diff --git a/app/javascript/shared/polyfills.js b/app/javascript/shared/polyfills.js
index bcf7ce2b4..5998b0158 100644
--- a/app/javascript/shared/polyfills.js
+++ b/app/javascript/shared/polyfills.js
@@ -6,6 +6,8 @@ import 'regenerator-runtime/runtime';
 import 'dom4';
 import 'intersection-observer';
 import 'whatwg-fetch';
+import '@webcomponents/webcomponentsjs';
+import '@stimulus/polyfills';
 
 import './polyfills/insertAdjacentElement';
 import './polyfills/dataset';
diff --git a/package.json b/package.json
index 43e7642ac..b017a54f0 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,9 @@
     "@reach/combobox": "^0.16.5",
     "@reach/slider": "^0.16.0",
     "@sentry/browser": "6.12.0",
+    "@stimulus/polyfills": "^2.0.0",
     "@tmcw/togeojson": "^4.3.0",
+    "@webcomponents/webcomponentsjs": "^2.6.0",
     "babel-plugin-macros": "^2.8.0",
     "chartkick": "^4.1.1",
     "core-js": "^3.6.5",
diff --git a/yarn.lock b/yarn.lock
index f06ec9512..ba0811326 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2263,6 +2263,16 @@
     escape-string-regexp "^2.0.0"
     lodash.deburr "^4.1.0"
 
+"@stimulus/polyfills@^2.0.0":
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/@stimulus/polyfills/-/polyfills-2.0.0.tgz#64b3e247c762330f80d88e993d1d26b24e3c13b1"
+  integrity sha512-XrN0AGSpBg9e7LHcOGjuyKx3a1SIcaNDqQkjMU0dy63NKsqYccjRGCvtBBE2U3NwcCQX3H22kMpeXCERUwl0ag==
+  dependencies:
+    core-js "^3.4.0"
+    element-closest "^2.0.2"
+    eventlistener-polyfill "^1.0.5"
+    mutation-observer-inner-html-shim "^1.0.0"
+
 "@szmarczak/http-timer@^1.1.2":
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/@szmarczak/http-timer/-/http-timer-1.1.2.tgz#b1665e2c461a2cd92f4c1bbf50d5454de0d4b421"
@@ -2830,6 +2840,11 @@
     "@webassemblyjs/wast-parser" "1.9.0"
     "@xtuc/long" "4.2.2"
 
+"@webcomponents/webcomponentsjs@^2.6.0":
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/@webcomponents/webcomponentsjs/-/webcomponentsjs-2.6.0.tgz#7d1674c40bddf0c6dd974c44ffd34512fe7274ff"
+  integrity sha512-Moog+Smx3ORTbWwuPqoclr+uvfLnciVd6wdCaVscHPrxbmQ/IJKm3wbB7hpzJtXWjAq2l/6QMlO85aZiOdtv5Q==
+
 "@xtuc/ieee754@^1.2.0":
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/@xtuc/ieee754/-/ieee754-1.2.0.tgz#eef014a3145ae477a1cbc00cd1e552336dceb790"
@@ -4569,6 +4584,11 @@ core-js@^3.16.2, core-js@^3.6.5:
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.20.0.tgz#1c5ac07986b8d15473ab192e45a2e115a4a95b79"
   integrity sha512-KjbKU7UEfg4YPpskMtMXPhUKn7m/1OdTHTVjy09ScR2LVaoUXe8Jh0UdvN2EKUR6iKTJph52SJP95mAB0MnVLQ==
 
+core-js@^3.4.0:
+  version "3.22.3"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.22.3.tgz#498c41d997654cb00e81c7a54b44f0ab21ab01d5"
+  integrity sha512-1t+2a/d2lppW1gkLXx3pKPVGbBdxXAkqztvWb1EJ8oF8O2gIGiytzflNiFEehYwVK/t2ryUsGBoOFFvNx95mbg==
+
 core-util-is@1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
@@ -5511,6 +5531,11 @@ elegant-spinner@^1.0.1:
   resolved "https://registry.yarnpkg.com/elegant-spinner/-/elegant-spinner-1.0.1.tgz#db043521c95d7e303fd8f345bedc3349cfb0729e"
   integrity sha1-2wQ1IcldfjA/2PNFvtwzSc+wcp4=
 
+element-closest@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/element-closest/-/element-closest-2.0.2.tgz#72a740a107453382e28df9ce5dbb5a8df0f966ec"
+  integrity sha1-cqdAoQdFM4LijfnOXbtajfD5Zuw=
+
 elf-cam@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/elf-cam/-/elf-cam-0.1.1.tgz#46883b10835ed9e417860636a870d57490ce9eda"
@@ -5901,6 +5926,11 @@ eventemitter3@^4.0.0:
   resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-4.0.7.tgz#2de9b68f6528d5644ef5c59526a1b4a07306169f"
   integrity sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw==
 
+eventlistener-polyfill@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/eventlistener-polyfill/-/eventlistener-polyfill-1.0.5.tgz#d3c96e57d52ca4dc30b3b8f3cf9698dc8e277d8a"
+  integrity sha512-xqqTj0eyJWqAMg1U+Sr20Upi86bOlbLfk/cbVnHuTEKh2S59PszLNwsc4miaUwLR7YRnCnxwSkdCZpxdo3MPwA==
+
 events@^3.0.0:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/events/-/events-3.3.0.tgz#31a95ad0a924e2d2c419a813aeb2c4e878ea7400"
@@ -9131,6 +9161,11 @@ mustache@^2.2.1:
   resolved "https://registry.yarnpkg.com/mustache/-/mustache-2.3.2.tgz#a6d4d9c3f91d13359ab889a812954f9230a3d0c5"
   integrity sha512-KpMNwdQsYz3O/SBS1qJ/o3sqUJ5wSb8gb0pul8CO0S56b9Y2ALm8zCfsjPXsqGFfoNBkDwZuZIAjhsZI03gYVQ==
 
+mutation-observer-inner-html-shim@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/mutation-observer-inner-html-shim/-/mutation-observer-inner-html-shim-1.0.1.tgz#84349f51dfc390d0af85011de8fa14e645fb400e"
+  integrity sha512-YmJPDSUWJgBhwqRJP6AMvjdfDHU1gsrT5YdgpxMit2+x1khLYhdYq9fvp4clPsYecVT3JOprBf/KjEX7IqlU+g==
+
 mute-stream@0.0.7:
   version "0.0.7"
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.7.tgz#3075ce93bc21b8fab43e1bc4da7e8115ed1e7bab"