Add suggestions for invalid URLs

src/InvalidUrlViewModel.js

@@ -0,0 +1,25 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+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 {ViewModel} from "./utils/ViewModel.js";
+import {tryFixUrl} from "./Link.js";
+
+export class InvalidUrlViewModel extends ViewModel {
+    constructor(options) {
+        super(options);
+        this.validFixes = tryFixUrl(options.fragment);
+    }
+}