diff --git a/js-packages/tsconfig/.gitattributes b/js-packages/tsconfig/.gitattributes
new file mode 100644
index 000000000..2828cc899
--- /dev/null
+++ b/js-packages/tsconfig/.gitattributes
@@ -0,0 +1,16 @@
+.gitattributes export-ignore
+.gitignore export-ignore
+.gitmodules export-ignore
+.github export-ignore
+.travis export-ignore
+.travis.yml export-ignore
+.editorconfig export-ignore
+.styleci.yml export-ignore
+
+phpunit.xml export-ignore
+tests export-ignore
+
+js/dist/* -diff
+js/dist/* linguist-generated
+
+* text=auto eol=lf
diff --git a/js-packages/tsconfig/.gitignore b/js-packages/tsconfig/.gitignore
new file mode 100644
index 000000000..48b4971b0
--- /dev/null
+++ b/js-packages/tsconfig/.gitignore
@@ -0,0 +1,6 @@
+.DS_Store
+Thumbs.db
+.idea/*
+.vscode
+*.log
+node_modules/
diff --git a/js-packages/tsconfig/LICENSE b/js-packages/tsconfig/LICENSE
new file mode 100644
index 000000000..8e318481b
--- /dev/null
+++ b/js-packages/tsconfig/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2021 Stichting Flarum (Flarum Foundation)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/js-packages/tsconfig/README.md b/js-packages/tsconfig/README.md
new file mode 100644
index 000000000..1416fac50
--- /dev/null
+++ b/js-packages/tsconfig/README.md
@@ -0,0 +1,37 @@
+# Flarum Typescript Config
+
+A standardised `tsconfig.json` for use in Flarum extensions.
+
+## Usage
+
+You'll need to configure a `tsconfig.json` file to ensure your IDE sets up Typescript support correctly.
+
+You need to install this package as a dev dependency to your extension JS:
+
+```properties
+npm install --save-dev flarum-tsconfig
+yarn add --dev flarum-tsconfig
+```
+
+A baseline `tsconfig.json` is provided below that you can modify as needed. This file needs to be copied into your extension's `js` folder for your IDE to apply the correct settings.
+
+```jsonc
+{
+  // Use Flarum's tsconfig as a starting point
+  "extends": "flarum-tsconfig",
+  // This will match all .ts, .tsx, .d.ts, .js, .jsx files in your `src` folder
+  // and also tells your Typescript server to read core's global typings for
+  // access to `dayjs` and `$` in the global namespace.
+  "include": ["src/**/*", "../vendor/flarum/core/js/dist-typings/@types/**/*"],
+  "compilerOptions": {
+    // This will output typings to `dist-typings`
+    "declarationDir": "./dist-typings",
+    "baseUrl": ".",
+    "paths": {
+      "flarum/*": ["../vendor/flarum/core/js/dist-typings/*"]
+    }
+  }
+}
+```
+
+You'll also need to ensure that you run `composer update` in your extension's root directory to ensure that a copy of Flarum core is downloaded to your `vendor` folder. Remember that `vendor` should **not** be committed to Git repositories.
diff --git a/js-packages/tsconfig/package.json b/js-packages/tsconfig/package.json
new file mode 100644
index 000000000..a3f35f754
--- /dev/null
+++ b/js-packages/tsconfig/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "flarum-tsconfig",
+  "version": "1.0.2",
+  "description": "Flarum's official Typescript config file",
+  "main": "tsconfig.json",
+  "repository": "https://github.com/flarum/flarum-tsconfig",
+  "author": "Flarum Team",
+  "license": "MIT",
+  "dependencies": {
+    "@types/jquery": "^3.5.5",
+    "@types/mithril": "^2.0.7",
+    "@types/throttle-debounce": "^2.1.0",
+    "dayjs": "^1.10.4"
+  }
+}
diff --git a/js-packages/tsconfig/tsconfig.json b/js-packages/tsconfig/tsconfig.json
new file mode 100644
index 000000000..92bc9ec88
--- /dev/null
+++ b/js-packages/tsconfig/tsconfig.json
@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "allowUmdGlobalAccess": true,
+    "sourceMap": true,
+    "strict": true,
+    "noImplicitAny": true,
+    "noImplicitReturns": true,
+    "noImplicitThis": true,
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "module": "es2015",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "esModuleInterop": true,
+    "moduleResolution": "Node",
+    "target": "es6",
+    "jsx": "preserve",
+    "allowJs": true,
+    "lib": ["dom", "es5", "es2015", "es2016", "es2017", "es2018", "es2019.array"],
+    "allowSyntheticDefaultImports": true
+  }
+}
diff --git a/js-packages/tsconfig/yarn.lock b/js-packages/tsconfig/yarn.lock
new file mode 100644
index 000000000..7eb7c84e1
--- /dev/null
+++ b/js-packages/tsconfig/yarn.lock
@@ -0,0 +1,30 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@types/jquery@^3.5.5":
+  version "3.5.5"
+  resolved "https://registry.yarnpkg.com/@types/jquery/-/jquery-3.5.5.tgz#2c63f47c9c8d96693d272f5453602afd8338c903"
+  integrity sha512-6RXU9Xzpc6vxNrS6FPPapN1SxSHgQ336WC6Jj/N8q30OiaBZ00l1GBgeP7usjVZPivSkGUfL1z/WW6TX989M+w==
+  dependencies:
+    "@types/sizzle" "*"
+
+"@types/mithril@^2.0.7":
+  version "2.0.7"
+  resolved "https://registry.yarnpkg.com/@types/mithril/-/mithril-2.0.7.tgz#e4016c79ce206621d7aee23de189faf7b007e0d5"
+  integrity sha512-ByD422x0GnYh5MOEAWNyqfkw2QlKkK3Yf7y5e1CobDVPG9m+/ThblfrIHENihF7VnygT6sQRObPvY1J/fUZICg==
+
+"@types/sizzle@*":
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/@types/sizzle/-/sizzle-2.3.3.tgz#ff5e2f1902969d305225a047c8a0fd5c915cebef"
+  integrity sha512-JYM8x9EGF163bEyhdJBpR2QX1R5naCJHC8ucJylJ3w9/CVBaskdQ8WqBf8MmQrd1kRvp/a4TS8HJ+bxzR7ZJYQ==
+
+"@types/throttle-debounce@^2.1.0":
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/@types/throttle-debounce/-/throttle-debounce-2.1.0.tgz#1c3df624bfc4b62f992d3012b84c56d41eab3776"
+  integrity sha512-5eQEtSCoESnh2FsiLTxE121IiE60hnMqcb435fShf4bpLRjEu1Eoekht23y6zXS9Ts3l+Szu3TARnTsA0GkOkQ==
+
+dayjs@^1.10.4:
+  version "1.10.4"
+  resolved "https://registry.yarnpkg.com/dayjs/-/dayjs-1.10.4.tgz#8e544a9b8683f61783f570980a8a80eaf54ab1e2"
+  integrity sha512-RI/Hh4kqRc1UKLOAf/T5zdMMX5DQIlDxwUe3wSyMMnEbGunnpENCdbUgM+dW7kXidZqCttBrmw7BhN4TMddkCw==