feat(compiler-core): support browser environment for walkIdentifiers

Author: zhiyuanzmj

packages/compiler-core/src/babelUtils.ts

@@ -29,10 +29,6 @@ export function walkIdentifiers(
   parentStack: Node[] = [],
   knownIds: Record<string, number> = Object.create(null),
 ): void {
-  if (__BROWSER__) {
-    return
-  }
-
   const rootExp =
     root.type === 'Program'
       ? root.body[0].type === 'ExpressionStatement' && root.body[0].expression
@@ -109,10 +105,6 @@ export function isReferencedIdentifier(
   parent: Node | null,
   parentStack: Node[],
 ): boolean {
-  if (__BROWSER__) {
-    return false
-  }
-
   if (!parent) {
     return true
   }