feat(@vant/cli): vant config become esm

packages/vant-cli/src/common/constant.ts

@@ -5,7 +5,7 @@ import { fileURLToPath } from 'url';
 import { join, dirname, isAbsolute } from 'path';
 
 function findRootDir(dir: string): string {
-  if (existsSync(join(dir, 'vant.config.js'))) {
+  if (existsSync(join(dir, 'vant.config.mjs'))) {
     return dir;
   }
 
@@ -25,7 +25,7 @@ export const LIB_DIR = join(ROOT, 'lib');
 export const DOCS_DIR = join(ROOT, 'docs');
 export const VETUR_DIR = join(ROOT, 'vetur');
 export const SITE_DIST_DIR = join(ROOT, 'site-dist');
-export const VANT_CONFIG_FILE = join(ROOT, 'vant.config.js');
+export const VANT_CONFIG_FILE = join(ROOT, 'vant.config.mjs');
 export const PACKAGE_JSON_FILE = join(ROOT, 'package.json');
 
 // Relative paths
@@ -57,17 +57,23 @@ export function getPackageJson() {
   return JSON.parse(rawJson);
 }
 
-export function getVantConfig() {
+async function getVantConfigAsync() {
   const require = createRequire(import.meta.url);
   delete require.cache[VANT_CONFIG_FILE];
 
   try {
-    return require(VANT_CONFIG_FILE);
+    return (await import(VANT_CONFIG_FILE)).default;
   } catch (err) {
     return {};
   }
 }
 
+const vantConfig = await getVantConfigAsync();
+
+export function getVantConfig() {
+  return vantConfig;
+}
+
 function getSrcDir() {
   const vantConfig = getVantConfig();
   const srcDir = get(vantConfig, 'build.srcDir');