perf(cli): disable enableObjectSlots by default

packages/vant-cli/package.json

@@ -53,7 +53,7 @@
     "@vant/markdown-vetur": "^2.0.2",
     "@vant/stylelint-config": "^1.4.2",
     "@vant/touch-emulator": "^1.2.0",
-    "@vue/babel-plugin-jsx": "^1.0.0",
+    "@vue/babel-plugin-jsx": "^1.0.1",
     "@vue/test-utils": "2.0.0-beta.10",
     "address": "^1.1.2",
     "autoprefixer": "^9.0.0",

packages/vant-cli/src/config/babel.config.ts

@@ -2,6 +2,7 @@ import { ConfigAPI } from '@babel/core';
 
 type PresetOption = {
   loose?: boolean;
+  enableObjectSlots?: boolean;
 };
 
 module.exports = function (api?: ConfigAPI, options: PresetOption = {}) {
@@ -42,7 +43,12 @@ module.exports = function (api?: ConfigAPI, options: PresetOption = {}) {
         },
         'vant',
       ],
-      '@vue/babel-plugin-jsx',
+      [
+        '@vue/babel-plugin-jsx',
+        {
+          enableObjectSlots: options.enableObjectSlots,
+        },
+      ],
       '@babel/plugin-transform-object-assign',
     ],
   };