From 191cc667e17d8ecc3de8d2fabb132bae9f1576f9 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Tue, 20 Apr 2021 12:22:31 +0900
Subject: [PATCH] internal/uidriver/js: Add an error message when
 pointerlockerror happens

Updates #1604
---
 internal/uidriver/js/ui_js.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/internal/uidriver/js/ui_js.go b/internal/uidriver/js/ui_js.go
index 60ef4de06..cb353ac9c 100644
--- a/internal/uidriver/js/ui_js.go
+++ b/internal/uidriver/js/ui_js.go
@@ -396,6 +396,10 @@ func init() {
 		theUI.input.recoverCursorPosition()
 		return nil
 	}))
+	document.Call("addEventListener", "pointerlockerror", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
+		js.Global().Get("console").Call("error", "pointerlockerror event is fired. 'sandbox=\"allow-pointer-lock\"' might be required.")
+		return nil
+	}))
 }
 
 func setWindowEventHandlers(v js.Value) {