full-screen feature

src/js/config-menu.js

@@ -182,6 +182,13 @@ const menuDefinition = [
 						target: 'view/guides.remove'
 					}
 				]
+			},
+			{
+				divider: true
+			},
+			{
+				name: 'Full Screen',
+				target: 'view/full_screen.fs'
 			}
 		]
 	},

src/js/modules/view/full_screen.js

@@ -0,0 +1,20 @@
+class View_fullScreen_class {
+
+	constructor() {}
+
+	/**
+	 * toggle full-screen
+	 */
+	fs() {
+		if (!document.fullscreenElement) {
+			document.documentElement.requestFullscreen();
+		}
+		else {
+			if (document.exitFullscreen) {
+				document.exitFullscreen();
+			}
+		}
+	}
+}
+
+export default View_fullScreen_class;