update required libraries.

package.json

@@ -4,37 +4,37 @@
   "private": true,
   "dependencies": {
     "@types/async-lock": "^1.1.1",
-    "@types/jest": "24.0.18",
+    "@types/jest": "24.0.22",
     "@types/lokijs": "^1.5.2",
-    "@types/node": "12.7.2",
-    "@types/react": "16.9.2",
-    "@types/react-dom": "16.9.0",
-    "@types/react-helmet": "^5.0.9",
+    "@types/node": "12.12.6",
+    "@types/react": "16.9.11",
+    "@types/react-dom": "16.9.3",
+    "@types/react-helmet": "^5.0.14",
     "@types/react-html-parser": "^2.0.1",
     "@types/react-overlays": "^1.1.3",
-    "@types/react-router-dom": "^4.3.5",
+    "@types/react-router-dom": "^5.1.2",
     "@types/react-router-hash-link": "^1.2.1",
     "@types/xregexp": "^3.0.30",
     "async-lock": "^1.2.2",
     "axios": "^0.19.0",
-    "lokijs": "^1.5.7",
+    "lokijs": "^1.5.8",
     "moment": "^2.24.0",
-    "rc-tree": "^3.0.0-alpha.15",
-    "react": "^16.9.0",
-    "react-app-polyfill": "^1.0.2",
+    "rc-tree": "3.0.0-alpha.37",
+    "react": "^16.11.0",
+    "react-app-polyfill": "^1.0.4",
     "react-cookie": "^4.0.1",
-    "react-dom": "^16.9.0",
-    "react-ga": "^2.6.0",
+    "react-dom": "^16.11.0",
+    "react-ga": "^2.7.0",
     "react-helmet": "^5.2.1",
     "react-html-parser": "^2.0.2",
     "react-image-lightbox": "^5.1.0",
     "react-overlays": "^1.2.0",
-    "react-router-dom": "^5.0.1",
+    "react-router-dom": "^5.1.2",
     "react-router-hash-link": "^1.2.2",
-    "react-scripts": "3.1.1",
+    "react-scripts": "3.2.0",
     "react-spinner-material": "^1.1.3",
     "react-twitter-widgets": "^1.7.1",
-    "typescript": "3.5.3",
+    "typescript": "3.7.2",
     "xregexp": "^4.2.4"
   },
   "scripts": {

src/database/blocks/IndexTree.tsx

@@ -1,6 +1,6 @@
 import Tree from 'rc-tree';
-import { DataNode, NodeInstance } from 'rc-tree/lib/interface';
-import React, { Component } from 'react';
+import { DataNode, EventDataNode } from 'rc-tree/lib/interface';
+import React, { Component, ReactText } from 'react';
 import { RouteComponentProps, withRouter } from 'react-router';
 import { MultiLang } from '../../config';
 import Functions from '../../functions';
@@ -67,7 +67,8 @@ class IndexTree extends Component<Props, State> {
     }
 
     componentDidUpdate(prevProps: Props, prevState: State) {
-        if (prevProps.lang !== this.props.lang) {
+        const { lang } = this.props;
+        if (prevProps.lang !== lang) {
             const res = this.load();
             this.setState({
                 tree: res.elements,
@@ -84,8 +85,8 @@ class IndexTree extends Component<Props, State> {
         this.setState({ expandedKeys: [] })
     }
 
-    handleExpand(expandedKeys: (string | number)[], info: {
-        node: NodeInstance;
+    handleExpand(expandedKeys: ReactText[], info: {
+        node: EventDataNode;
         expanded: boolean;
         nativeEvent: MouseEvent;
     }): void {
@@ -95,10 +96,10 @@ class IndexTree extends Component<Props, State> {
         this.setState({ expandedKeys: keys });
     }
 
-    handleSelect(selectedKeys: (string | number)[], info: {
+    handleSelect(selectedKeys: ReactText[], info: {
         event: 'select';
         selected: boolean;
-        node: NodeInstance;
+        node: EventDataNode;
         selectedNodes: DataNode[];
         nativeEvent: MouseEvent;
     }): void {

src/index.tsx

@@ -4,11 +4,11 @@ import React from 'react';
 import ReactDOM from 'react-dom';
 import './index.css';
 import App from './App';
-import * as serviceWorker from './serviceWorker';
+// import * as serviceWorker from './serviceWorker';
 
 ReactDOM.render(<App />, document.getElementById('root'));
 
 // If you want your app to work offline and load faster, you can change
 // unregister() to register() below. Note this comes with some pitfalls.
 // Learn more about service workers: https://bit.ly/CRA-PWA
-serviceWorker.unregister();
+// serviceWorker.unregister();