diff --git a/src/observable/map/LogMap.js b/src/observable/map/LogMap.js
deleted file mode 100644
index 1beb4846..00000000
--- a/src/observable/map/LogMap.js
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
-Copyright 2020 Bruno Windels <bruno@windels.cloud>
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import {BaseObservableMap} from "./BaseObservableMap";
-
-export class LogMap extends BaseObservableMap {
-    constructor(source, log) {
-        super();
-        this._source = source;
-        this.log = log;
-        this._subscription = null;
-    }
-
-    onAdd(key, value) {
-        this.log("add", key, value);
-        this.emitAdd(key, value);
-    }
-
-    onRemove(key, value) {
-        this.log("remove", key, value);
-        this.emitRemove(key, value);
-    }
-
-    onUpdate(key, value, params) {
-        this.log("update", key, value, params);
-        this.emitUpdate(key, value, params);
-    }
-
-    onSubscribeFirst() {
-        this.log("subscribeFirst");
-        this._subscription = this._source.subscribe(this);
-        super.onSubscribeFirst();
-    }
-
-    onUnsubscribeLast() {
-        super.onUnsubscribeLast();
-        this._subscription = this._subscription();
-        this.log("unsubscribeLast");
-    }
-
-    onReset() {
-        this.log("reset");
-        this.emitReset();
-    }
-
-    [Symbol.iterator]() {
-        return this._source[Symbol.iterator]();
-    }
-
-    get size() {
-        return this._source.size;
-    }
-
-    get(key) {
-        return this._source.get(key);
-    }
-}
diff --git a/src/observable/map/LogMap.ts b/src/observable/map/LogMap.ts
new file mode 100644
index 00000000..988aa71b
--- /dev/null
+++ b/src/observable/map/LogMap.ts
@@ -0,0 +1,104 @@
+/*
+Copyright 2020 Bruno Windels <bruno@windels.cloud>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {BaseObservableMap, BaseObservableMapConfig} from "./BaseObservableMap";
+import {config} from "./config";
+import {FilteredMap} from "./FilteredMap.js";
+import {MappedMap} from "./MappedMap.js";
+import {JoinedMap} from "./JoinedMap.js";
+import {SortedMapList} from "../list/SortedMapList.js";
+import {SubscriptionHandle} from "../BaseObservable"
+import {ILogItem, LabelOrValues} from "../../logging/types";
+import {LogLevel} from "../../logging/LogFilter";
+
+export class LogMap<K, V> extends BaseObservableMap<K, V> {
+    private _source: BaseObservableMap<K, V>;
+    private _subscription?: SubscriptionHandle;
+    private _log: ILogItem;
+    private _config: BaseObservableMapConfig<K, V>
+
+
+    constructor(source: BaseObservableMap<K, V>, log: ILogItem) {
+        super();
+        this._source = source;
+        this._log = log;
+        this._config = config<K, V>();
+    }
+
+    join(...otherMaps: Array<typeof this>): JoinedMap<K, V> {
+        return this._config.join(this, ...otherMaps);
+    }
+
+    mapValues(mapper: any, updater?: (params: any) => void): MappedMap {
+        return this._config.mapValues(this, mapper, updater);
+    }
+
+    sortValues(comparator?: (a: any, b: any) => number): SortedMapList {
+        return this._config.sortValues(this, comparator);
+    }
+
+    filterValues(filter: (v: V, k: K) => boolean): FilteredMap<K, V> {
+        return this._config.filterValues(this, filter);
+    }
+
+    private log(labelOrValues: LabelOrValues, logLevel?: LogLevel): ILogItem {
+        return this._log.log(labelOrValues, logLevel);
+    }
+
+    onAdd(key: K, value: V) {
+        this.log("add " + JSON.stringify({key, value}));
+        this.emitAdd(key, value);
+    }
+
+    onRemove(key: K, value: V) {
+        this.log("remove " + JSON.stringify({key, value}));
+        this.emitRemove(key, value);
+    }
+
+    onUpdate(key: K, value: V, params: any) {
+        this.log("update" + JSON.stringify({key, value, params}));
+        this.emitUpdate(key, value, params);
+    }
+
+    onSubscribeFirst() {
+        this.log("subscribeFirst");
+        this._subscription = this._source.subscribe(this);
+        super.onSubscribeFirst();
+    }
+
+    onUnsubscribeLast() {
+        super.onUnsubscribeLast();
+        if (this._subscription) this._subscription = this._subscription();
+        this.log("unsubscribeLast");
+    }
+
+    onReset() {
+        this.log("reset");
+        this.emitReset();
+    }
+
+    [Symbol.iterator]() {
+        return this._source[Symbol.iterator]();
+    }
+
+    get size() {
+        return this._source.size;
+    }
+
+    get(key: K) {
+        return this._source.get(key);
+    }
+}