From 35feaab6aed2b359e5c520f036d9dcf6f7d9dff6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20B=C5=82a=C5=BCejewicz=20=28Peter=20Blazejewicz=29?=
 <peterblazejewicz@users.noreply.github.com>
Date: Fri, 3 Jan 2020 21:50:19 +0100
Subject: [PATCH] fix(truncate-middle): null union type for `str` (#41277)

This fixes empty string return when param equals `null`:
https://git.io/JeNkz

Thanks!
---
 types/truncate-middle/index.d.ts               | 2 +-
 types/truncate-middle/truncate-middle-tests.ts | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/types/truncate-middle/index.d.ts b/types/truncate-middle/index.d.ts
index ec4f3e52e7..9758d4435c 100644
--- a/types/truncate-middle/index.d.ts
+++ b/types/truncate-middle/index.d.ts
@@ -3,6 +3,6 @@
 // Definitions by: Gary King <https://github.com/garyking>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-declare function truncateMiddle(text: string, frontLength?: number, backLength?: number, ellipsis?: string): string;
+declare function truncateMiddle(text: string | null, frontLength?: number, backLength?: number, ellipsis?: string): string;
 
 export = truncateMiddle;
diff --git a/types/truncate-middle/truncate-middle-tests.ts b/types/truncate-middle/truncate-middle-tests.ts
index 9bb60ee7d1..eb1b28a776 100644
--- a/types/truncate-middle/truncate-middle-tests.ts
+++ b/types/truncate-middle/truncate-middle-tests.ts
@@ -7,3 +7,5 @@ truncateMiddle('text', 1);
 truncateMiddle('text', 1, 2);
 
 truncateMiddle('text', 1, 2, '...');
+
+truncateMiddle(null);