any value to Boolean.

!!x    // conversion: any -> true/false

replit：

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