dont emit error when aborting request when stopping sync

src/matrix/hs-api.js

@@ -1,4 +1,7 @@
-import {HomeServerError} from "./error.js";
+import {
+	HomeServerError,
+	RequestAbortError
+} from "./error.js";
 
 class RequestWrapper {
 	constructor(promise, controller) {
@@ -58,6 +61,11 @@ export default class HomeServerApi {
 						throw new HomeServerError(method, url, await response.json())
 				}
 			}
+		}, err => {
+			switch (err.name) {
+				case "AbortError": throw new RequestAbortError();
+				default: throw new Error(`Unrecognized DOMException: ${err.name}`);
+			}
 		});
 		return new RequestWrapper(promise, controller);
 	}

src/matrix/sync.js

@@ -55,9 +55,11 @@ export default class Sync extends EventEmitter {
 				console.log(`starting sync request with since ${syncToken} ...`);
 				syncToken = await this._syncRequest(syncToken, INCREMENTAL_TIMEOUT);
 			} catch (err) {
-				console.warn("stopping sync because of error");
 				this._isSyncing = false;
-				this.emit("error", err);
+				if (!(err instanceof RequestAbortError)) {
+					console.warn("stopping sync because of error");
+					this.emit("error", err);
+				}
 			}
 		}
 		this.emit("stopped");