From 402e1a251a27245bace703652c303d8881647029 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 21 Mar 2021 16:40:35 +0900
Subject: [PATCH] internal/uidriver/js: Bug fix: CursorMode didn't work on
 go2cpp

---
 internal/uidriver/js/ui_js.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/internal/uidriver/js/ui_js.go b/internal/uidriver/js/ui_js.go
index d8cfba012..2e77ab18f 100644
--- a/internal/uidriver/js/ui_js.go
+++ b/internal/uidriver/js/ui_js.go
@@ -103,6 +103,10 @@ func (u *UserInterface) IsVsyncEnabled() bool {
 }
 
 func (u *UserInterface) CursorMode() driver.CursorMode {
+	if !canvas.Truthy() {
+		return driver.CursorModeHidden
+	}
+
 	if jsutil.Equal(canvas.Get("style").Get("cursor"), stringNone) {
 		return driver.CursorModeVisible
 	}
@@ -110,6 +114,10 @@ func (u *UserInterface) CursorMode() driver.CursorMode {
 }
 
 func (u *UserInterface) SetCursorMode(mode driver.CursorMode) {
+	if !canvas.Truthy() {
+		return
+	}
+
 	var visible bool
 	switch mode {
 	case driver.CursorModeVisible: