| /** | |
| * @license | |
| * Copyright 2022 Google LLC | |
| * SPDX-License-Identifier: Apache-2.0 | |
| */ | |
| /** | |
| * Gets all properties of a Source that match a given Type. For example: | |
| * | |
| * type BooleansOfHTMLElement = PropertiesOfType<HTMLElement, boolean>; | |
| * | |
| * will be 'draggable' | 'autofocus' | etc. | |
| */ | |
| export type PropertiesOfType<Source, Type> = { | |
| [K in keyof Source]: Source[K] extends Type ? K : never; | |
| }[keyof Source]; |