5-languages-nav-proptypes

Author: tylermcginnis

app/components/Popular.jsx

@@ -1,4 +1,5 @@
 import * as React from "react";
+import PropTypes from "prop-types";
 
 function LanguagesNav({ selected, onUpdateLanguage }) {
   const languages = ["All", "JavaScript", "Ruby", "Java", "CSS", "Python"];
@@ -17,6 +18,11 @@ function LanguagesNav({ selected, onUpdateLanguage }) {
   );
 }
 
+LanguagesNav.propTypes = {
+  selected: PropTypes.string.isRequired,
+  onUpdateLanguage: PropTypes.func.isRequired,
+};
+
 export default class Popular extends React.Component {
   constructor(props) {
     super(props);

package-lock.json

@@ -16,6 +16,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "prop-types": "^15.8.1",
     "react": "^18.2.0",
     "react-dom": "^18.2.0"
   },