From f29b0e02d739aebb2274a98691ae5556f9613217 Mon Sep 17 00:00:00 2001
From: SukkaW <isukkaw@gmail.com>
Date: Thu, 30 Jun 2022 10:07:56 +0800
Subject: [PATCH] chore: enable swc externalHelpers when pre-compile

---
 packages/next/taskfile-swc.js | 8 ++++++--
 packages/next/taskfile.js     | 2 ++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/packages/next/taskfile-swc.js b/packages/next/taskfile-swc.js
index 52e2ce34ccaa7..f7e8478798cb0 100644
--- a/packages/next/taskfile-swc.js
+++ b/packages/next/taskfile-swc.js
@@ -25,6 +25,7 @@ module.exports = function (task) {
 
       const isClient = serverOrClient === 'client'
 
+      /** @type {import('@swc/core').Options} */
       const swcClientOptions = {
         module: {
           type: 'commonjs',
@@ -32,7 +33,7 @@ module.exports = function (task) {
         },
         jsc: {
           loose: true,
-
+          externalHelpers: true,
           target: 'es2016',
           parser: {
             syntax: 'typescript',
@@ -55,6 +56,7 @@ module.exports = function (task) {
         },
       }
 
+      /** @type {import('@swc/core').Options} */
       const swcServerOptions = {
         module: {
           type: 'commonjs',
@@ -67,7 +69,9 @@ module.exports = function (task) {
         },
         jsc: {
           loose: true,
-
+          // Do not enable external helpers on server-side files build
+          // _is_native_funtion helper is not compatible with edge runtime (need investigate)
+          externalHelpers: false,
           parser: {
             syntax: 'typescript',
             dynamicImport: true,
diff --git a/packages/next/taskfile.js b/packages/next/taskfile.js
index fa8f54b68e711..baaba84ed31b6 100644
--- a/packages/next/taskfile.js
+++ b/packages/next/taskfile.js
@@ -95,6 +95,8 @@ const externals = {
 
   'terser-webpack-plugin':
     'next/dist/build/webpack/plugins/terser-webpack-plugin',
+
+  // TODO: Add @swc/helpers to externals once @vercel/ncc switch to swc-loader
 }
 // eslint-disable-next-line camelcase
 externals['node-html-parser'] = 'next/dist/compiled/node-html-parser'