types.isBoxedPrimitive - node__util.d.ts - Node

function types.isBoxedPrimitive

Usage in Deno

```typescript import { types } from "node:node__util.d.ts"; ```



isBoxedPrimitive(object: unknown): object is String
 | Number
 | BigInt
 | Boolean
 | Symbol

Returns `true` if the value is any boxed primitive object, e.g. created by `new Boolean()`, `new String()` or `Object(Symbol())`. For example: ```js util.types.isBoxedPrimitive(false); // Returns false util.types.isBoxedPrimitive(new Boolean(false)); // Returns true util.types.isBoxedPrimitive(Symbol('foo')); // Returns false util.types.isBoxedPrimitive(Object(Symbol('foo'))); // Returns true util.types.isBoxedPrimitive(Object(BigInt(5))); // Returns true ```

Parameters



object: unknown

Return Type

object is String
 | Number
 | BigInt
 | Boolean
 | Symbol