ECMAScript Language Types Uv Ecmascript 2017 Language Specification

6.1 ECMAScript Language Types

An ECMAScript Language Type corresponds to values that are directly manipulated by an ECMAScript programmer using the ECMAScript Language. The ECMAScript language types are Undefined, Null, Boolean, String, Symbol, Number, and Object. An ECMAScript language value is a value that is characterized by an ECMAScript language type.