nonObject

function nonObject<T>(value: T | object): value is T;

nonObject(value) is the same test as !isObject(value), written so that a guard clause reads as a sentence rather than as a negation.

The test is typeof value === "object" with null excluded, so arrays, dates and class instances all count, while a function does not. isObjectLike is the one that also accepts functions.

isX and nonX answer a question and never interrupt control flow; requireX and requireNonX hand the value back or throw. The scheme is explained in Validation conventions.

Parameters

Parameter	Type	Description
`value`	`T \\| object`	The value to check.

Returns

boolean — true when the value is not an object; otherwise false.

In TypeScript the guard narrows value to T inside the branch.

Examples

What passes and what does not

nonObject(null); // => true
nonObject("abc"); // => true
nonObject(function () {}); // => true
nonObject({}); // => false
nonObject([]); // => false
nonObject(new Date()); // => false

Source

src/lang/base/nonObject.ts

23 September 2026

This documentation was generated with AI (Claude) from the library's source code.

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