diff --git a/packages/warning/CHANGELOG.md b/packages/warning/CHANGELOG.md
index cfc8338f86c59..c26fb1ea5d4ba 100644
--- a/packages/warning/CHANGELOG.md
+++ b/packages/warning/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Internal
+
+-   Refactor to TypeScript ([#62557](https://github.com/WordPress/gutenberg/pull/62557)).
+
 ## 3.0.0 (2024-05-31)
 
 ### Breaking Changes
@@ -147,3 +151,4 @@
 ## 1.0.0 (2020-02-04)
 
 Initial release.
+
diff --git a/packages/warning/src/index.js b/packages/warning/src/index.ts
similarity index 86%
rename from packages/warning/src/index.js
rename to packages/warning/src/index.ts
index 5744e99d94fd2..a5a092abbd212 100644
--- a/packages/warning/src/index.js
+++ b/packages/warning/src/index.ts
@@ -3,7 +3,7 @@
  */
 import { logged } from './utils';
 
-function isDev() {
+function isDev(): boolean {
 	// eslint-disable-next-line @wordpress/wp-global-usage
 	return globalThis.SCRIPT_DEBUG === true;
 }
@@ -11,7 +11,7 @@ function isDev() {
 /**
  * Shows a warning with `message` if environment is not `production`.
  *
- * @param {string} message Message to show in the warning.
+ * @param message Message to show in the warning.
  *
  * @example
  * ```js
@@ -25,7 +25,7 @@ function isDev() {
  * }
  * ```
  */
-export default function warning( message ) {
+export default function warning( message: string ): void {
 	if ( ! isDev() ) {
 		return;
 	}
@@ -46,6 +46,5 @@ export default function warning( message ) {
 	} catch ( x ) {
 		// Do nothing.
 	}
-
 	logged.add( message );
 }
diff --git a/packages/warning/src/utils.js b/packages/warning/src/utils.ts
similarity index 66%
rename from packages/warning/src/utils.js
rename to packages/warning/src/utils.ts
index fb087255f6bf6..4f4b5d3e1f797 100644
--- a/packages/warning/src/utils.js
+++ b/packages/warning/src/utils.ts
@@ -1,7 +1,5 @@
 /**
  * Object map tracking messages which have been logged, for use in ensuring a
  * message is only logged once.
- *
- * @type {Set<string>}
  */
-export const logged = new Set();
+export const logged: Set< string > = new Set();