fix: esm compactiblity

Author: antfu

src/core/identifiers.ts

@@ -1,4 +1,4 @@
-import { PrivateName, Expression, Statement, SpreadElement, Node, TSType } from '@babel/types'
+import type { PrivateName, Expression, Statement, SpreadElement, Node, TSType } from '@babel/types'
 
 export function getIdentifierDeclarations(nodes: Statement[], identifiers = new Set<string>()) {
   for (let node of nodes) {

src/core/macros.ts

@@ -1,6 +1,6 @@
 // modified from https://github.com/vuejs/vue-next/blob/main/packages/compiler-sfc/src/compileScript.ts
 
-import {
+import type {
   Node,
   ObjectExpression,
   TSType,
@@ -11,8 +11,11 @@ import {
   CallExpression,
   TSInterfaceBody,
 } from '@babel/types'
-import { types as t } from '@babel/core'
-import { parseExpression } from '@babel/parser'
+import * as babelCore from '@babel/core'
+import * as babelParser from '@babel/parser'
+
+const { types: t } = babelCore
+const { parseExpression } = babelParser
 
 // Special compiler macros
 const DEFINE_PROPS = 'defineProps'

src/core/transformScriptSetup.ts

@@ -1,12 +1,14 @@
-import { types as t } from '@babel/core'
+import * as babelCore from '@babel/core'
 import { camelize, capitalize } from '@vue/shared'
-import { Node, Statement } from '@babel/types'
+import type { Node, ObjectExpression, Statement } from '@babel/types'
 import generate from '@babel/generator'
 import { partition } from '@antfu/utils'
 import { ParsedSFC, ScriptSetupTransformOptions } from '../types'
 import { applyMacros } from './macros'
 import { getIdentifierDeclarations } from './identifiers'
 
+const { types: t } = babelCore
+
 function isAsyncImport(node: any) {
   if (node.type === 'VariableDeclaration') {
     const declaration = node.declarations[0]
@@ -38,7 +40,7 @@ export function transformScriptSetup(sfc: ParsedSFC, options?: ScriptSetupTransf
   getIdentifierDeclarations(setupBody, declarations)
 
   // filter out identifiers that are used in `<template>`
-  const returns: t.ObjectExpression['properties'] = Array.from(declarations)
+  const returns: ObjectExpression['properties'] = Array.from(declarations)
     .filter(Boolean)
     .filter(i => template.identifiers.has(i))
     .map((i) => {