Add propTypes and defaultProps to ItemTableAppBar

src/components/ItemTableAppBar/ItemTableAppBar.js

@@ -1,4 +1,5 @@
 import React from "react";
+import PropTypes from 'prop-types'
 import {makeStyles, Tooltip, Typography, AppBar, Toolbar, IconButton, Zoom} from "@material-ui/core"
 import DarkModeIcon from '@material-ui/icons/Brightness4';
 import LightModeIcon from '@material-ui/icons/Brightness7';
@@ -39,4 +40,17 @@ export default function ItemTableAppBar(props){
 			</AppBar>
 		</>
 	);
-}
+};
+
+ItemTableAppBar.propTypes = {
+	/** The title of the app bar. */
+	"title": PropTypes.string,
+	/** Function to toggle darkMode. */
+	"setDarkMode": PropTypes.func.isRequired,
+	/** State variable for darkMode */
+	"darkMode": PropTypes.bool.isRequired
+};
+
+ItemTableAppBar.defaultProps = {
+	"title": ""
+};