| /* This Source Code Form is subject to the terms of the Mozilla Public | |
| * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| * file, You can obtain one at https://mozilla.org/MPL/2.0/. */ | |
| // https://dom.spec.whatwg.org/#nonelementparentnode | |
| interface mixin NonElementParentNode { | |
| [Pure] | |
| Element? getElementById(DOMString elementId); | |
| }; |