diff --git a/packages/sfc-playground/package.json b/packages/sfc-playground/package.json
index 2cad1619c66..713a6ac74ca 100644
--- a/packages/sfc-playground/package.json
+++ b/packages/sfc-playground/package.json
@@ -22,6 +22,7 @@
   },
   "dependencies": {
     "file-saver": "^2.0.5",
-    "jszip": "^3.6.0"
+    "jszip": "^3.6.0",
+    "sucrase": "^3.19.0"
   }
 }
diff --git a/packages/sfc-playground/src/sfcCompiler.ts b/packages/sfc-playground/src/sfcCompiler.ts
index 43e7d9facba..8fe74f9ecc1 100644
--- a/packages/sfc-playground/src/sfcCompiler.ts
+++ b/packages/sfc-playground/src/sfcCompiler.ts
@@ -59,17 +59,24 @@ export async function compileFile({ filename, code, compiled }: File) {
   }
 
   if (
-    (descriptor.script && descriptor.script.lang) ||
-    (descriptor.scriptSetup && descriptor.scriptSetup.lang) ||
     descriptor.styles.some(s => s.lang) ||
     (descriptor.template && descriptor.template.lang)
   ) {
     store.errors = [
-      'lang="x" pre-processors are not supported in the in-browser playground.'
+      `lang="x" pre-processors for <template> or <style> are currently not ` +
+        `supported.`
     ]
     return
   }
 
+  const scriptLang =
+    (descriptor.script && descriptor.script.lang) ||
+    (descriptor.scriptSetup && descriptor.scriptSetup.lang)
+  if (scriptLang && scriptLang !== 'ts') {
+    store.errors = [`Only lang="ts" is supported for <script> blocks.`]
+    return
+  }
+
   const hasScoped = descriptor.styles.some(s => s.scoped)
   let clientCode = ''
   let ssrCode = ''
@@ -79,7 +86,7 @@ export async function compileFile({ filename, code, compiled }: File) {
     ssrCode += code
   }
 
-  const clientScriptResult = doCompileScript(descriptor, id, false)
+  const clientScriptResult = await doCompileScript(descriptor, id, false)
   if (!clientScriptResult) {
     return
   }
@@ -89,7 +96,7 @@ export async function compileFile({ filename, code, compiled }: File) {
   // script ssr only needs to be performed if using <script setup> where
   // the render fn is inlined.
   if (descriptor.scriptSetup) {
-    const ssrScriptResult = doCompileScript(descriptor, id, true)
+    const ssrScriptResult = await doCompileScript(descriptor, id, true)
     if (!ssrScriptResult) {
       return
     }
@@ -171,11 +178,11 @@ export async function compileFile({ filename, code, compiled }: File) {
   store.errors = []
 }
 
-function doCompileScript(
+async function doCompileScript(
   descriptor: SFCDescriptor,
   id: string,
   ssr: boolean
-): [string, BindingMetadata | undefined] | undefined {
+): Promise<[string, BindingMetadata | undefined] | undefined> {
   if (descriptor.script || descriptor.scriptSetup) {
     try {
       const compiledScript = SFCCompiler.compileScript(descriptor, {
@@ -198,6 +205,13 @@ function doCompileScript(
       code +=
         `\n` +
         SFCCompiler.rewriteDefault(compiledScript.content, COMP_IDENTIFIER)
+
+      if ((descriptor.script || descriptor.scriptSetup)!.lang === 'ts') {
+        code = (await import('sucrase')).transform(code, {
+          transforms: ['typescript']
+        }).code
+      }
+
       return [code, compiledScript.bindings]
     } catch (e) {
       store.errors = [e]
diff --git a/yarn.lock b/yarn.lock
index 40e3ed7bbef..23f51c3be0e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1066,6 +1066,11 @@ ansi-styles@^4.0.0, ansi-styles@^4.1.0:
   dependencies:
     color-convert "^2.0.1"
 
+any-promise@^1.0.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/any-promise/-/any-promise-1.3.0.tgz#abc6afeedcea52e809cdc0376aed3ce39635d17f"
+  integrity sha1-q8av7tzqUugJzcA3au0845Y10X8=
+
 anymatch@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-2.0.0.tgz#bcb24b4f37934d9aa7ac17b4adaf89e7c76ef2eb"
@@ -1804,6 +1809,11 @@ commander@^2.20.0, commander@^2.7.1:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
   integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
 
+commander@^4.0.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-4.1.1.tgz#9fd602bd936294e9e9ef46a3f4d6964044b18068"
+  integrity sha512-NOKm8xhkzAjzFx8B2v5OAHT+u5pRQc2UCa2Vq9jYL/31o2wi9mxBA7LIFs3sV5VSC49z6pEhfbMULvShKj26WA==
+
 commander@^6.2.0:
   version "6.2.1"
   resolved "https://registry.yarnpkg.com/commander/-/commander-6.2.1.tgz#0792eb682dfbc325999bb2b84fddddba110ac73c"
@@ -3133,7 +3143,7 @@ glob-parent@^5.0.0, glob-parent@^5.1.0, glob-parent@~5.1.0:
   dependencies:
     is-glob "^4.0.1"
 
-glob@^7.0.0, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, glob@^7.1.6:
+glob@7.1.6, glob@^7.0.0, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, glob@^7.1.6:
   version "7.1.6"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.6.tgz#141f33b81a7c2492e125594307480c46679278a6"
   integrity sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==
@@ -4962,6 +4972,15 @@ ms@2.1.2:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
   integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
 
+mz@^2.7.0:
+  version "2.7.0"
+  resolved "https://registry.yarnpkg.com/mz/-/mz-2.7.0.tgz#95008057a56cafadc2bc63dde7f9ff6955948e32"
+  integrity sha512-z81GNO7nnYMEhrGh9LeymoE4+Yr0Wn5McHIZMK5cfQCl+NDX08sCZgUc9/6MHni9IWuFLm1Z3HTCXu2z9fN62Q==
+  dependencies:
+    any-promise "^1.0.0"
+    object-assign "^4.0.1"
+    thenify-all "^1.0.0"
+
 nanoid@^3.1.23:
   version "3.1.23"
   resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.23.tgz#f744086ce7c2bc47ee0a8472574d5c78e4183a81"
@@ -6784,6 +6803,18 @@ strip-json-comments@~2.0.1:
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-2.0.1.tgz#3c531942e908c2697c0ec344858c286c7ca0a60a"
   integrity sha1-PFMZQukIwml8DsNEhYwobHygpgo=
 
+sucrase@^3.19.0:
+  version "3.19.0"
+  resolved "https://registry.yarnpkg.com/sucrase/-/sucrase-3.19.0.tgz#cc9a60f731e7497766a7b710d3362260a8f9ced5"
+  integrity sha512-FeMelydANPRMiOo/lxbf7NxN8bQmMVBQmKOa69BifwVhteMJzRoJNHaVBoCYmE/kpnx6VPg9ckaLumwtuAzmEA==
+  dependencies:
+    commander "^4.0.0"
+    glob "7.1.6"
+    lines-and-columns "^1.1.6"
+    mz "^2.7.0"
+    pirates "^4.0.1"
+    ts-interface-checker "^0.1.9"
+
 supports-color@^5.3.0:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
@@ -6877,6 +6908,20 @@ text-table@^0.2.0:
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
   integrity sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=
 
+thenify-all@^1.0.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/thenify-all/-/thenify-all-1.6.0.tgz#1a1918d402d8fc3f98fbf234db0bcc8cc10e9726"
+  integrity sha1-GhkY1ALY/D+Y+/I02wvMjMEOlyY=
+  dependencies:
+    thenify ">= 3.1.0 < 4"
+
+"thenify@>= 3.1.0 < 4":
+  version "3.3.1"
+  resolved "https://registry.yarnpkg.com/thenify/-/thenify-3.3.1.tgz#8932e686a4066038a016dd9e2ca46add9838a95f"
+  integrity sha512-RVZSIV5IG10Hk3enotrhvz0T9em6cyHBLkH/YAZuKqd8hRkKhSfCGIcP2KUY0EPxndzANBmNllzWPwak+bheSw==
+  dependencies:
+    any-promise "^1.0.0"
+
 throat@^5.0.0:
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/throat/-/throat-5.0.0.tgz#c5199235803aad18754a667d659b5e72ce16764b"
@@ -6998,6 +7043,11 @@ trim-off-newlines@^1.0.0:
   resolved "https://registry.yarnpkg.com/trim-off-newlines/-/trim-off-newlines-1.0.1.tgz#9f9ba9d9efa8764c387698bcbfeb2c848f11adb3"
   integrity sha1-n5up2e+odkw4dpi8v+sshI8RrbM=
 
+ts-interface-checker@^0.1.9:
+  version "0.1.13"
+  resolved "https://registry.yarnpkg.com/ts-interface-checker/-/ts-interface-checker-0.1.13.tgz#784fd3d679722bc103b1b4b8030bcddb5db2a699"
+  integrity sha512-Y/arvbn+rrz3JCKl9C4kVNfTfSm2/mEp5FSz5EsZSANGPSlQrpRI5M4PKF+mJnE52jOO90PnPSc3Ur3bTQw0gA==
+
 ts-jest@^26.2.0:
   version "26.5.5"
   resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-26.5.5.tgz#e40481b6ee4dd162626ba481a2be05fa57160ea5"