isPrimitive

Tests for one of the Primitive types using the JavaScript typeof operator

Clarification: TypeScript overloads this operator to produce TypeScript types if used in context of types.

@example

const consumer = (value: Primitive | Primitive[]) => {
      if (isPrimitive(value)) {
          return console.log('Primitive value: ', value);
      }
      // type of value now inferred as Primitive[]
      value.map((primitive) => consumer(primitive));
  };

const isPrimitive: (val: unknown) => val is Primitive;