From fc47d6ec26558af8d9c51feeb9a966e904f7d56c Mon Sep 17 00:00:00 2001
From: Sebastian Seedorf <sebastian.seedorf@biotronik.com>
Date: Sun, 15 Nov 2020 00:18:23 +0100
Subject: [PATCH] Added polyfill

---
 package-lock.json               | 808 ++++++++++++++++++++++++++++++--
 package.json                    |   4 +
 public/js-source/tsconfig.json  |   2 +-
 src/app.ts                      |   3 +-
 src/utils/helpers/resolvable.ts |   2 +-
 src/utils/index.ts              |   1 +
 src/utils/logging.ts            |   3 +-
 src/utils/polyfill-worker.ts    |  25 +
 src/utils/polyfill.ts           |  35 ++
 src/utils/types/polyfill.d.ts   |  37 ++
 views/layout.pug                |   1 +
 11 files changed, 887 insertions(+), 34 deletions(-)
 create mode 100644 src/utils/polyfill-worker.ts
 create mode 100644 src/utils/polyfill.ts
 create mode 100644 src/utils/types/polyfill.d.ts

diff --git a/package-lock.json b/package-lock.json
index 44046d5..bb24b07 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,22 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@10xjs/polyfill-analyzer": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/@10xjs/polyfill-analyzer/-/polyfill-analyzer-0.1.0.tgz",
+      "integrity": "sha512-YXat4YGDaC6gRjPv4lwQlwlPMptjb1CEpLmh7depqtW1gd716HCQ/2BsD/2f4u/IVh48JFzMPB5fUV2WeucUKA==",
+      "requires": {
+        "ts-morph": "^7.0.0",
+        "typescript": "^3.8.3"
+      },
+      "dependencies": {
+        "typescript": {
+          "version": "3.9.7",
+          "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.7.tgz",
+          "integrity": "sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw=="
+        }
+      }
+    },
     "@babel/code-frame": {
       "version": "7.10.4",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.10.4.tgz",
@@ -85,6 +101,15 @@
         "kuler": "^2.0.0"
       }
     },
+    "@dsherret/to-absolute-glob": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@dsherret/to-absolute-glob/-/to-absolute-glob-2.0.2.tgz",
+      "integrity": "sha1-H2R13IvZdM6gei2vOGSzF7HdMyw=",
+      "requires": {
+        "is-absolute": "^1.0.0",
+        "is-negated-glob": "^1.0.0"
+      }
+    },
     "@eslint/eslintrc": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.2.1.tgz",
@@ -120,11 +145,163 @@
         }
       }
     },
+    "@financial-times/polyfill-useragent-normaliser": {
+      "version": "1.9.0",
+      "resolved": "https://registry.npmjs.org/@financial-times/polyfill-useragent-normaliser/-/polyfill-useragent-normaliser-1.9.0.tgz",
+      "integrity": "sha512-jrVQ42tT1RrWyR/hkJlro2HhHZMPGXknKfJyZabe0CYj1c1KIqdS1JhhXEOt0T9ntaRCYq56y2/hAMM6LOU73g==",
+      "requires": {
+        "@financial-times/useragent_parser": "^1.5.1",
+        "semver": "^7.1.1"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "7.3.2",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.2.tgz",
+          "integrity": "sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ=="
+        }
+      }
+    },
+    "@financial-times/useragent_parser": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/@financial-times/useragent_parser/-/useragent_parser-1.5.1.tgz",
+      "integrity": "sha512-g6MJ5tVszip1wAOq41yk8Z0WJqjfpu3hKaos/IaechYC4RqIn8bTanNR/EGD6oeOdJ9/fTPbQQX5/3ZQwSTXtQ=="
+    },
+    "@formatjs/ecma402-abstract": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/@formatjs/ecma402-abstract/-/ecma402-abstract-1.4.0.tgz",
+      "integrity": "sha512-Mv027hcLFjE45K8UJ8PjRpdDGfR0aManEFj1KzoN8zXNveHGEygpZGfFf/FTTMl+QEVSrPAUlyxaCApvmv47AQ==",
+      "requires": {
+        "tslib": "^2.0.1"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.3.tgz",
+          "integrity": "sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ=="
+        }
+      }
+    },
+    "@formatjs/intl-datetimeformat": {
+      "version": "2.7.1",
+      "resolved": "https://registry.npmjs.org/@formatjs/intl-datetimeformat/-/intl-datetimeformat-2.7.1.tgz",
+      "integrity": "sha512-MLGcznXv348Ywfw7WYVjaJn9ZBT7Tau6+ri1ta/1/ovl2NJosjroTqqMRD6flpIt8cURFNSQWM/izng6Zzs4JA==",
+      "requires": {
+        "@formatjs/ecma402-abstract": "^1.2.6",
+        "tslib": "^2.0.1"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.3.tgz",
+          "integrity": "sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ=="
+        }
+      }
+    },
+    "@formatjs/intl-displaynames": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/@formatjs/intl-displaynames/-/intl-displaynames-3.4.1.tgz",
+      "integrity": "sha512-bStuATYAecjxMNVv9TOBLiTK90F7jTbVioiZCrbNt97zbBoShYwddLMdgczGMeyvy/bwJ7NBXY1+5bg1vKUVvA==",
+      "requires": {
+        "@formatjs/ecma402-abstract": "^1.2.6",
+        "tslib": "^2.0.1"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.3.tgz",
+          "integrity": "sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ=="
+        }
+      }
+    },
+    "@formatjs/intl-getcanonicallocales": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/@formatjs/intl-getcanonicallocales/-/intl-getcanonicallocales-1.5.1.tgz",
+      "integrity": "sha512-APDuvYkJJ9jdZue4gpeqy1qw4n06JDIKjtMfQBsmAwgssOIs3LRlKymbnLlhVFeZ1kjYXi61A7IdEkQpeLHTdA==",
+      "requires": {
+        "cldr-core": "37.0.0",
+        "tslib": "^2.0.1"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.3.tgz",
+          "integrity": "sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ=="
+        }
+      }
+    },
+    "@formatjs/intl-listformat": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/@formatjs/intl-listformat/-/intl-listformat-4.3.1.tgz",
+      "integrity": "sha512-BSJ3mzxD0xxfRLAuQCRUHcO4b+JA0/kfLybyLew6nD+TeBMpfxFWTcgN4E8qa3752eYK7eXM4XrXrJYm0nWWmg==",
+      "requires": {
+        "@formatjs/ecma402-abstract": "^1.2.6",
+        "tslib": "^2.0.1"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.3.tgz",
+          "integrity": "sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ=="
+        }
+      }
+    },
+    "@formatjs/intl-numberformat": {
+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/@formatjs/intl-numberformat/-/intl-numberformat-5.7.1.tgz",
+      "integrity": "sha512-wVkzeqIAxfibB7zekX4xJbHrVfqy6zik2xd4f0zhD4UAn/JfxSin4nFfY35VNr7R0ZtvPqrKBnbddEpyXRF+Zw==",
+      "requires": {
+        "@formatjs/ecma402-abstract": "^1.2.6",
+        "tslib": "^2.0.1"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.3.tgz",
+          "integrity": "sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ=="
+        }
+      }
+    },
+    "@formatjs/intl-pluralrules": {
+      "version": "3.5.1",
+      "resolved": "https://registry.npmjs.org/@formatjs/intl-pluralrules/-/intl-pluralrules-3.5.1.tgz",
+      "integrity": "sha512-EMWj2WI/12a6fro1GkgcagW1UesuQxzz0NaVBVogXlmHxYu1EtPDLy+R38GzZfb1wMOWfsZk9fO/XHvOjA70hw==",
+      "requires": {
+        "@formatjs/ecma402-abstract": "^1.2.6",
+        "tslib": "^2.0.1"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.3.tgz",
+          "integrity": "sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ=="
+        }
+      }
+    },
+    "@formatjs/intl-relativetimeformat": {
+      "version": "7.3.1",
+      "resolved": "https://registry.npmjs.org/@formatjs/intl-relativetimeformat/-/intl-relativetimeformat-7.3.1.tgz",
+      "integrity": "sha512-OcPSa2sU262MSTTRAgGggs9V9tXWJSu54Ugwe5x/sNUUDlbsen0HZc7N05JJSDTW/XWxGzHKkhSqC9TB49+Caw==",
+      "requires": {
+        "@formatjs/ecma402-abstract": "^1.2.6",
+        "tslib": "^2.0.1"
+      },
+      "dependencies": {
+        "tslib": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.3.tgz",
+          "integrity": "sha512-uZtkfKblCEQtZKBF6EBXVZeQNl82yqtDQdv+eck8u7tdPxjLu2/lp5/uPW+um2tpuxINHWy3GhiccY7QgEaVHQ=="
+        }
+      }
+    },
+    "@juggle/resize-observer": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/@juggle/resize-observer/-/resize-observer-3.2.0.tgz",
+      "integrity": "sha512-fsLxt0CHx2HCV9EL8lDoVkwHffsA0snUpddYjdLyXcG5E41xaamn9ZyQqOE9TUJdrRlH8/hjIf+UdOdDeKCUgg=="
+    },
     "@nodelib/fs.scandir": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.3.tgz",
       "integrity": "sha512-eGmwYQn3gxo4r7jdQnkrrN6bY478C3P+a/y72IJukF8LjB6ZHeB3c+Ehacj3sYeSmUXGlnA67/PmbM9CVwL7Dw==",
-      "dev": true,
       "requires": {
         "@nodelib/fs.stat": "2.0.3",
         "run-parallel": "^1.1.9"
@@ -133,19 +310,37 @@
     "@nodelib/fs.stat": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-2.0.3.tgz",
-      "integrity": "sha512-bQBFruR2TAwoevBEd/NWMoAAtNGzTRgdrqnYCc7dhzfoNvqPzLyqlEQnzZ3kVnNrSp25iyxE00/3h2fqGAGArA==",
-      "dev": true
+      "integrity": "sha512-bQBFruR2TAwoevBEd/NWMoAAtNGzTRgdrqnYCc7dhzfoNvqPzLyqlEQnzZ3kVnNrSp25iyxE00/3h2fqGAGArA=="
     },
     "@nodelib/fs.walk": {
       "version": "1.2.4",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.walk/-/fs.walk-1.2.4.tgz",
       "integrity": "sha512-1V9XOY4rDW0rehzbrcqAmHnz8e7SKvX27gh8Gt2WgB0+pdzdiLV83p72kZPU+jvMbS1qU5mauP2iOvO8rhmurQ==",
-      "dev": true,
       "requires": {
         "@nodelib/fs.scandir": "2.1.3",
         "fastq": "^1.6.0"
       }
     },
+    "@ts-morph/common": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/@ts-morph/common/-/common-0.5.2.tgz",
+      "integrity": "sha512-eLmfYV6u6gUgHrB9QV9lpuWg3cD60mhXdv0jvM5exWR/Cor8HG+GziFIj2hPEWHJknqzuU4meZd8DTqIzZfDRQ==",
+      "requires": {
+        "@dsherret/to-absolute-glob": "^2.0.2",
+        "fast-glob": "^3.2.2",
+        "fs-extra": "^9.0.0",
+        "is-negated-glob": "^1.0.0",
+        "multimatch": "^4.0.0",
+        "typescript": "~3.9.7"
+      },
+      "dependencies": {
+        "typescript": {
+          "version": "3.9.7",
+          "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.7.tgz",
+          "integrity": "sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw=="
+        }
+      }
+    },
     "@types/body-parser": {
       "version": "1.19.0",
       "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.0.tgz",
@@ -236,6 +431,11 @@
       "integrity": "sha512-Jus9s4CDbqwocc5pOAnh8ShfrnMcPHuJYzVcSUU7lrh8Ni5HuIqX3oilL86p3dlTrk0LzHRCgA/GQ7uNCw6l2Q==",
       "dev": true
     },
+    "@types/minimatch": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.3.tgz",
+      "integrity": "sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA=="
+    },
     "@types/node": {
       "version": "14.14.7",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-14.14.7.tgz",
@@ -476,11 +676,29 @@
         "eslint-visitor-keys": "^2.0.0"
       }
     },
+    "@webcomponents/template": {
+      "version": "1.4.4",
+      "resolved": "https://registry.npmjs.org/@webcomponents/template/-/template-1.4.4.tgz",
+      "integrity": "sha512-QqCmmywIKJTilkl6UIPLxEBBuqhDaOBpvQyKOnUEwl9lJuVHBrVlhMIhhnp9VSZJ6xEUnp+PiX8DST1k0q/v4Q=="
+    },
+    "Base64": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/Base64/-/Base64-1.1.0.tgz",
+      "integrity": "sha512-qeacf8dvGpf+XAT27ESHMh7z84uRzj/ua2pQdJg483m3bEXv/kVFtDnMgvf70BQGqzbZhR9t6BmASzKvqfJf3Q=="
+    },
     "abbrev": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
       "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q=="
     },
+    "abort-controller": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/abort-controller/-/abort-controller-3.0.0.tgz",
+      "integrity": "sha512-h8lQ8tacZYnR3vNQTgibj+tODHI5/+l06Au2Pcriv/Gmet0eaj4TwWH41sO9wnHDiQsEj19q0drzdWdeAHtweg==",
+      "requires": {
+        "event-target-shim": "^5.0.0"
+      }
+    },
     "accepts": {
       "version": "1.3.7",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
@@ -512,6 +730,16 @@
         "uri-js": "^4.2.2"
       }
     },
+    "align-text": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
+      "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
+      "requires": {
+        "kind-of": "^3.0.2",
+        "longest": "^1.0.1",
+        "repeat-string": "^1.5.2"
+      }
+    },
     "amdefine": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
@@ -560,6 +788,11 @@
         "sprintf-js": "~1.0.2"
       }
     },
+    "array-differ": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/array-differ/-/array-differ-3.0.0.tgz",
+      "integrity": "sha512-THtfYS6KtME/yIAhKjZ2ul7XI96lQGHRputJQHO80LAWQnuGP4iCIN8vdMRboGbIEYBwU33q8Tch1os2+X0kMg=="
+    },
     "array-find-index": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
@@ -573,8 +806,12 @@
     "array-union": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/array-union/-/array-union-2.1.0.tgz",
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-      "dev": true
+      "integrity": "sha512-HGyxoOTYUyCM6stUe6EJgnd4EoewAI7zMdfqO+kGjnlZmBDz/cR5pf8r/cR4Wq60sL/p0IkcjUEEPwS3GFrIyw=="
+    },
+    "arrify": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/arrify/-/arrify-2.0.1.tgz",
+      "integrity": "sha512-3duEwti880xqi4eAMN8AyR4a0ByT90zoYdLlevfrvU43vb0YZwZVfxOgxWrLXXXpyugL0hNZc9G6BiB5B3nUug=="
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     "asap": {
       "version": "2.0.6",
@@ -620,6 +857,16 @@
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
       "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
     },
+    "at-least-node": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/at-least-node/-/at-least-node-1.0.0.tgz",
+      "integrity": "sha512-+q/t7Ekv1EDY2l6Gda6LLiX14rU9TV20Wa3ofeQmwPFZbOMo9DXrLbOjFaaclkXKWidIaopwAObQDqwWtGUjqg=="
+    },
+    "audio-context-polyfill": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/audio-context-polyfill/-/audio-context-polyfill-1.0.0.tgz",
+      "integrity": "sha1-S3KPrwoZVVGU1PvQVYL4M/3NE3s="
+    },
     "aws-sign2": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
@@ -689,7 +936,6 @@
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
       "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==",
-      "dev": true,
       "requires": {
         "fill-range": "^7.0.1"
       }
@@ -702,8 +948,7 @@
     "callsites": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
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       "resolved": "https://registry.npmjs.org/tsc-watch/-/tsc-watch-4.2.9.tgz",
@@ -3584,6 +4233,55 @@
       "integrity": "sha512-ywmr/VrTVCmNTJ6iV2LwIrfG1P+lv6luD8sUJs+2eI9NLGigaN+nUQc13iHqisq7bra9lnmUSYqbJvegraBOPQ==",
       "dev": true
     },
+    "uglify-js": {
+      "version": "2.8.29",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.8.29.tgz",
+      "integrity": "sha1-KcVzMUgFe7Th913zW3qcty5qWd0=",
+      "requires": {
+        "source-map": "~0.5.1",
+        "uglify-to-browserify": "~1.0.0",
+        "yargs": "~3.10.0"
+      },
+      "dependencies": {
+        "camelcase": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
+          "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk="
+        },
+        "cliui": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/cliui/-/cliui-2.1.0.tgz",
+          "integrity": "sha1-S0dXYP+AJkx2LDoXGQMukcf+oNE=",
+          "requires": {
+            "center-align": "^0.1.1",
+            "right-align": "^0.1.1",
+            "wordwrap": "0.0.2"
+          }
+        },
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w="
+        },
+        "yargs": {
+          "version": "3.10.0",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
+          "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
+          "requires": {
+            "camelcase": "^1.0.2",
+            "cliui": "^2.1.0",
+            "decamelize": "^1.0.0",
+            "window-size": "0.1.0"
+          }
+        }
+      }
+    },
+    "uglify-to-browserify": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz",
+      "integrity": "sha1-bgkk1r2mta/jSeOabWMoUKD4grc=",
+      "optional": true
+    },
     "uid-safe": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/uid-safe/-/uid-safe-2.1.5.tgz",
@@ -3592,6 +4290,21 @@
         "random-bytes": "~1.0.0"
       }
     },
+    "unc-path-regex": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/unc-path-regex/-/unc-path-regex-0.1.2.tgz",
+      "integrity": "sha1-5z3T17DXxe2G+6xrCufYxqadUPo="
+    },
+    "universalify": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-1.0.0.tgz",
+      "integrity": "sha512-rb6X1W158d7pRQBg5gkR8uPaSfiids68LTJQYOtEUhoJUWBdaQHsuT/EUduxXYxcrt4r5PJ4fuHW1MHT6p0qug=="
+    },
+    "unorm": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/unorm/-/unorm-1.6.0.tgz",
+      "integrity": "sha512-b2/KCUlYZUeA7JFUuRJZPUtr4gZvBh7tavtv4fvk4+KV9pfGiR6CQAQAWl49ZpR3ts2dk4FYkP7EIgDJoiOLDA=="
+    },
     "unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
@@ -3605,6 +4318,11 @@
         "punycode": "^2.1.0"
       }
     },
+    "usertiming": {
+      "version": "0.1.8",
+      "resolved": "https://registry.npmjs.org/usertiming/-/usertiming-0.1.8.tgz",
+      "integrity": "sha1-NTeOf0GiSNQOZY0F+AQjRpp7BlA="
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -3655,6 +4373,16 @@
       "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
       "integrity": "sha1-YU9/v42AHwu18GYfWy9XhXUOTwk="
     },
+    "web-animations-js": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/web-animations-js/-/web-animations-js-2.3.2.tgz",
+      "integrity": "sha512-TOMFWtQdxzjWp8qx4DAraTWTsdhxVSiWa6NkPFSaPtZ1diKUxTn4yTix73A1euG1WbSOMMPcY51cnjTIHrGtDA=="
+    },
+    "whatwg-fetch": {
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.5.0.tgz",
+      "integrity": "sha512-jXkLtsR42xhXg7akoDKvKWE40eJeI+2KZqcp2h3NsOrRnDvtWX36KcKl30dy+hxECivdk2BVUHVNrPtoMBUx6A=="
+    },
     "which": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
@@ -3668,6 +4396,11 @@
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
       "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
     },
+    "wicg-inert": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/wicg-inert/-/wicg-inert-3.1.0.tgz",
+      "integrity": "sha512-P0ZiWaN9SxOkJbYtF/PIwmIRO8UTqTJtyl33QTQlHfAb6h15T0Dp5m7WTJ8N6UWIoj+KU5M0a8EtfRZLlHiP0Q=="
+    },
     "wide-align": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
@@ -3676,6 +4409,11 @@
         "string-width": "^1.0.2 || 2"
       }
     },
+    "window-size": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz",
+      "integrity": "sha1-VDjNLqk7IC76Ohn+iIeu58lPnJ0="
+    },
     "winston": {
       "version": "3.3.3",
       "resolved": "https://registry.npmjs.org/winston/-/winston-3.3.3.tgz",
@@ -3730,6 +4468,11 @@
       "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
       "dev": true
     },
+    "wordwrap": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.2.tgz",
+      "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8="
+    },
     "wrap-ansi": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-5.1.0.tgz",
@@ -3803,6 +4546,11 @@
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
       "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w=="
     },
+    "yaku": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/yaku/-/yaku-1.0.1.tgz",
+      "integrity": "sha512-uZCrhA5DEytGnFfw9XZKIoWRG43v6oCA20vInFS4anPJb3G5Hy+PKuaKSMTJ+aChvFdNDxY5K8jFx5wmlLbTjQ=="
+    },
     "yallist": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
diff --git a/package.json b/package.json
index 9d502f4..b7f64d4 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "install-prod-win": "npm install --only=dev && npm install --only=prod && npm run build && rmdir /Q/S node_modules && npm install --only=prod"
   },
   "dependencies": {
+    "@10xjs/polyfill-analyzer": "^0.1.0",
     "connect-redis": "^5.0.0",
     "cookie-parser": "~1.4.4",
     "env-var": "^6.3.0",
@@ -25,9 +26,12 @@
     "json-prune": "^1.1.0",
     "node-fetch": "^2.6.1",
     "node-sass-middleware": "0.11.0",
+    "polyfill-library": "^3.97.0",
     "proper-url-join": "^2.1.1",
     "pug": "^3.0.0",
     "redis": "^3.0.2",
+    "threads": "^1.6.3",
+    "tiny-worker": "^2.3.0",
     "uuid": "^8.3.1",
     "winston": "^3.3.3"
   },
diff --git a/public/js-source/tsconfig.json b/public/js-source/tsconfig.json
index 38544eb..9905215 100644
--- a/public/js-source/tsconfig.json
+++ b/public/js-source/tsconfig.json
@@ -10,7 +10,7 @@
     "forceConsistentCasingInFileNames": true,
     "noImplicitReturns": true,
     "strict": true,
-    "sourceRoot": "./src",
+    "sourceRoot": "../js-source",
     "rootDir": ".",
     "skipLibCheck": true,
     "baseUrl": "."
diff --git a/src/app.ts b/src/app.ts
index 85777f3..e4648a1 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -6,7 +6,7 @@ import * as redisStore from 'connect-redis';
 import * as session from 'express-session';
 import * as sassMiddleware from 'node-sass-middleware';
 import indexRouter from './routes';
-import {HttpLogger, Redis, Config, setupAuthProxy, getReloadRouter} from './utils';
+import {HttpLogger, Redis, Config, setupAuthProxy, getReloadRouter, polyfillRoute} from './utils';
 import {Store} from 'express-session';
 
 export const app = express();
@@ -46,6 +46,7 @@ router.use(session({
 }));
 
 // static config
+router.use("/js/polyfill.js", polyfillRoute);
 router.use(sassMiddleware({
   src: path.join(__dirname, '../public'),
   dest: path.join(__dirname, '../public'),
diff --git a/src/utils/helpers/resolvable.ts b/src/utils/helpers/resolvable.ts
index 42a55bd..679703f 100644
--- a/src/utils/helpers/resolvable.ts
+++ b/src/utils/helpers/resolvable.ts
@@ -58,7 +58,7 @@ export class Resolvable<T, U extends Array<unknown>> extends FetchOnce<T, U> {
 	}
 }
 
-export class WaitForSync<T, U extends Array<unknown>> extends FetchOnce<T, U> {
+export class WaitForSync<T> extends FetchOnce<T, never> {
 	protected state: ResolvableState = ResolvableState.PENDING;
 
 	constructor() {
diff --git a/src/utils/index.ts b/src/utils/index.ts
index ef022b5..a62f0c3 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -4,3 +4,4 @@ export {Logger, HttpLogger} from './logging';
 export {setupAuthProxy} from './auth-proxy';
 export {Resolvable, WaitForSync} from './helpers/resolvable';
 export {getReloadRouter} from './auto-reload';
+export {polyfillRoute} from './polyfill';
diff --git a/src/utils/logging.ts b/src/utils/logging.ts
index b2ad7c8..be08134 100644
--- a/src/utils/logging.ts
+++ b/src/utils/logging.ts
@@ -17,7 +17,7 @@ const logger = winston.createLogger({
 });
 
 const levels = ["error", "warn", "info", "http", "verbose", "debug", "silly"] as const;
-type LogLevels = typeof levels[number];
+type LogLevels = typeof levels[number]|"log";
 const wrapper = (original: LeveledLogMethod) => {
 	return (...args: unknown[]) => {
 		return original(args.map((obj) => typeof obj === "string" ? obj : prune(obj)).join(" "));
@@ -30,6 +30,7 @@ export const Logger = {
 for (const level of levels) {
 	Logger[level] = wrapper(logger[level]);
 }
+Logger.log = wrapper(logger["silly"]);
 
 export const HttpLogger: RequestHandler = (req, res, next) => {
 	const start = Date.now();
diff --git a/src/utils/polyfill-worker.ts b/src/utils/polyfill-worker.ts
new file mode 100644
index 0000000..77ddc29
--- /dev/null
+++ b/src/utils/polyfill-worker.ts
@@ -0,0 +1,25 @@
+// workers/add.js
+import {expose} from "threads/worker";
+import * as fs from "fs";
+import {analyze} from '@10xjs/polyfill-analyzer';
+import allPolyfills from '@10xjs/polyfill-analyzer/dist/polyfills';
+import {PolyfillFeatureList} from "polyfill-library";
+
+expose(() => {
+	const exclude = [
+		"console.markTimeline",
+		"console.timeline",
+		"console.timelineEnd",
+	];
+	const featureList = analyze({
+		source: fs.readFileSync('./public/js/bundle.js', 'utf-8'),
+		include: allPolyfills.filter(x => !exclude.includes(x)),
+		// Not all features listed by polyfillLibrary.listAllPolyfills()` can be detected.
+		unsupportedPolyfill: 'ignore',
+	});
+	const feats: PolyfillFeatureList = {};
+	for (const feature of featureList) {
+		feats[feature] = {};
+	}
+	return feats;
+});
diff --git a/src/utils/polyfill.ts b/src/utils/polyfill.ts
new file mode 100644
index 0000000..1f6a1e6
--- /dev/null
+++ b/src/utils/polyfill.ts
@@ -0,0 +1,35 @@
+import {RequestHandler} from 'express';
+import * as polyfillLibrary from 'polyfill-library';
+import {Config} from './config';
+import {PolyfillFeatureList} from 'polyfill-library';
+import {Logger} from './logging';
+import {WaitForSync} from './helpers/resolvable';
+import {spawn, Thread, Worker} from 'threads';
+import {WorkerFunction} from 'threads/dist/types/worker';
+
+const features = new WaitForSync<PolyfillFeatureList>();
+
+(async () => {
+	const worker = await spawn<WorkerFunction>(new Worker("./polyfill-worker"));
+	const feats = await worker() as PolyfillFeatureList;
+	await Thread.terminate(worker);
+	return feats;
+})()
+	.then(feats => {
+		Logger.debug("Polyfill analysed:", feats);
+		features.setData(feats);
+	})
+	.catch(err => features.setError(err));
+
+
+export const polyfillRoute: RequestHandler = async (req, res) => {
+	const polyfillBundle = await polyfillLibrary.getPolyfillString({
+		uaString: req.header("user-agent"),
+		features: await features.resolve(),
+		minify: Config.isProduction,
+		unknown: "polyfill",
+		stream: false,
+	});
+	res.setHeader('Content-Type', 'text/javascript');
+	res.send(polyfillBundle);
+};
diff --git a/src/utils/types/polyfill.d.ts b/src/utils/types/polyfill.d.ts
new file mode 100644
index 0000000..b8894ec
--- /dev/null
+++ b/src/utils/types/polyfill.d.ts
@@ -0,0 +1,37 @@
+declare module "polyfill-library" {
+	import {Readable} from 'stream';
+
+	function listAllPolyfills(): string[];
+	function describePolyfill(featureName: string): Promise<PolyfillMetadata|undefined>;
+	function getOptions(opts: Partial<PolyfillOptions>): PolyfillOptions;
+	function getPolyfills(opts: Partial<PolyfillOptions>): Promise<PolyfillFeatures>;
+	function getPolyfillString(opts: Partial<PolyfillOptions>&{stream?: true}): Readable;
+	function getPolyfillString(opts: Partial<PolyfillOptions>&{stream: false}): Promise<string>;
+
+	type PolyfillMetadata = {
+
+	};
+
+	type PolyfillFeatureList = {
+		[featureName: string]: {
+			flags?: string[]
+		}
+	};
+
+	type PolyfillOptions = {
+		minify: boolean,
+		unknown: 'polyfill'|'ignore',
+		features: PolyfillFeatureList,
+		excludes: string[],
+		uaString: string,
+		rum: boolean,
+	};
+
+	type PolyfillFeature = {
+		flags: string[],
+		dependencyOf: string[],
+		aliasOf: string[],
+	}
+
+	type PolyfillFeatures = { [featureName: string]: PolyfillFeature };
+}
diff --git a/views/layout.pug b/views/layout.pug
index 2f8e0e2..9ce1da7 100644
--- a/views/layout.pug
+++ b/views/layout.pug
@@ -8,6 +8,7 @@ html
       script(type='text/javascript', async, src=baseUrl+'/auto-reload/client.js')
   body
     block content
+    script(type='text/javascript', src=baseUrl+'/js/polyfill.js')
     script(type='text/javascript', src=baseUrl+'/js/require-2.3.6.min.js')
     script(type='text/javascript', src=baseUrl+'/js/bundle.js')
     script.