hasObjectPrototype

hasObjectPrototype(value): boolean

Defined in: packages/core/src/guards/has-object-prototype.ts:26

Check whether a value’s own prototype is Object.prototype or null.

Strictly narrower than isPojo, which follows the whole prototype chain and so also accepts Object.create({}). Both ask “is this a data bag”; this one refuses a bag that inherits from another bag.

Reach for it when the answer decides how a value is rebuilt rather than how it is read — a traversal that rewrites a node into a fresh {}, a serializer choosing between an object form and a tagged form. Inherited keys are lost by such a rebuild, so a chain-following test would claim a fidelity the output does not have. When you only mean to read own keys, isPojo is the more forgiving question; see isObject for the whole family.

Parameters

value

object

The object to check.

Returns

boolean

True if nothing sits between the value and Object.prototype.

Example

  hasObjectPrototype({}); // true
  hasObjectPrototype(Object.create(null)); // true
  hasObjectPrototype(Object.create({})); // false
  hasObjectPrototype(new Date()); // false
  ```;