diff --git a/learning-resources-react/package-lock.json b/learning-resources-react/package-lock.json
index 9dbfa1d..7f00985 100644
--- a/learning-resources-react/package-lock.json
+++ b/learning-resources-react/package-lock.json
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+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "jss": "10.9.0",
+        "tiny-warning": "^1.0.2"
+      }
+    },
+    "jss-plugin-props-sort": {
+      "version": "10.9.0",
+      "resolved": "https://registry.npmjs.org/jss-plugin-props-sort/-/jss-plugin-props-sort-10.9.0.tgz",
+      "integrity": "sha512-7A76HI8bzwqrsMOJTWKx/uD5v+U8piLnp5bvru7g/3ZEQOu1+PjHvv7bFdNO3DwNPC9oM0a//KwIJsIcDCjDzw==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "jss": "10.9.0"
+      }
+    },
+    "jss-plugin-rule-value-function": {
+      "version": "10.9.0",
+      "resolved": "https://registry.npmjs.org/jss-plugin-rule-value-function/-/jss-plugin-rule-value-function-10.9.0.tgz",
+      "integrity": "sha512-IHJv6YrEf8pRzkY207cPmdbBstBaE+z8pazhPShfz0tZSDtRdQua5jjg6NMz3IbTasVx9FdnmptxPqSWL5tyJg==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "jss": "10.9.0",
+        "tiny-warning": "^1.0.2"
+      }
+    },
+    "jss-plugin-vendor-prefixer": {
+      "version": "10.9.0",
+      "resolved": "https://registry.npmjs.org/jss-plugin-vendor-prefixer/-/jss-plugin-vendor-prefixer-10.9.0.tgz",
+      "integrity": "sha512-MbvsaXP7iiVdYVSEoi+blrW+AYnTDvHTW6I6zqi7JcwXdc6I9Kbm234nEblayhF38EftoenbM+5218pidmC5gA==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "css-vendor": "^2.0.8",
+        "jss": "10.9.0"
+      }
+    },
     "jsx-ast-utils": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/jsx-ast-utils/-/jsx-ast-utils-2.1.0.tgz",
@@ -8851,6 +9185,11 @@
         "ts-pnp": "^1.0.0"
       }
     },
+    "popper.js": {
+      "version": "1.16.1-lts",
+      "resolved": "https://registry.npmjs.org/popper.js/-/popper.js-1.16.1-lts.tgz",
+      "integrity": "sha512-Kjw8nKRl1m+VrSFCoVGPph93W/qrSO7ZkqPpTf7F4bk/sqcfWK019dWBUpE/fBOsOQY1dks/Bmcbfn1heM/IsA=="
+    },
     "portfinder": {
       "version": "1.0.20",
       "resolved": "https://registry.npmjs.org/portfinder/-/portfinder-1.0.20.tgz",
@@ -10122,6 +10461,32 @@
         "workbox-webpack-plugin": "4.2.0"
       }
     },
+    "react-transition-group": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/react-transition-group/-/react-transition-group-4.4.2.tgz",
+      "integrity": "sha512-/RNYfRAMlZwDSr6z4zNKV6xu53/e2BuaBbGhbyYIXTrmgu/bGHzmqOs7mJSJBHy9Ud+ApHx3QjrkKSp1pxvlFg==",
+      "requires": {
+        "@babel/runtime": "^7.5.5",
+        "dom-helpers": "^5.0.1",
+        "loose-envify": "^1.4.0",
+        "prop-types": "^15.6.2"
+      },
+      "dependencies": {
+        "@babel/runtime": {
+          "version": "7.17.2",
+          "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.17.2.tgz",
+          "integrity": "sha512-hzeyJyMA1YGdJTuWU0e/j4wKXrU4OMFvY2MSlaI9B7VQb0r5cxTE3EAIS2Q7Tn2RIcDkRvTA/v2JsAEhxe99uw==",
+          "requires": {
+            "regenerator-runtime": "^0.13.4"
+          }
+        },
+        "regenerator-runtime": {
+          "version": "0.13.9",
+          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.9.tgz",
+          "integrity": "sha512-p3VT+cOEgxFsRRA9X4lkI1E+k2/CtnKtU4gcxyaCUreilL/vqI6CdZ3wxVUx3UOUg+gnUOQQcRI7BmSI656MYA=="
+        }
+      }
+    },
     "read-pkg": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-3.0.0.tgz",
@@ -11553,6 +11918,11 @@
       "resolved": "https://registry.npmjs.org/timsort/-/timsort-0.3.0.tgz",
       "integrity": "sha1-QFQRqOfmM5/mTbmiNN4R3DHgK9Q="
     },
+    "tiny-warning": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/tiny-warning/-/tiny-warning-1.0.3.tgz",
+      "integrity": "sha512-lBN9zLN/oAf68o3zNXYrdCt1kP8WsiGW8Oo2ka41b2IM5JL/S1CTyX1rW0mb/zSuJun0ZUrDxx4sqvYS2FWzPA=="
+    },
     "tmp": {
       "version": "0.0.33",
       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",
@@ -11931,9 +12301,9 @@
       }
     },
     "url-parse": {
-      "version": "1.4.7",
-      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.4.7.tgz",
-      "integrity": "sha512-d3uaVyzDB9tQoSXFvuSUNFibTd9zxd2bkVrDRvF5TmvWWQwqE4lgYJ5m+x1DbecWkw+LK4RNl2CU1hHuOKPVlg==",
+      "version": "1.5.7",
+      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.5.7.tgz",
+      "integrity": "sha512-HxWkieX+STA38EDk7CE9MEryFeHCKzgagxlGvsdS7WBImq9Mk+PGwiT56w82WI3aicwJA8REp42Cxo98c8FZMA==",
       "requires": {
         "querystringify": "^2.1.1",
         "requires-port": "^1.0.0"
diff --git a/learning-resources-react/yarn.lock b/learning-resources-react/yarn.lock
index 38721ea..3f4bbcc 100644
--- a/learning-resources-react/yarn.lock
+++ b/learning-resources-react/yarn.lock
@@ -8015,9 +8015,9 @@ querystring@0.2.0:
   integrity sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA=
 
 querystringify@^2.1.1:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/querystringify/-/querystringify-2.1.1.tgz#60e5a5fd64a7f8bfa4d2ab2ed6fdf4c85bad154e"
-  integrity sha512-w7fLxIRCRT7U8Qu53jQnJyPkYZIaR4n5151KMfcJlO/A9397Wxb1amJvROTK6TOnp7PfoAmg/qXiNHI+08jRfA==
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/querystringify/-/querystringify-2.2.0.tgz#3345941b4153cb9d082d8eee4cda2016a9aef7f6"
+  integrity sha512-FIqgj2EUvTa7R50u0rGsyTftzjYmv/a3hO345bZNrqabNqjtgiDMgmo4mkUjd+nzU5oF3dClKqFIPUKybUyqoQ==
 
 raf@3.4.1:
   version "3.4.1"
@@ -9690,9 +9690,9 @@ url-loader@1.1.2:
     schema-utils "^1.0.0"
 
 url-parse@^1.4.3:
-  version "1.4.7"
-  resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.4.7.tgz#a8a83535e8c00a316e403a5db4ac1b9b853ae278"
-  integrity sha512-d3uaVyzDB9tQoSXFvuSUNFibTd9zxd2bkVrDRvF5TmvWWQwqE4lgYJ5m+x1DbecWkw+LK4RNl2CU1hHuOKPVlg==
+  version "1.5.7"
+  resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.5.7.tgz#00780f60dbdae90181f51ed85fb24109422c932a"
+  integrity sha512-HxWkieX+STA38EDk7CE9MEryFeHCKzgagxlGvsdS7WBImq9Mk+PGwiT56w82WI3aicwJA8REp42Cxo98c8FZMA==
   dependencies:
     querystringify "^2.1.1"
     requires-port "^1.0.0"