diff --git a/packages/vant-cli/src/commands/build.ts b/packages/vant-cli/src/commands/build.ts
index 824189114..2d5b4588d 100644
--- a/packages/vant-cli/src/commands/build.ts
+++ b/packages/vant-cli/src/commands/build.ts
@@ -1,13 +1,13 @@
 import execa from 'execa';
 import { join, relative } from 'path';
-import { remove, copy, readdirSync, existsSync } from 'fs-extra';
+import { remove, copy, readdir, existsSync } from 'fs-extra';
 import { clean } from './clean';
 import { CSS_LANG } from '../common/css';
 import { ora, consola } from '../common/logger';
 import { installDependencies } from '../common/manager';
-import { compileJs } from '../compiler/compile-js';
 import { compileSfc } from '../compiler/compile-sfc';
 import { compileStyle } from '../compiler/compile-style';
+import { compileScript } from '../compiler/compile-script';
 import { compilePackage } from '../compiler/compile-package';
 import { genPackageEntry } from '../compiler/gen-package-entry';
 import { genStyleDepsMap } from '../compiler/gen-style-deps-map';
@@ -29,27 +29,25 @@ import {
 } from '../common';
 
 async function compileFile(filePath: string) {
-  if (isSfc(filePath)) {
-    return compileSfc(filePath);
-  }
-
   if (isScript(filePath)) {
-    return compileJs(filePath);
+    return compileScript(filePath);
   }
-
   if (isStyle(filePath)) {
     return compileStyle(filePath);
   }
-
   if (isAsset(filePath)) {
     return Promise.resolve();
   }
-
   return remove(filePath);
 }
 
-async function compileDir(dir: string) {
-  const files = readdirSync(dir);
+/**
+ * Pre-compile
+ * 1. Remove unneeded dirs
+ * 2. compile sfc into scripts/styles
+ */
+async function preCompileDir(dir: string) {
+  const files = await readdir(dir);
 
   await Promise.all(
     files.map((filename) => {
@@ -58,19 +56,29 @@ async function compileDir(dir: string) {
       if (isDemoDir(filePath) || isTestDir(filePath)) {
         return remove(filePath);
       }
-
       if (isDir(filePath)) {
-        return compileDir(filePath);
+        return preCompileDir(filePath);
       }
+      if (isSfc(filePath)) {
+        return compileSfc(filePath);
+      }
+      return Promise.resolve();
+    })
+  );
+}
 
-      return compileFile(filePath);
+async function compileDir(dir: string) {
+  const files = await readdir(dir);
+  await Promise.all(
+    files.map((filename) => {
+      const filePath = join(dir, filename);
+      return isDir(filePath) ? compileDir(filePath) : compileFile(filePath);
     })
   );
 }
 
 async function copySourceCode() {
-  await copy(SRC_DIR, ES_DIR);
-  await copy(SRC_DIR, LIB_DIR);
+  return Promise.all([copy(SRC_DIR, ES_DIR), copy(SRC_DIR, LIB_DIR)]);
 }
 
 async function buildESMOutputs() {
@@ -86,6 +94,8 @@ async function buildCJSOutputs() {
 }
 
 async function buildTypeDeclarations() {
+  await Promise.all([preCompileDir(ES_DIR), preCompileDir(LIB_DIR)]);
+
   const tsConfig = join(process.cwd(), 'tsconfig.declaration.json');
 
   if (existsSync(tsConfig)) {
diff --git a/packages/vant-cli/src/compiler/compile-js.ts b/packages/vant-cli/src/compiler/compile-script.ts
similarity index 92%
rename from packages/vant-cli/src/compiler/compile-js.ts
rename to packages/vant-cli/src/compiler/compile-script.ts
index 11e349dad..9d18976f4 100644
--- a/packages/vant-cli/src/compiler/compile-js.ts
+++ b/packages/vant-cli/src/compiler/compile-script.ts
@@ -5,7 +5,7 @@ import { replaceExt } from '../common';
 import { replaceCSSImportExt } from '../common/css';
 import { replaceScriptImportExt } from './get-deps';
 
-export async function compileJs(filePath: string): Promise<void> {
+export async function compileScript(filePath: string): Promise<void> {
   return new Promise((resolve, reject) => {
     if (filePath.includes('.d.ts')) {
       resolve();
diff --git a/packages/vant-cli/src/compiler/compile-sfc.ts b/packages/vant-cli/src/compiler/compile-sfc.ts
index 876276e32..f430712af 100644
--- a/packages/vant-cli/src/compiler/compile-sfc.ts
+++ b/packages/vant-cli/src/compiler/compile-sfc.ts
@@ -1,10 +1,8 @@
 import hash from 'hash-sum';
 import path from 'path';
 import { parse, SFCBlock, compileTemplate } from '@vue/compiler-sfc';
-import { remove, writeFileSync, readFileSync } from 'fs-extra';
+import { remove, readFileSync, outputFile } from 'fs-extra';
 import { replaceExt } from '../common';
-import { compileJs } from './compile-js';
-import { compileStyle } from './compile-style';
 
 const RENDER_FN = '__vue_render__';
 const VUEIDS = '__vue_sfc__';
@@ -78,10 +76,16 @@ export async function compileSfc(filePath: string): Promise<any> {
     const scriptFilePath = replaceExt(filePath, `.${lang}`);
 
     tasks.push(
-      new Promise((resolve, reject) => {
-        let script = descriptor.script!.content;
-        script = injectStyle(script, styles, filePath);
+      new Promise((resolve) => {
+        let script = '';
 
+        // the generated render fn lacks type definitions
+        if (lang === 'ts') {
+          script += '// @ts-nocheck\n';
+        }
+
+        script += descriptor.script!.content;
+        script = injectStyle(script, styles, filePath);
         script = script.replace(EXPORT, `const ${VUEIDS} =`);
 
         if (template) {
@@ -100,15 +104,14 @@ export async function compileSfc(filePath: string): Promise<any> {
 
         script += `\n${EXPORT} ${VUEIDS}`;
 
-        writeFileSync(scriptFilePath, script);
-        compileJs(scriptFilePath).then(resolve).catch(reject);
+        outputFile(scriptFilePath, script).then(resolve);
       })
     );
   }
 
   // compile style part
   tasks.push(
-    ...styles.map((style, index: number) => {
+    ...styles.map(async (style, index: number) => {
       const cssFilePath = getSfcStylePath(filePath, style.lang || 'css', index);
 
       const styleSource = trim(style.content);
@@ -124,9 +127,7 @@ export async function compileSfc(filePath: string): Promise<any> {
       //   }).code;
       // }
 
-      writeFileSync(cssFilePath, styleSource);
-
-      return compileStyle(cssFilePath);
+      return outputFile(cssFilePath, styleSource);
     })
   );