Fix types for getWorksheet() (#2223)

hfhchan-plb · Siemienik · web-flow · commit a081694d283a · 2023-04-13T15:53:54.000+02:00
## Summary Fix types for getWorksheet(). It can return undefined ## Test plan N/A ## Related to source code (for typings update) [lib/doc/workbook.js#L143](https://github.com/exceljs/exceljs/blob/master/lib/doc/workbook.js#L143) --------- Co-authored-by: Siemienik Pawel <hi@siemienik.com>
diff --git a/index.d.ts b/index.d.ts
@@ -1743,7 +1743,7 @@ export class Workbook {
 	/**
 	 * fetch sheet by name or id
 	 */
-	getWorksheet(indexOrName: number | string): Worksheet;
+	getWorksheet(indexOrName?: number | string): Worksheet | undefined;
 
 	/**
 	 * Iterate over all sheets.
