chore: tweaks

src/index.js

@@ -1,13 +1,13 @@
+// 1. find to ExportsModuleDeclaration(`Object.defineProperty(exports, "__esModule", {value: true});`)
+// 2. find to ExportsAssignmentExpression(`exports.default`, `exports.foo` etc)
+// 3. add `module.exports` if exists only `exports.default` assignment
+// The above works after executing `preset-env`(transform-es2015-modules-*) in `Plugin.post`
+
 module.exports = ({template, types}) => {
  let pluginOptions
- const visitor = {
+ const ExportsModuleDeclarationVisitor = {
  CallExpression: {
  exit (path) {
- // Not `Object.defineProperty`, skip
- if (!path.get('callee.object').node) {
- return
- }
-
  if (isExportsModuleDeclaration(path)) {
  const finder = new ExportFinder(path)
 
@@ -33,12 +33,17 @@ module.exports = ({template, types}) => {
  }
  },
  post (fileMap) {
- fileMap.path.traverse(visitor)
+ fileMap.path.traverse(ExportsModuleDeclarationVisitor)
  }
  }
 }
 
 function isExportsModuleDeclaration (path) {
+ // Not `Object.defineProperty`, skip
+ if (!path.get('callee.object').node) {
+ return false
+ }
+
  const callee = `${path.get('callee.object.name').node}.${path.get('callee.property.name').node}`
  const args = path.get('arguments').map(path => {
  if (path.isStringLiteral()) {