From a9a0d47330d1c77591bb38648f8c1ed7fb334df9 Mon Sep 17 00:00:00 2001
From: sarayourfriend <24264157+sarayourfriend@users.noreply.github.com>
Date: Fri, 21 May 2021 09:24:11 -0700
Subject: [PATCH] compose: Add types to `usePrevious` (#31944)

---
 packages/compose/README.md                       | 2 +-
 packages/compose/src/hooks/use-previous/index.js | 4 ++--
 packages/compose/tsconfig.json                   | 1 +
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/packages/compose/README.md b/packages/compose/README.md
index f72dfb4ce9e810..1a46e8fb19bf48 100644
--- a/packages/compose/README.md
+++ b/packages/compose/README.md
@@ -367,7 +367,7 @@ _Parameters_
 
 _Returns_
 
--   `T|undefined`: The value from the previous render.
+-   `T | undefined`: The value from the previous render.
 
 <a name="useReducedMotion" href="#useReducedMotion">#</a> **useReducedMotion**
 
diff --git a/packages/compose/src/hooks/use-previous/index.js b/packages/compose/src/hooks/use-previous/index.js
index 035a272b06953c..c50e392a43226a 100644
--- a/packages/compose/src/hooks/use-previous/index.js
+++ b/packages/compose/src/hooks/use-previous/index.js
@@ -11,14 +11,14 @@ import { useEffect, useRef } from '@wordpress/element';
  *
  * @param {T} value The value to track.
  *
- * @return {T|undefined} The value from the previous render.
+ * @return {T | undefined} The value from the previous render.
  */
 export default function usePrevious( value ) {
 	// Disable reason: without an explicit type detail, the type of ref will be
 	// inferred based on the initial useRef argument, which is undefined.
 	// https://github.com/WordPress/gutenberg/pull/22597#issuecomment-633588366
 	/* eslint-disable jsdoc/no-undefined-types */
-	const ref = useRef( /** @type {T|undefined} */ ( undefined ) );
+	const ref = useRef( /** @type {T | undefined} */ ( undefined ) );
 	/* eslint-enable jsdoc/no-undefined-types */
 
 	// Store current value in ref.
diff --git a/packages/compose/tsconfig.json b/packages/compose/tsconfig.json
index 9544096d8ff048..0b134e049ff11a 100644
--- a/packages/compose/tsconfig.json
+++ b/packages/compose/tsconfig.json
@@ -19,6 +19,7 @@
 		"src/hooks/use-debounce/**/*",
 		"src/hooks/use-instance-id/**/*",
 		"src/hooks/use-focus-return/**/*",
+		"src/hooks/use-previous/**/*",
 		"src/utils/**/*"
 	]
 }