diff --git a/learning-resources-react/package-lock.json b/learning-resources-react/package-lock.json
index 9dbfa1d..ad7768d 100644
--- a/learning-resources-react/package-lock.json
+++ b/learning-resources-react/package-lock.json
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@@ -6186,6 +6450,11 @@
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@@ -7561,6 +7830,92 @@
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+    "jss": {
+      "version": "10.5.1",
+      "resolved": "https://registry.npmjs.org/jss/-/jss-10.5.1.tgz",
+      "integrity": "sha512-hbbO3+FOTqVdd7ZUoTiwpHzKXIo5vGpMNbuXH1a0wubRSWLWSBvwvaq4CiHH/U42CmjOnp6lVNNs/l+Z7ZdDmg==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "csstype": "^3.0.2",
+        "indefinite-observable": "^2.0.1",
+        "is-in-browser": "^1.1.3",
+        "tiny-warning": "^1.0.2"
+      },
+      "dependencies": {
+        "csstype": {
+          "version": "3.0.7",
+          "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.0.7.tgz",
+          "integrity": "sha512-KxnUB0ZMlnUWCsx2Z8MUsr6qV6ja1w9ArPErJaJaF8a5SOWoHLIszeCTKGRGRgtLgYrs1E8CHkNSP1VZTTPc9g=="
+        }
+      }
+    },
+    "jss-plugin-camel-case": {
+      "version": "10.5.1",
+      "resolved": "https://registry.npmjs.org/jss-plugin-camel-case/-/jss-plugin-camel-case-10.5.1.tgz",
+      "integrity": "sha512-9+oymA7wPtswm+zxVti1qiowC5q7bRdCJNORtns2JUj/QHp2QPXYwSNRD8+D2Cy3/CEMtdJzlNnt5aXmpS6NAg==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "hyphenate-style-name": "^1.0.3",
+        "jss": "10.5.1"
+      }
+    },
+    "jss-plugin-default-unit": {
+      "version": "10.5.1",
+      "resolved": "https://registry.npmjs.org/jss-plugin-default-unit/-/jss-plugin-default-unit-10.5.1.tgz",
+      "integrity": "sha512-D48hJBc9Tj3PusvlillHW8Fz0y/QqA7MNmTYDQaSB/7mTrCZjt7AVRROExoOHEtd2qIYKOYJW3Jc2agnvsXRlQ==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "jss": "10.5.1"
+      }
+    },
+    "jss-plugin-global": {
+      "version": "10.5.1",
+      "resolved": "https://registry.npmjs.org/jss-plugin-global/-/jss-plugin-global-10.5.1.tgz",
+      "integrity": "sha512-jX4XpNgoaB8yPWw/gA1aPXJEoX0LNpvsROPvxlnYe+SE0JOhuvF7mA6dCkgpXBxfTWKJsno7cDSCgzHTocRjCQ==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "jss": "10.5.1"
+      }
+    },
+    "jss-plugin-nested": {
+      "version": "10.5.1",
+      "resolved": "https://registry.npmjs.org/jss-plugin-nested/-/jss-plugin-nested-10.5.1.tgz",
+      "integrity": "sha512-xXkWKOCljuwHNjSYcXrCxBnjd8eJp90KVFW1rlhvKKRXnEKVD6vdKXYezk2a89uKAHckSvBvBoDGsfZrldWqqQ==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "jss": "10.5.1",
+        "tiny-warning": "^1.0.2"
+      }
+    },
+    "jss-plugin-props-sort": {
+      "version": "10.5.1",
+      "resolved": "https://registry.npmjs.org/jss-plugin-props-sort/-/jss-plugin-props-sort-10.5.1.tgz",
+      "integrity": "sha512-t+2vcevNmMg4U/jAuxlfjKt46D/jHzCPEjsjLRj/J56CvP7Iy03scsUP58Iw8mVnaV36xAUZH2CmAmAdo8994g==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "jss": "10.5.1"
+      }
+    },
+    "jss-plugin-rule-value-function": {
+      "version": "10.5.1",
+      "resolved": "https://registry.npmjs.org/jss-plugin-rule-value-function/-/jss-plugin-rule-value-function-10.5.1.tgz",
+      "integrity": "sha512-3gjrSxsy4ka/lGQsTDY8oYYtkt2esBvQiceGBB4PykXxHoGRz14tbCK31Zc6DHEnIeqsjMUGbq+wEly5UViStQ==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "jss": "10.5.1",
+        "tiny-warning": "^1.0.2"
+      }
+    },
+    "jss-plugin-vendor-prefixer": {
+      "version": "10.5.1",
+      "resolved": "https://registry.npmjs.org/jss-plugin-vendor-prefixer/-/jss-plugin-vendor-prefixer-10.5.1.tgz",
+      "integrity": "sha512-cLkH6RaPZWHa1TqSfd2vszNNgxT1W0omlSjAd6hCFHp3KIocSrW21gaHjlMU26JpTHwkc+tJTCQOmE/O1A4FKQ==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "css-vendor": "^2.0.8",
+        "jss": "10.5.1"
+      }
+    },
     "jsx-ast-utils": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/jsx-ast-utils/-/jsx-ast-utils-2.1.0.tgz",
@@ -8851,6 +9206,11 @@
         "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 +10482,32 @@
         "workbox-webpack-plugin": "4.2.0"
       }
     },
+    "react-transition-group": {
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/react-transition-group/-/react-transition-group-4.4.1.tgz",
+      "integrity": "sha512-Djqr7OQ2aPUiYurhPalTrVy9ddmFCCzwhqQmtN+J3+3DzLO209Fdr70QrN8Z3DsglWql6iY1lDWAfpFiBtuKGw==",
+      "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": "7.13.10",
+          "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.13.10.tgz",
+          "integrity": "sha512-4QPkjJq6Ns3V/RgpEahRk+AGfL0eO6RHHtTWoNNr5mO49G6B5+X6d6THgWEAvTrznU5xYpbAlVKRYcsCgh/Akw==",
+          "requires": {
+            "regenerator-runtime": "^0.13.4"
+          }
+        },
+        "regenerator-runtime": {
+          "version": "0.13.7",
+          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.7.tgz",
+          "integrity": "sha512-a54FxoJDIr27pgf7IgeQGxmqUNYrcV338lf/6gH456HZ/PhX+5BcwHXG9ajESmwe6WRO0tAzRUrRmNONWgkrew=="
+        }
+      }
+    },
     "read-pkg": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-3.0.0.tgz",
@@ -11415,6 +11801,11 @@
         "util.promisify": "~1.0.0"
       }
     },
+    "symbol-observable": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/symbol-observable/-/symbol-observable-1.2.0.tgz",
+      "integrity": "sha512-e900nM8RRtGhlV36KGEU9k65K3mPb1WV70OdjfxlG2EAuM1noi/E/BaW/uMhL7bPEssK8QV57vN3esixjUvcXQ=="
+    },
     "symbol-tree": {
       "version": "3.2.4",
       "resolved": "https://registry.npmjs.org/symbol-tree/-/symbol-tree-3.2.4.tgz",
@@ -11553,6 +11944,11 @@
       "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",
diff --git a/learning-resources-react/yarn.lock b/learning-resources-react/yarn.lock
index 38721ea..dade3d5 100644
--- a/learning-resources-react/yarn.lock
+++ b/learning-resources-react/yarn.lock
@@ -2124,10 +2124,10 @@ bluebird@^3.5.3:
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.5.tgz#a8d0afd73251effbbd5fe384a77d73003c17a71f"
   integrity sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w==
 
-bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.4.0:
-  version "4.11.8"
-  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.8.tgz#2cde09eb5ee341f484746bb0309b3253b1b1442f"
-  integrity sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==
+bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.11.9:
+  version "4.12.0"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
+  integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
 
 body-parser@1.19.0:
   version "1.19.0"
@@ -2186,7 +2186,7 @@ braces@^2.3.1, braces@^2.3.2:
     split-string "^3.0.2"
     to-regex "^3.0.1"
 
-brorand@^1.0.1:
+brorand@^1.0.1, brorand@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
   integrity sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=
@@ -3498,17 +3498,17 @@ electron-to-chromium@^1.3.122, electron-to-chromium@^1.3.150:
   integrity sha512-i8cuS1zf7TW2t/NrfiaF8amTggCH4yLRe7Pirdf6gVDESP146jXO9NXttM8bJk1aupwA1NVMoaikBSbnTHgZGA==
 
 elliptic@^6.0.0:
-  version "6.4.1"
-  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.4.1.tgz#c2d0b7776911b86722c632c3c06c60f2f819939a"
-  integrity sha512-BsXLz5sqX8OHcsh7CqBMztyXARmGQ3LWPtGjJi6DiJHq5C/qvi9P3OqgswKSDftbu8+IoI/QDTAm2fFnQ9SZSQ==
+  version "6.5.4"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.4.tgz#da37cebd31e79a1367e941b592ed1fbebd58abbb"
+  integrity sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==
   dependencies:
-    bn.js "^4.4.0"
-    brorand "^1.0.1"
+    bn.js "^4.11.9"
+    brorand "^1.1.0"
     hash.js "^1.0.0"
-    hmac-drbg "^1.0.0"
-    inherits "^2.0.1"
-    minimalistic-assert "^1.0.0"
-    minimalistic-crypto-utils "^1.0.0"
+    hmac-drbg "^1.0.1"
+    inherits "^2.0.4"
+    minimalistic-assert "^1.0.1"
+    minimalistic-crypto-utils "^1.0.1"
 
 emoji-regex@^7.0.1, emoji-regex@^7.0.2:
   version "7.0.3"
@@ -4564,7 +4564,7 @@ hex-color-regex@^1.1.0:
   resolved "https://registry.yarnpkg.com/hex-color-regex/-/hex-color-regex-1.1.0.tgz#4c06fccb4602fe2602b3c93df82d7e7dbf1a8a8e"
   integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
 
-hmac-drbg@^1.0.0:
+hmac-drbg@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
   integrity sha1-0nRXAQJabHdabFRXk+1QL8DGSaE=
@@ -4842,16 +4842,21 @@ inflight@^1.0.4:
     once "^1.3.0"
     wrappy "1"
 
-inherits@2, inherits@2.0.3, inherits@^2.0.1, inherits@^2.0.3, inherits@~2.0.1, inherits@~2.0.3:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
-  integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
+inherits@2, inherits@^2.0.1, inherits@^2.0.3, inherits@^2.0.4, inherits@~2.0.1, inherits@~2.0.3:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
+  integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
 
 inherits@2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.1.tgz#b17d08d326b4423e568eff719f91b0b1cbdf69f1"
   integrity sha1-sX0I0ya0Qj5Wjv9xn5GwscvfafE=
 
+inherits@2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+  integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
+
 ini@^1.3.5, ini@~1.3.0:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
@@ -6317,7 +6322,7 @@ minimalistic-assert@^1.0.0, minimalistic-assert@^1.0.1:
   resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz#2e194de044626d4a10e7f7fbc00ce73e83e4d5c7"
   integrity sha512-UtJcAD4yEaGtjPezWuO9wC4nwUnVH/8/Im3yEHQP4b67cXlD/Qr9hdITCU1xDbSEXg2XKNaP8jsReV7vQd00/A==
 
-minimalistic-crypto-utils@^1.0.0, minimalistic-crypto-utils@^1.0.1:
+minimalistic-crypto-utils@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz#f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a"
   integrity sha1-9sAMHAsIIkblxNmd+4x8CDsrWCo=