The differences between logical or (||) and nullish coalescing (??) operators

Both operators are used to assign default valuesut they differ in how they determine what is considered a “falsy”.

• Logical or (||): Returns the right-hand if the left-hand operand is falsy (false, 0, '', null, undefined, and NaN).

• Nullish coalescing (??): Returns the right-hand operand if it is not null or undefined.

const a = 0
const b = a || 5 // b will be 5, since 0 is falsy.
const c = a ?? 5 // c will be 0, since 0 is not null or undefined.