1 files changed, 12 insertions, 16 deletions

diff --git a/src/client/util/History.ts b/src/client/util/History.ts
index 0d0c056a4..9728e3177 100644
--- a/src/client/util/History.ts
+++ b/src/client/util/History.ts
@@ -1,10 +1,6 @@
 /* eslint-disable no-use-before-define */
 /* eslint-disable no-empty */
-/* eslint-disable no-continue */
-/* eslint-disable guard-for-in */
-/* eslint-disable no-restricted-syntax */
 /* eslint-disable no-param-reassign */
-import * as qs from 'query-string';
 import { Doc } from '../../fields/Doc';
 import { OmitKeys, ClientUtils } from '../../ClientUtils';
 import { DocServer } from '../DocServer';
@@ -82,7 +78,7 @@ export namespace HistoryUtil {
     //     }
     // }
 
-    const parsers: { [type: string]: (pathname: string[], opts: qs.ParsedQuery) => ParsedUrl | undefined } = {};
+    const parsers: { [type: string]: (pathname: string[], opts: URLSearchParams) => ParsedUrl | undefined } = {};
     const stringifiers: { [type: string]: (state: ParsedUrl) => string } = {};
 
     type ParserValue = true | 'none' | 'json' | ((value: string) => string | null | (string | null)[]);
@@ -91,8 +87,8 @@ export namespace HistoryUtil {
         [key: string]: ParserValue;
     };
 
-    function addParser(type: string, requiredFields: Parser, optionalFields: Parser, customParser?: (pathname: string[], opts: qs.ParsedQuery, current: ParsedUrl) => ParsedUrl | null | undefined) {
-        function parse(parser: ParserValue, value: string | (string | null)[] | null | undefined) {
+    function addParser(type: string, requiredFields: Parser, optionalFields: Parser, customParser?: (pathname: string[], opts: URLSearchParams, current: ParsedUrl) => ParsedUrl | null | undefined) {
+        function parseValue(parser: ParserValue, value: string | (string | null)[] | null | undefined) {
             if (value === undefined || value === null) {
                 return value;
             }
@@ -108,21 +104,21 @@ export namespace HistoryUtil {
         parsers[type] = (pathname, opts) => {
             const current: DocUrl & { [key: string]: null | (string | null)[] | string } = { type: 'doc', docId: '' };
             for (const required in requiredFields) {
-                if (!(required in opts)) {
+                if (!opts.has(required)) {
                     return undefined;
                 }
                 const parser = requiredFields[required];
-                const value = parse(parser, opts[required]);
+                const value = parseValue(parser, opts.get(required));
                 if (value !== null && value !== undefined) {
                     current[required] = value;
                 }
             }
             for (const opt in optionalFields) {
-                if (!(opt in opts)) {
+                if (!opts.has(opt)) {
                     continue;
                 }
                 const parser = optionalFields[opt];
-                const value = parse(parser, opts[opt]);
+                const value = parseValue(parser, opts.get(opt));
                 if (value !== undefined) {
                     current[opt] = value;
                 }
@@ -148,12 +144,12 @@ export namespace HistoryUtil {
                 path = customStringifier(state, path);
             }
             const queryObj = OmitKeys(state, keys).extract;
-            const query: { [key: string]: string | null } = {};
+            const query = new URLSearchParams();
             Object.keys(queryObj).forEach(key => {
-                query[key] = queryObj[key] === null ? null : JSON.stringify(queryObj[key]);
+                query.set(key, queryObj[key] === null ? '' : JSON.stringify(queryObj[key]));
             });
-            const queryString = qs.stringify(query);
-            return path + (queryString ? `?${queryString}` : '');
+            const qstr = query.toString();
+            return path + (qstr ? `?${qstr}` : '');
         };
     }
 
@@ -170,7 +166,7 @@ export namespace HistoryUtil {
     export function parseUrl(location: Location | URL): ParsedUrl | undefined {
         const pathname = location.pathname.substring(1);
         const { search } = location;
-        const opts = search.length ? qs.parse(search, { sort: false }) : {};
+        const opts = new URLSearchParams(search);
         const pathnameSplit = pathname.split('/');
 
         const type = pathnameSplit[0];