From 0c51aa70decf476bb81a4f2f95e76f777636e2f8 Mon Sep 17 00:00:00 2001
From: Th0rN13 <th0r@inbox.ru>
Date: Mon, 4 May 2020 10:23:32 +0500
Subject: [PATCH] Add force uncheck values for dublicate bind:group

---
 src/runtime/internal/dom.ts | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
index bf8fc1f5a0..7e2b6de9e0 100644
--- a/src/runtime/internal/dom.ts
+++ b/src/runtime/internal/dom.ts
@@ -124,12 +124,23 @@ export function xlink_attr(node, attribute, value) {
 	node.setAttributeNS('http://www.w3.org/1999/xlink', attribute, value);
 }
 
+let oldValue: Set<unknown> = new Set();
+
 export function get_binding_group_value(group) {
-	const value = [];
+	const value = new Set();
+	const force = [];
 	for (let i = 0; i < group.length; i += 1) {
-		if (group[i].checked) value.push(group[i].__value);
+		if (group[i].checked) {
+			value.add(group[i].__value);
+		} else if (oldValue.has(group[i].__value)) {
+			force.push(group[i].__value);
+		}
+	}
+	for (let i = 0; i < force.length; i += 1) {
+		value.delete(force[i]);
 	}
-	return value;
+	oldValue = value;
+	return Array.from(value);
 }
 
 export function to_number(value) {