diff --git a/common/src/errors/mod.rs b/common/src/errors/mod.rs
index 0317660b450..1d72ec66632 100644
--- a/common/src/errors/mod.rs
+++ b/common/src/errors/mod.rs
@@ -13,8 +13,8 @@ pub use self::{
     diagnostic_builder::DiagnosticBuilder,
     emitter::ColorConfig,
 };
+pub use self::emitter::{Emitter,EmitterWriter};
 use self::{
-    emitter::{Emitter, EmitterWriter},
     Level::*,
 };
 use crate::{
diff --git a/ecmascript/transforms/src/compat/es2015/classes/mod.rs b/ecmascript/transforms/src/compat/es2015/classes/mod.rs
index 0c9b6e348f1..ca6607e6918 100644
--- a/ecmascript/transforms/src/compat/es2015/classes/mod.rs
+++ b/ecmascript/transforms/src/compat/es2015/classes/mod.rs
@@ -387,7 +387,6 @@ impl Classes {
             }
 
             // inject _classCallCheck(this, Bar);
-            helper!(class_call_check);
             inject_class_call_check(&mut constructor, class_name.clone());
             let mut body = constructor.body.unwrap().stmts;
             // should we insert `var _this`?
@@ -628,6 +627,7 @@ impl Classes {
             methods: ExprOrSpread,
             static_methods: Option<ExprOrSpread>,
         ) -> Stmt {
+            helper!(create_class);
             Stmt::Expr(box Expr::Call(CallExpr {
                 span: DUMMY_SP,
                 callee: quote_ident!("_createClass").as_callee(),
@@ -729,7 +729,6 @@ impl Classes {
         if props.is_empty() && static_props.is_empty() {
             return vec![];
         }
-        helper!(create_class);
         vec![mk_create_class_call(
             class_name,
             mk_arg_obj_for_create_class(props),
@@ -759,6 +758,7 @@ fn get_prototype_of(obj: &Expr) -> Expr {
 }
 
 fn inject_class_call_check(c: &mut Constructor, name: Ident) {
+    helper!(class_call_check);
     let class_call_check = Stmt::Expr(box Expr::Call(CallExpr {
         span: DUMMY_SP,
         callee: Expr::Ident(quote_ident!("_classCallCheck")).as_callee(),
diff --git a/ecmascript/transforms/src/compat/es2015/classes/super_field.rs b/ecmascript/transforms/src/compat/es2015/classes/super_field.rs
index da49ce85708..d17b4ad9eb0 100644
--- a/ecmascript/transforms/src/compat/es2015/classes/super_field.rs
+++ b/ecmascript/transforms/src/compat/es2015/classes/super_field.rs
@@ -174,6 +174,7 @@ impl<'a> Fold<Expr> for SuperCalleeFolder<'a> {
 impl<'a> SuperCalleeFolder<'a> {
     fn super_to_get_call(&mut self, super_token: Span, prop: Box<Expr>, computed: bool) -> Expr {
         self.inject_get = true;
+        helper!(get);
 
         let proto_arg = get_prototype_of(&if self.is_static {
             // Foo
@@ -231,6 +232,7 @@ impl<'a> SuperCalleeFolder<'a> {
         rhs: Box<Expr>,
     ) -> Expr {
         self.inject_set = true;
+        helper!(set);
 
         let mut ref_ident = alias_ident_for(&rhs, "_ref");
         ref_ident.span = ref_ident.span.apply_mark(Mark::fresh(Mark::root()));
@@ -416,8 +418,6 @@ impl<'a> Fold<Expr> for SuperFieldAccessFolder<'a> {
         }
 
         if callee_folder.inject_get {
-            helper!(get);
-
             if should_invoke_call {
                 match n {
                     Expr::Call(CallExpr {
@@ -470,10 +470,6 @@ impl<'a> Fold<Expr> for SuperFieldAccessFolder<'a> {
             }
         }
 
-        if callee_folder.inject_set {
-            helper!(set);
-        }
-
         n.fold_children(self)
     }
 }
diff --git a/ecmascript/transforms/src/compat/es2015/computed_props/mod.rs b/ecmascript/transforms/src/compat/es2015/computed_props/mod.rs
index 04db9fa5db5..5ff94efa250 100644
--- a/ecmascript/transforms/src/compat/es2015/computed_props/mod.rs
+++ b/ecmascript/transforms/src/compat/es2015/computed_props/mod.rs
@@ -193,6 +193,7 @@ impl Fold<Expr> for ObjectLitFolder {
                     };
 
                     if props_cnt == 1 {
+                        helper!(define_property);
                         return Expr::Call(CallExpr {
                             span,
                             callee: quote_ident!("_defineProperty").as_callee(),
@@ -208,6 +209,7 @@ impl Fold<Expr> for ObjectLitFolder {
                             type_args: Default::default(),
                         });
                     }
+                    helper!(define_property);
                     exprs.push(box Expr::Call(CallExpr {
                         span,
                         callee: quote_ident!("_defineProperty").as_callee(),
@@ -232,6 +234,7 @@ impl Fold<Expr> for ObjectLitFolder {
                         })),
                         definite: false,
                     });
+                    helper!(define_enumerable_properties);
                     exprs.push(box Expr::Call(CallExpr {
                         span,
                         callee: quote_ident!("_defineEnumerableProperties").as_callee(),
diff --git a/ecmascript/transforms/src/compat/es2017/async_to_generator/mod.rs b/ecmascript/transforms/src/compat/es2017/async_to_generator/mod.rs
index 77da678e47e..beda98e4434 100644
--- a/ecmascript/transforms/src/compat/es2017/async_to_generator/mod.rs
+++ b/ecmascript/transforms/src/compat/es2017/async_to_generator/mod.rs
@@ -611,7 +611,6 @@ fn make_fn_ref(mut expr: FnExpr) -> Expr {
     expr.function.is_generator = true;
 
     let span = expr.span();
-    helper!(async_to_generator);
 
     let contains_this = contains_this_expr(&expr.function.body);
     let expr = if contains_this {
@@ -625,6 +624,7 @@ fn make_fn_ref(mut expr: FnExpr) -> Expr {
         Expr::Fn(expr)
     };
 
+    helper!(async_to_generator);
     Expr::Call(CallExpr {
         span,
         callee: quote_ident!("_asyncToGenerator").as_callee(),
diff --git a/ecmascript/transforms/src/compat/es3/member_expr_lits.rs b/ecmascript/transforms/src/compat/es3/member_expr_lits.rs
index 6582310e6e6..a0339dc3d75 100644
--- a/ecmascript/transforms/src/compat/es3/member_expr_lits.rs
+++ b/ecmascript/transforms/src/compat/es3/member_expr_lits.rs
@@ -30,7 +30,7 @@ impl Fold<MemberExpr> for MemberExprLit {
                 value: sym, span, ..
             }))
             | Expr::Ident(Ident { sym, span, .. }) => {
-                if sym.is_reserved_for_es3() {
+                if sym.is_reserved_for_es3() || sym.contains("-") || sym.contains(".") {
                     return MemberExpr {
                         computed: true,
                         prop: box Expr::Lit(Lit::Str(Str {
diff --git a/ecmascript/transforms/src/compat/es3/prop_lits.rs b/ecmascript/transforms/src/compat/es3/prop_lits.rs
index 71b571d14ed..88bcaa19aae 100644
--- a/ecmascript/transforms/src/compat/es3/prop_lits.rs
+++ b/ecmascript/transforms/src/compat/es3/prop_lits.rs
@@ -39,7 +39,7 @@ impl Fold<PropName> for PropertyLiteral {
             PropName::Str(Str {
                 value: sym, span, ..
             }) => {
-                if sym.is_reserved_for_es3() || sym.contains('-') {
+                if sym.is_reserved_for_es3() || sym.contains('-') || sym.contains('.') {
                     return PropName::Str(Str {
                         span,
                         value: sym,
@@ -51,7 +51,7 @@ impl Fold<PropName> for PropertyLiteral {
             }
             PropName::Ident(i) => {
                 let Ident { sym, span, .. } = i;
-                if sym.is_reserved_for_es3() || sym.contains('-') {
+                if sym.is_reserved_for_es3() || sym.contains('-') || sym.contains('.') {
                     return PropName::Str(Str {
                         span,
                         value: sym,
@@ -95,4 +95,19 @@ mod tests {
         ok_if_code_eq
     );
 
+    test!(
+        ::swc_ecma_parser::Syntax::default(),
+        |_| PropertyLiteral,
+        str_lit,
+        r#"'use strict';
+var x = {
+    'foo.bar': true
+};"#,
+        r#"'use strict';
+var x = {
+    'foo.bar': true
+};"#,
+        ok_if_code_eq
+    );
+
 }
diff --git a/ecmascript/transforms/src/fixer.rs b/ecmascript/transforms/src/fixer.rs
index 06915944058..da0622412e5 100644
--- a/ecmascript/transforms/src/fixer.rs
+++ b/ecmascript/transforms/src/fixer.rs
@@ -440,4 +440,6 @@ const _ref = {}, { c =( _tmp = {}, d = _extends({}, _tmp), _tmp)  } = _ref;"
     identical!(regression_10, "({x} = { x: 1 }), exports.x = x;");
 
     identical!(regression_11, "(void 0).foo();");
+
+    identical!(regression_12,  "(function{})()");
 }
diff --git a/ecmascript/transforms/src/modules/umd/config.rs b/ecmascript/transforms/src/modules/umd/config.rs
index b55633cca37..b216ce4fff4 100644
--- a/ecmascript/transforms/src/modules/umd/config.rs
+++ b/ecmascript/transforms/src/modules/umd/config.rs
@@ -13,6 +13,7 @@ use swc_ecma_parser::{Parser, Session, SourceFileInput, Syntax};
 #[derive(Default, Clone, Serialize, Deserialize)]
 #[serde(deny_unknown_fields, rename_all = "camelCase")]
 pub struct Config {
+    #[serde(default)]
     pub globals: FxHashMap<String, String>,
 }
 
diff --git a/ecmascript/transforms/src/modules/umd/mod.rs b/ecmascript/transforms/src/modules/umd/mod.rs
index 46ce587b013..797910f39bb 100644
--- a/ecmascript/transforms/src/modules/umd/mod.rs
+++ b/ecmascript/transforms/src/modules/umd/mod.rs
@@ -440,16 +440,13 @@ impl Fold<Module> for Umd {
 
                 match ty {
                     Some(&wildcard) => {
-                        if wildcard {
-                            helper!(interop_require_wildcard);
-                        } else {
-                            helper!(interop_require_default);
-                        }
                         let right = box Expr::Call(CallExpr {
                             span: DUMMY_SP,
                             callee: if wildcard {
+                                helper!(interop_require_wildcard);
                                 quote_ident!("_interopRequireWildcard").as_callee()
                             } else {
+                                helper!(interop_require_default);
                                 quote_ident!("_interopRequireDefault").as_callee()
                             },
                             args: vec![ident.clone().as_arg()],
@@ -619,6 +616,7 @@ impl Fold<Module> for Umd {
                     ident: None,
                     function: helper_fn,
                 }
+                .wrap_with_paren()
                 .as_callee(),
                 args: vec![ThisExpr { span: DUMMY_SP }.as_arg(), factory_arg],
                 type_args: Default::default(),
diff --git a/ecmascript/transforms/src/proposals/decorators/mod.rs b/ecmascript/transforms/src/proposals/decorators/mod.rs
index 557746f4a6a..f36d30d06a7 100644
--- a/ecmascript/transforms/src/proposals/decorators/mod.rs
+++ b/ecmascript/transforms/src/proposals/decorators/mod.rs
@@ -462,7 +462,6 @@ impl Decorators {
             .map(Some)
             .collect();
 
-        helper!(decorate);
         let decorate_call = Expr::Call(make_decorate_call(
             class.decorators,
             iter::once({
@@ -539,6 +538,8 @@ fn make_decorate_call(
     decorators: Vec<Decorator>,
     args: impl Iterator<Item = ExprOrSpread>,
 ) -> CallExpr {
+    helper!(decorate);
+
     CallExpr {
         span: DUMMY_SP,
         callee: quote_ident!("_decorate").as_callee(),