[strict[ ScreenCaptureButton

Summary: _typescript_

Reviewed By: jknoxville

Differential Revision: D17282357

fbshipit-source-id: 6ddd912978faa30195f59971f19d29d3ea79342b

src/utils/screenshot.tsx

@@ -11,7 +11,10 @@ import fs from 'fs';
  * Writes a buffer to a specified file path.
  * Returns a Promise which resolves to the file path.
  */
-export const writeBufferToFile = (filePath: string, buffer: Buffer) => {
+export const writeBufferToFile = (
+  filePath: string,
+  buffer: Buffer,
+): Promise<string> => {
   return new Promise((resolve, reject) => {
     fs.writeFile(filePath, buffer, err => {
       if (err) {