fix(Popover): failed to compile

package.json

@@ -55,6 +55,7 @@
   "dependencies": {
     "@babel/runtime": "7.x",
     "@vant/icons": "1.4.0",
+    "@vant/popperjs": "^1.0.0",
     "@vue/babel-helper-vue-jsx-merge-props": "^1.0.0",
     "vue-lazyload": "1.2.3"
   },

packages/vant-popperjs/package.json

@@ -5,7 +5,8 @@
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "publishConfig": {
-    "access": "public"
+    "access": "public",
+    "registry": "https://registry.npmjs.org/"
   },
   "scripts": {
     "dev": "rollup --config rollup.config.js --watch",

src/popover/index.js

@@ -1,6 +1,4 @@
-import { createPopper } from '@popperjs/core/lib/popper-lite';
-import offsetModifier from '@popperjs/core/lib/modifiers/offset';
-import extendsHelper from '@babel/runtime/helpers/esm/extends';
+import { createPopper, offsetModifier } from '@vant/popperjs';
 import { createNamespace } from '../utils';
 import { BORDER_BOTTOM } from '../utils/constant';
 
@@ -11,13 +9,6 @@ import { ClickOutsideMixin } from '../mixins/click-outside';
 import Icon from '../icon';
 import Popup from '../popup';
 
-// add Object.assign polyfill for popper.js
-// see: https://popper.js.org/docs/v2/browser-support/
-/* istanbul ignore if */
-if (!Object.assign) {
-  Object.assign = extendsHelper;
-}
-
 const [createComponent, bem] = createNamespace('popover');
 
 export default createComponent({

yarn.lock

@@ -2107,6 +2107,13 @@
     fast-glob "^3.2.2"
     fs-extra "^9.0.0"
 
+"@vant/popperjs@^1.0.0":
+  version "1.0.0"
+  resolved "https://registry.npmjs.org/@vant/popperjs/-/popperjs-1.0.0.tgz#2d66ab4b8e275c98fb82f5efd43fdd47964d11f2"
+  integrity sha512-2OAl3URmH37OOATcKuT8iuZozoZVNMc8iLLZvurWZqHlWlAojsDHm7lQ2OKlAV4jlxbiFJt0en6DY+WlxHvN9w==
+  dependencies:
+    "@popperjs/core" "^2.5.4"
+
 "@vant/stylelint-config@^1.3.0":
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/@vant/stylelint-config/-/stylelint-config-1.3.0.tgz#702cb87a8698185904aea56ada967064e6821aa4"