Determines whether a value is a JavaScript property key.
Property keys are strings, numbers, or symbols. Numbers are accepted because exact property-key arrays preserve
numeric array indexes and ordinary JavaScript property access coerces numeric object keys as usual.
Determines whether a value is a JavaScript property key.
Property keys are strings, numbers, or symbols. Numbers are accepted because exact property-key arrays preserve numeric array indexes and ordinary JavaScript property access coerces numeric object keys as usual.