Fixed #191

Used first code snippets from ClearURLs v2: https://gitlab.com/ClearURLs/core/-/blob/master/src/utils/URLHashParams.ts

core_js/utils/URLHashParams.d.ts

@@ -0,0 +1,13 @@
+/**
+ * Models a hash parameter of a given {@link URL}.
+ */
+export default class URLHashParams {
+    private _params;
+    constructor(url: URL);
+    append(name: string, value?: string | null): void;
+    delete(name: string): void;
+    get(name: string): string | null;
+    getAll(name: string): Set<string | null>;
+    keys(): IterableIterator<string>;
+    toString(): string;
+}