Ignore unexpected WebSocket disconnection errors silently

src/client-store.js

@@ -28,8 +28,12 @@ module.exports = function createClientStore(options = {}) {
 					let data = JSON.stringify(message);
 					this.socket.send(data, (error) => {
 						if (error != null) {
+							if (error.message === "not opened") {
+								/* The socket has disappeared. We can safely ignore this. Is there a more reliable way to detect this error than by its message, though? */
+							} else {
 								store.emit("error", error);
 							}
+						}
 					});
 				}
 			});