align jest package versions

Updated jest related packages and code
to work with the latest major version.

Change-Id: I24a7ed09f324f372b5d29202ccd23d0bea2fbb9a
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/358537
Trust: Jamal Carvalho <jamal@golang.org>
Run-TryBot: Jamal Carvalho <jamal@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
diff --git a/jest.config.js b/jest.config.js
index 304209d..165ced5 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -6,6 +6,7 @@
  */
 
 let config = {
+  testEnvironment: 'jsdom',
   preset: 'ts-jest',
   globals: {
     'ts-jest': {
diff --git a/package-lock.json b/package-lock.json
index f2ecf06..3266c89 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1222,9 +1222,9 @@
       }
     },
     "@types/json-schema": {
-      "version": "7.0.6",
-      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.6.tgz",
-      "integrity": "sha512-3c+yGKvVP5Y9TYBEibGNR+kLtijnj7mYrXRg+WpFb2X9xm04g/DXYkfg4hmzJQosc9snFNUPkbYIhu+KAm6jJw=="
+      "version": "7.0.9",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.9.tgz",
+      "integrity": "sha512-qcUXuemtEu+E5wZSJHNxUXeCZhAfXKQ41D+duX+VYPde7xyEVZci+/oXKJL13tnRs9lR2pr4fod59GT6/X1/yQ=="
     },
     "@types/marked": {
       "version": "2.0.2",
@@ -1434,16 +1434,16 @@
       }
     },
     "@typescript-eslint/experimental-utils": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/experimental-utils/-/experimental-utils-4.5.0.tgz",
-      "integrity": "sha512-bW9IpSAKYvkqDGRZzayBXIgPsj2xmmVHLJ+flGSoN0fF98pGoKFhbunIol0VF2Crka7z984EEhFi623Rl7e6gg==",
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/experimental-utils/-/experimental-utils-5.2.0.tgz",
+      "integrity": "sha512-fWyT3Agf7n7HuZZRpvUYdFYbPk3iDCq6fgu3ulia4c7yxmPnwVBovdSOX7RL+k8u6hLbrXcdAehlWUVpGh6IEw==",
       "requires": {
-        "@types/json-schema": "^7.0.3",
-        "@typescript-eslint/scope-manager": "4.5.0",
-        "@typescript-eslint/types": "4.5.0",
-        "@typescript-eslint/typescript-estree": "4.5.0",
-        "eslint-scope": "^5.0.0",
-        "eslint-utils": "^2.0.0"
+        "@types/json-schema": "^7.0.9",
+        "@typescript-eslint/scope-manager": "5.2.0",
+        "@typescript-eslint/types": "5.2.0",
+        "@typescript-eslint/typescript-estree": "5.2.0",
+        "eslint-scope": "^5.1.1",
+        "eslint-utils": "^3.0.0"
       }
     },
     "@typescript-eslint/parser": {
@@ -1539,41 +1539,71 @@
       }
     },
     "@typescript-eslint/scope-manager": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-4.5.0.tgz",
-      "integrity": "sha512-C0cEO0cTMPJ/w4RA/KVe4LFFkkSh9VHoFzKmyaaDWAnPYIEzVCtJ+Un8GZoJhcvq+mPFXEsXa01lcZDHDG6Www==",
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-5.2.0.tgz",
+      "integrity": "sha512-RW+wowZqPzQw8MUFltfKYZfKXqA2qgyi6oi/31J1zfXJRpOn6tCaZtd9b5u9ubnDG2n/EMvQLeZrsLNPpaUiFQ==",
       "requires": {
-        "@typescript-eslint/types": "4.5.0",
-        "@typescript-eslint/visitor-keys": "4.5.0"
+        "@typescript-eslint/types": "5.2.0",
+        "@typescript-eslint/visitor-keys": "5.2.0"
       }
     },
     "@typescript-eslint/types": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-4.5.0.tgz",
-      "integrity": "sha512-n2uQoXnyWNk0Les9MtF0gCK3JiWd987JQi97dMSxBOzVoLZXCNtxFckVqt1h8xuI1ix01t+iMY4h4rFMj/303g=="
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-5.2.0.tgz",
+      "integrity": "sha512-cTk6x08qqosps6sPyP2j7NxyFPlCNsJwSDasqPNjEQ8JMD5xxj2NHxcLin5AJQ8pAVwpQ8BMI3bTxR0zxmK9qQ=="
     },
     "@typescript-eslint/typescript-estree": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-4.5.0.tgz",
-      "integrity": "sha512-gN1mffq3zwRAjlYWzb5DanarOPdajQwx5MEWkWCk0XvqC8JpafDTeioDoow2L4CA/RkYZu7xEsGZRhqrTsAG8w==",
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-5.2.0.tgz",
+      "integrity": "sha512-RsdXq2XmVgKbm9nLsE3mjNUM7BTr/K4DYR9WfFVMUuozHWtH5gMpiNZmtrMG8GR385EOSQ3kC9HiEMJWimxd/g==",
       "requires": {
-        "@typescript-eslint/types": "4.5.0",
-        "@typescript-eslint/visitor-keys": "4.5.0",
-        "debug": "^4.1.1",
-        "globby": "^11.0.1",
-        "is-glob": "^4.0.1",
-        "lodash": "^4.17.15",
-        "semver": "^7.3.2",
-        "tsutils": "^3.17.1"
+        "@typescript-eslint/types": "5.2.0",
+        "@typescript-eslint/visitor-keys": "5.2.0",
+        "debug": "^4.3.2",
+        "globby": "^11.0.4",
+        "is-glob": "^4.0.3",
+        "semver": "^7.3.5",
+        "tsutils": "^3.21.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.3.2",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.2.tgz",
+          "integrity": "sha512-mOp8wKcvj7XxC78zLgw/ZA+6TSgkoE2C/ienthhRD298T7UNwAg9diBpLRxC0mOezLl4B0xV7M0cCO6P/O0Xhw==",
+          "requires": {
+            "ms": "2.1.2"
+          }
+        },
+        "globby": {
+          "version": "11.0.4",
+          "resolved": "https://registry.npmjs.org/globby/-/globby-11.0.4.tgz",
+          "integrity": "sha512-9O4MVG9ioZJ08ffbcyVYyLOJLk5JQ688pJ4eMGLpdWLHq/Wr1D9BlriLQyL0E+jbkuePVZXYFj47QM/v093wHg==",
+          "requires": {
+            "array-union": "^2.1.0",
+            "dir-glob": "^3.0.1",
+            "fast-glob": "^3.1.1",
+            "ignore": "^5.1.4",
+            "merge2": "^1.3.0",
+            "slash": "^3.0.0"
+          }
+        },
+        "semver": {
+          "version": "7.3.5",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.5.tgz",
+          "integrity": "sha512-PoeGJYh8HK4BTO/a9Tf6ZG3veo/A7ZVsYrSA6J8ny9nb3B1VrpkuN+z9OE5wfE5p6H4LchYZsegiQgbJD94ZFQ==",
+          "requires": {
+            "lru-cache": "^6.0.0"
+          }
+        }
       }
     },
     "@typescript-eslint/visitor-keys": {
-      "version": "4.5.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-4.5.0.tgz",
-      "integrity": "sha512-UHq4FSa55NDZqscRU//O5ROFhHa9Hqn9KWTEvJGTArtTQp5GKv9Zqf6d/Q3YXXcFv4woyBml7fJQlQ+OuqRcHA==",
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-5.2.0.tgz",
+      "integrity": "sha512-Nk7HizaXWWCUBfLA/rPNKMzXzWS8Wg9qHMuGtT+v2/YpPij4nVXrVJc24N/r5WrrmqK31jCrZxeHqIgqRzs0Xg==",
       "requires": {
-        "@typescript-eslint/types": "4.5.0",
-        "eslint-visitor-keys": "^2.0.0"
+        "@typescript-eslint/types": "5.2.0",
+        "eslint-visitor-keys": "^3.0.0"
       }
     },
     "abab": {
@@ -2039,9 +2069,9 @@
       "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg=="
     },
     "ci-info": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/ci-info/-/ci-info-2.0.0.tgz",
-      "integrity": "sha512-5tK7EtrZ0N+OLFMthtqOj4fI2Jeb88C4CAZPu25LDVUgXJ0A3Js4PMGqrn0JU1W0Mh1/Z8wZzYPxqUrXeBboCQ=="
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/ci-info/-/ci-info-3.2.0.tgz",
+      "integrity": "sha512-dVqRX7fLUm8J6FgHJ418XuIgDLZDkYcDFTeL6TA2gt5WlIZUQrrH6EZrNClwT/H0FateUsZkGIOPRrLbP+PR9A=="
     },
     "cjs-module-lexer": {
       "version": "1.2.2",
@@ -2629,11 +2659,11 @@
       }
     },
     "eslint-plugin-jest": {
-      "version": "24.1.3",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-jest/-/eslint-plugin-jest-24.1.3.tgz",
-      "integrity": "sha512-dNGGjzuEzCE3d5EPZQ/QGtmlMotqnYWD/QpCZ1UuZlrMAdhG5rldh0N0haCvhGnUkSeuORS5VNROwF9Hrgn3Lg==",
+      "version": "25.2.2",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-jest/-/eslint-plugin-jest-25.2.2.tgz",
+      "integrity": "sha512-frn5yhOF60U4kcqozO3zKTNZQUk+mfx037XOy2iiYL8FhorEkuCuL3/flzKcY1ECDP2WYT9ydmvlO3fRW9o4mg==",
       "requires": {
-        "@typescript-eslint/experimental-utils": "^4.0.1"
+        "@typescript-eslint/experimental-utils": "^5.0.0"
       }
     },
     "eslint-plugin-prettier": {
@@ -2654,24 +2684,24 @@
       }
     },
     "eslint-utils": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-2.1.0.tgz",
-      "integrity": "sha512-w94dQYoauyvlDc43XnGB8lU3Zt713vNChgt4EWwhXAP2XkBvndfxF0AgIqKOOasjPIPzj9JqgwkwbCYD0/V3Zg==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-3.0.0.tgz",
+      "integrity": "sha512-uuQC43IGctw68pJA1RgbQS8/NP7rch6Cwd4j3ZBtgo4/8Flj4eGE7ZYSZRN3iq5pVUv6GPdW5Z1RFleo84uLDA==",
       "requires": {
-        "eslint-visitor-keys": "^1.1.0"
+        "eslint-visitor-keys": "^2.0.0"
       },
       "dependencies": {
         "eslint-visitor-keys": {
-          "version": "1.3.0",
-          "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-1.3.0.tgz",
-          "integrity": "sha512-6J72N8UNa462wa/KFODt/PJ3IU60SDpC3QXC1Hjc1BXXpfL2C9R5+AU7jhe0F6GREqVMh4Juu+NY7xn+6dipUQ=="
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-2.1.0.tgz",
+          "integrity": "sha512-0rSmRBzXgDzIsD6mGdJgevzgezI534Cer5L/vyMX0kHzT/jiB43jRhd9YUlMGYLQy2zprNmoT8qasCGtY+QaKw=="
         }
       }
     },
     "eslint-visitor-keys": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-2.0.0.tgz",
-      "integrity": "sha512-QudtT6av5WXels9WjIM7qz1XD1cWGvX4gGXvp/zBn9nXG02D0utdU3Em2m/QjTnrsk6bBjmCygl3rmj118msQQ=="
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-3.0.0.tgz",
+      "integrity": "sha512-mJOZa35trBTb3IyRmo8xmKBZlxf+N7OnUl4+ZhJHs/r+0770Wh/LEACE2pqMGMe27G/4y8P2bYGk4J70IC5k1Q=="
     },
     "espree": {
       "version": "9.0.0",
@@ -3377,14 +3407,6 @@
       "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.2.2.tgz",
       "integrity": "sha512-dnMqspv5nU3LoewK2N/y7KLtxtakvTuaCsU9FU50/QDmdbHNy/4/JuRtMHqRU22o3q+W89YQndQEeCVwK+3qrA=="
     },
-    "is-ci": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/is-ci/-/is-ci-2.0.0.tgz",
-      "integrity": "sha512-YfJT7rkpQB0updsdHLGWrvhBJfcfzNNawYDNIyQXJz0IViGf75O8EBPKSdvw2rF+LGCsX4FZ8tcr3b19LcZq4w==",
-      "requires": {
-        "ci-info": "^2.0.0"
-      }
-    },
     "is-core-module": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.2.0.tgz",
@@ -4026,6 +4048,41 @@
         }
       }
     },
+    "jest-environment-node": {
+      "version": "27.3.1",
+      "resolved": "https://registry.npmjs.org/jest-environment-node/-/jest-environment-node-27.3.1.tgz",
+      "integrity": "sha512-T89F/FgkE8waqrTSA7/ydMkcc52uYPgZZ6q8OaZgyiZkJb5QNNCF6oPZjH9IfPFfcc9uBWh1574N0kY0pSvTXw==",
+      "requires": {
+        "@jest/environment": "^27.3.1",
+        "@jest/fake-timers": "^27.3.1",
+        "@jest/types": "^27.2.5",
+        "@types/node": "*",
+        "jest-mock": "^27.3.0",
+        "jest-util": "^27.3.1"
+      },
+      "dependencies": {
+        "@jest/types": {
+          "version": "27.2.5",
+          "resolved": "https://registry.npmjs.org/@jest/types/-/types-27.2.5.tgz",
+          "integrity": "sha512-nmuM4VuDtCZcY+eTpw+0nvstwReMsjPoj7ZR80/BbixulhLaiX+fbv8oeLW8WZlJMcsGQsTmMKT/iTZu1Uy/lQ==",
+          "requires": {
+            "@types/istanbul-lib-coverage": "^2.0.0",
+            "@types/istanbul-reports": "^3.0.0",
+            "@types/node": "*",
+            "@types/yargs": "^16.0.0",
+            "chalk": "^4.0.0"
+          }
+        },
+        "@types/yargs": {
+          "version": "16.0.4",
+          "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-16.0.4.tgz",
+          "integrity": "sha512-T8Yc9wt/5LbJyCaLiHPReJa0kApcIgJ7Bn735GjItUfh08Z1pJvu8QZqb9s+mMvKV6WUQRV7K2R46YbjMXTTJw==",
+          "requires": {
+            "@types/yargs-parser": "*"
+          }
+        }
+      }
+    },
     "jest-get-type": {
       "version": "26.3.0",
       "resolved": "https://registry.npmjs.org/jest-get-type/-/jest-get-type-26.3.0.tgz",
@@ -4599,16 +4656,38 @@
       }
     },
     "jest-util": {
-      "version": "26.6.2",
-      "resolved": "https://registry.npmjs.org/jest-util/-/jest-util-26.6.2.tgz",
-      "integrity": "sha512-MDW0fKfsn0OI7MS7Euz6h8HNDXVQ0gaM9uW6RjfDmd1DAFcaxX9OqIakHIqhbnmF08Cf2DLDG+ulq8YQQ0Lp0Q==",
+      "version": "27.3.1",
+      "resolved": "https://registry.npmjs.org/jest-util/-/jest-util-27.3.1.tgz",
+      "integrity": "sha512-8fg+ifEH3GDryLQf/eKZck1DEs2YuVPBCMOaHQxVVLmQwl/CDhWzrvChTX4efLZxGrw+AA0mSXv78cyytBt/uw==",
       "requires": {
-        "@jest/types": "^26.6.2",
+        "@jest/types": "^27.2.5",
         "@types/node": "*",
         "chalk": "^4.0.0",
+        "ci-info": "^3.2.0",
         "graceful-fs": "^4.2.4",
-        "is-ci": "^2.0.0",
-        "micromatch": "^4.0.2"
+        "picomatch": "^2.2.3"
+      },
+      "dependencies": {
+        "@jest/types": {
+          "version": "27.2.5",
+          "resolved": "https://registry.npmjs.org/@jest/types/-/types-27.2.5.tgz",
+          "integrity": "sha512-nmuM4VuDtCZcY+eTpw+0nvstwReMsjPoj7ZR80/BbixulhLaiX+fbv8oeLW8WZlJMcsGQsTmMKT/iTZu1Uy/lQ==",
+          "requires": {
+            "@types/istanbul-lib-coverage": "^2.0.0",
+            "@types/istanbul-reports": "^3.0.0",
+            "@types/node": "*",
+            "@types/yargs": "^16.0.0",
+            "chalk": "^4.0.0"
+          }
+        },
+        "@types/yargs": {
+          "version": "16.0.4",
+          "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-16.0.4.tgz",
+          "integrity": "sha512-T8Yc9wt/5LbJyCaLiHPReJa0kApcIgJ7Bn735GjItUfh08Z1pJvu8QZqb9s+mMvKV6WUQRV7K2R46YbjMXTTJw==",
+          "requires": {
+            "@types/yargs-parser": "*"
+          }
+        }
       }
     },
     "jest-validate": {
@@ -6963,28 +7042,18 @@
       "integrity": "sha512-rvuRbTarPXmMb79SmzEp8aqXNKcK+y0XaB298IXueQ8I2PsrATcPBCSPyK/dDNa2iWOhKlfNnOjdAOTBU/nkFA=="
     },
     "ts-jest": {
-      "version": "26.4.4",
-      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-26.4.4.tgz",
-      "integrity": "sha512-3lFWKbLxJm34QxyVNNCgXX1u4o/RV0myvA2y2Bxm46iGIjKlaY0own9gIckbjZJPn+WaJEnfPPJ20HHGpoq4yg==",
+      "version": "27.0.7",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-27.0.7.tgz",
+      "integrity": "sha512-O41shibMqzdafpuP+CkrOL7ykbmLh+FqQrXEmV9CydQ5JBk0Sj0uAEF5TNNe94fZWKm3yYvWa/IbyV4Yg1zK2Q==",
       "requires": {
-        "@types/jest": "26.x",
         "bs-logger": "0.x",
-        "buffer-from": "1.x",
         "fast-json-stable-stringify": "2.x",
-        "jest-util": "^26.1.0",
+        "jest-util": "^27.0.0",
         "json5": "2.x",
         "lodash.memoize": "4.x",
         "make-error": "1.x",
-        "mkdirp": "1.x",
         "semver": "7.x",
         "yargs-parser": "20.x"
-      },
-      "dependencies": {
-        "mkdirp": {
-          "version": "1.0.4",
-          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
-          "integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw=="
-        }
       }
     },
     "tslib": {
@@ -6993,9 +7062,9 @@
       "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg=="
     },
     "tsutils": {
-      "version": "3.17.1",
-      "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-3.17.1.tgz",
-      "integrity": "sha512-kzeQ5B8H3w60nFY2g8cJIuH7JDpsALXySGtwGJ0p2LSjLgay3NdIpqq5SoOBe46bKDW2iq25irHCr8wjomUS2g==",
+      "version": "3.21.0",
+      "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-3.21.0.tgz",
+      "integrity": "sha512-mHKK3iUXL+3UF6xL5k0PEhKRUBKPBCv/+RkEOpjRWxxx27KKRBmmA60A9pgOUvMi8GKhRMPEmjBRPzs2W7O1OA==",
       "requires": {
         "tslib": "^1.8.1"
       }
diff --git a/package.json b/package.json
index 8ff97b9..40622a8 100644
--- a/package.json
+++ b/package.json
@@ -23,10 +23,11 @@
     "@typescript-eslint/parser": "^5.2.0",
     "eslint": "^8.1.0",
     "eslint-config-prettier": "6.14.0",
-    "eslint-plugin-jest": "24.1.3",
+    "eslint-plugin-jest": "25.2.2",
     "eslint-plugin-prettier": "3.3.0",
     "jest": "^27.3.1",
     "jest-circus": "^27.3.1",
+    "jest-environment-node": "^27.3.1",
     "jest-image-snapshot": "4.2.0",
     "js-green-licenses": "2.0.1",
     "marked": "2.0.3",
@@ -40,7 +41,7 @@
     "stylelint-config-standard": "20.0.0",
     "stylelint-order": "4.1.0",
     "stylelint-prettier": "1.1.2",
-    "ts-jest": "26.4.4",
+    "ts-jest": "^27.0.7",
     "typescript": "4.0.3"
   }
 }
diff --git a/static/shared/playground/playground.test.ts b/static/shared/playground/playground.test.ts
index bd5fec5..02a468b 100644
--- a/static/shared/playground/playground.test.ts
+++ b/static/shared/playground/playground.test.ts
@@ -8,7 +8,7 @@
 import { PlaygroundExampleController } from './playground';
 import { mocked } from 'ts-jest/utils';
 
-const flushPromises = () => new Promise(setImmediate);
+const flushPromises = () => new Promise(fn => setTimeout(fn, 0));
 const el = <T extends HTMLElement>(selector: string) => document.querySelector<T>(selector);
 const codeSnippet = `package main