---
name: "up.fragment.contains"
area: "API"
kind: "JavaScript function"
parent: "up.fragment module"
visibility: "experimental"
url: "https://unpoly.com/api/up.fragment.contains"
---
<nav aria-label="Unpoly docs">[All docs](https://unpoly.com/index.md) · [up.fragment module](https://unpoly.com/api/up.fragment.md)</nav>

# up.fragment.contains(root, query)

**This feature is experimental**. Please [share](https://github.com/unpoly/unpoly/discussions) your experiences so we know what to keep or change.

Returns whether the given `root` matches or contains the given selector or element.

Will always return `false` if the two elements are on different [layers](https://unpoly.com/api/up.layer.md).

---

## Parameters {#parameters}

### root {#root}

(required)

Type: [Element](https://developer.mozilla.org/en-US/docs/Web/API/Element) | Document

### query {#query}

(required)

The selector or element to look for.

Type: string | [Element](https://developer.mozilla.org/en-US/docs/Web/API/Element)

---

## Return value {#return-value}

Whether the root contains the given element or selector.

Type: boolean