From 1dc8a7e479fa4092052ea81d32a1354a35742b01 Mon Sep 17 00:00:00 2001
From: Aaron Robertshaw <60436221+aaronrobertshaw@users.noreply.github.com>
Date: Thu, 17 Jun 2021 18:38:36 +1000
Subject: [PATCH] Prevent empty string values for longhand border radii

---
 .../src/components/border-radius-control/input-controls.js   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/block-editor/src/components/border-radius-control/input-controls.js b/packages/block-editor/src/components/border-radius-control/input-controls.js
index 74fb62db361925..45c5117a2a0440 100644
--- a/packages/block-editor/src/components/border-radius-control/input-controls.js
+++ b/packages/block-editor/src/components/border-radius-control/input-controls.js
@@ -14,7 +14,10 @@ export default function BoxInputControls( {
 	...props
 } ) {
 	const createHandleOnChange = ( corner ) => ( next ) => {
-		onChange( { ...values, [ corner ]: next } );
+		onChange( {
+			...values,
+			[ corner ]: next ? next : undefined,
+		} );
 	};
 
 	// For backwards compatibility, handle possible flat string value.