diff --git a/scripts/setupTypeScript.js b/scripts/setupTypeScript.js
new file mode 100644
index 0000000..1eb6b77
--- /dev/null
+++ b/scripts/setupTypeScript.js
@@ -0,0 +1,117 @@
+// @ts-check
+
+/** This script modifies the project to support TS code in .svelte files like:
+
+  <script lang="ts">
+  	export let name: string;
+  </script>
+ 
+  As well as validating the code for CI.
+  */
+
+/**  To work on this script:
+  rm -rf test-template template && git clone sveltejs/template test-template && node scripts/setupTypeScript.js test-template
+*/
+
+const fs = require("fs")
+const path = require("path")
+const { argv } = require("process")
+
+const projectRoot = argv[2] || path.join(__dirname, "..")
+
+// Add deps to pkg.json
+const packageJSON = JSON.parse(fs.readFileSync(path.join(projectRoot, "package.json"), "utf8"))
+packageJSON.devDependencies = Object.assign(packageJSON.devDependencies, {
+  "svelte-check": "^1.0.0",
+  "svelte-preprocess": "^4.0.0",
+  "@rollup/plugin-typescript": "^8.0.0",
+  "typescript": "^4.0.0",
+  "tslib": "^2.0.0",
+  "@tsconfig/svelte": "^1.0.0"
+})
+
+// Add script for checking
+packageJSON.scripts = Object.assign(packageJSON.scripts, {
+  "validate": "svelte-check"
+})
+
+// Write the package JSON
+fs.writeFileSync(path.join(projectRoot, "package.json"), JSON.stringify(packageJSON, null, "  "))
+
+// mv src/main.js to main.ts - note, we need to edit rollup.config.js for this too
+const beforeMainJSPath = path.join(projectRoot, "src", "main.js")
+const afterMainTSPath = path.join(projectRoot, "src", "main.ts")
+fs.renameSync(beforeMainJSPath, afterMainTSPath)
+
+// Switch the app.svelte file to use TS
+const appSveltePath = path.join(projectRoot, "src", "App.svelte")
+let appFile = fs.readFileSync(appSveltePath, "utf8")
+appFile = appFile.replace("<script>", '<script lang="ts">')
+appFile = appFile.replace("export let name;", 'export let name: string;')
+fs.writeFileSync(appSveltePath, appFile)
+
+// Edit rollup config
+const rollupConfigPath = path.join(projectRoot, "rollup.config.js")
+let rollupConfig = fs.readFileSync(rollupConfigPath, "utf8")
+
+// Edit imports
+rollupConfig = rollupConfig.replace(`'rollup-plugin-terser';`, `'rollup-plugin-terser';
+import sveltePreprocess from 'svelte-preprocess';
+import typescript from '@rollup/plugin-typescript';`)
+
+// Replace name of entry point
+rollupConfig = rollupConfig.replace(`'src/main.js'`, `'src/main.ts'`)
+
+// Add preprocessor
+rollupConfig = rollupConfig.replace(
+  'compilerOptions:',
+  'preprocess: sveltePreprocess({ sourceMap: !production }),\n\t\t\tcompilerOptions:'
+);
+
+// Add TypeScript
+rollupConfig = rollupConfig.replace(
+  'commonjs(),',
+  'commonjs(),\n\t\ttypescript({\n\t\t\tsourceMap: !production,\n\t\t\tinlineSources: !production\n\t\t}),'
+);
+fs.writeFileSync(rollupConfigPath, rollupConfig)
+
+// Add TSConfig
+const tsconfig = `{
+  "extends": "@tsconfig/svelte/tsconfig.json",
+
+  "include": ["src/**/*"],
+  "exclude": ["node_modules/*", "__sapper__/*", "public/*"]
+}`
+const tsconfigPath =  path.join(projectRoot, "tsconfig.json")
+fs.writeFileSync(tsconfigPath, tsconfig)
+
+// Delete this script, but not during testing
+if (!argv[2]) {
+  // Remove the script
+  fs.unlinkSync(path.join(__filename))
+
+  // Check for Mac's DS_store file, and if it's the only one left remove it
+  const remainingFiles = fs.readdirSync(path.join(__dirname))
+  if (remainingFiles.length === 1 && remainingFiles[0] === '.DS_store') {
+    fs.unlinkSync(path.join(__dirname, '.DS_store'))
+  }
+
+  // Check if the scripts folder is empty
+  if (fs.readdirSync(path.join(__dirname)).length === 0) {
+    // Remove the scripts folder
+    fs.rmdirSync(path.join(__dirname))
+  }
+}
+
+// Adds the extension recommendation
+fs.mkdirSync(path.join(projectRoot, ".vscode"), { recursive: true })
+fs.writeFileSync(path.join(projectRoot, ".vscode", "extensions.json"), `{
+  "recommendations": ["svelte.svelte-vscode"]
+}
+`)
+
+console.log("Converted to TypeScript.")
+
+if (fs.existsSync(path.join(projectRoot, "node_modules"))) {
+  console.log("\nYou will need to re-run your dependency manager to get started.")
+}