Does JavaScript Have Safe Navigation Operator?

JavaScript Safe Navigation Operator

The safe navigation operator is simply another name for the optional chaining operator (?.), which was introduced in ES11. It evaluates an expression from left-to-right; when/if the left operand evaluates to a nullish value, it stops the execution of the entire chain and short-circuit evaluates the expression to undefined. This helps avoid having the need to add sequential explicit null-safe checks.

It has the following syntax:

obj.value?.prop
obj.value?.[expr]
obj.array?.[index]
obj.function?.(args)

In JavaScript, you can use optional chaining with:

  • Object properties and methods;
  • Expressions;
  • Arrays;
  • Function calls.

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