diff --git a/learning-resources-react/package-lock.json b/learning-resources-react/package-lock.json
index 9dbfa1d..b652dee 100644
--- a/learning-resources-react/package-lock.json
+++ b/learning-resources-react/package-lock.json
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+    "jss-plugin-rule-value-function": {
+      "version": "10.3.0",
+      "resolved": "https://registry.npmjs.org/jss-plugin-rule-value-function/-/jss-plugin-rule-value-function-10.3.0.tgz",
+      "integrity": "sha512-7WiMrKIHH3rwxTuJki9+7nY11r1UXqaUZRhHvqTD4/ZE+SVhvtD5Tx21ivNxotwUSleucA/8boX+NF21oXzr5Q==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "jss": "^10.3.0",
+        "tiny-warning": "^1.0.2"
+      }
+    },
+    "jss-plugin-vendor-prefixer": {
+      "version": "10.3.0",
+      "resolved": "https://registry.npmjs.org/jss-plugin-vendor-prefixer/-/jss-plugin-vendor-prefixer-10.3.0.tgz",
+      "integrity": "sha512-sZQbrcZyP5V0ADjCLwUA1spVWoaZvM7XZ+2fSeieZFBj31cRsnV7X70FFDerMHeiHAXKWzYek+67nMDjhrZAVQ==",
+      "requires": {
+        "@babel/runtime": "^7.3.1",
+        "css-vendor": "^2.0.8",
+        "jss": "^10.3.0"
+      }
+    },
     "jsx-ast-utils": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/jsx-ast-utils/-/jsx-ast-utils-2.1.0.tgz",
@@ -8851,6 +9160,11 @@
         "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 +10436,32 @@
         "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": "7.10.5",
+          "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.10.5.tgz",
+          "integrity": "sha512-otddXKhdNn7d0ptoFRHtMLa8LqDxLYwTjB4nYgM1yy5N6gU/MUf8zqyyLltCH3yAVitBzmwK4us+DD0l/MauAg==",
+          "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",
@@ -11553,6 +11893,11 @@
       "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..1252f09 100644
--- a/learning-resources-react/yarn.lock
+++ b/learning-resources-react/yarn.lock
@@ -2125,9 +2125,9 @@ bluebird@^3.5.3:
   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==
+  version "4.11.9"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.9.tgz#26d556829458f9d1e81fc48952493d0ba3507828"
+  integrity sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw==
 
 body-parser@1.19.0:
   version "1.19.0"
@@ -3498,9 +3498,9 @@ 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 "6.5.3"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.3.tgz#cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6"
+  integrity sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==
   dependencies:
     bn.js "^4.4.0"
     brorand "^1.0.1"
@@ -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@~2.0.1, 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"