Meaning of safe navigation operator | Babel Free

Definitions

A binary operator that returns its second argument, unless the first argument is null, in which case it returns null; used to simplify code that would otherwise need multiple explicit checks for nullity.

Examples

“One operator I haven't talked about yet is the safe navigation operator (?.). By preceding a dot with a question⟳ mark⟳, you can safely navigate⟳ to methods or properties of an object even if that object is null.”

“The safe navigation operator (?.) provides navigation on the nested properties without getting any exception when a null value is evaluated from any of the properties iterated.”

“C# 6 introduced a cascading nulls operator, also called the null-conditional operator and the safe navigation operator.”

CEFR level