From 7bc02d7f226bfafe33777c9ab536fa35f0a5e945 Mon Sep 17 00:00:00 2001
From: EGOIST <0x142857@gmail.com>
Date: Thu, 18 Nov 2021 11:34:50 +0800
Subject: [PATCH] fix: resolve `module` field before `main` field

---
 src/cli-main.ts | 3 +++
 src/index.ts    | 8 +++++++-
 src/options.ts  | 5 +++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/cli-main.ts b/src/cli-main.ts
index ce9fc402..07219bb7 100644
--- a/src/cli-main.ts
+++ b/src/cli-main.ts
@@ -77,6 +77,9 @@ export async function main(options: Options = {}) {
     )
     .option('--pure <express>', 'Mark specific expressions as pure')
     .option('--metafile', 'Emit esbuild metafile (a JSON file)')
+    .option('--platform <platform>', 'Target platform', {
+      default: 'node',
+    })
     .action(async (files: string[], flags) => {
       const { build } = await import('.')
       Object.assign(options, {
diff --git a/src/index.ts b/src/index.ts
index e62fb57b..b1fb4939 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -99,12 +99,14 @@ export async function runEsbuild(
       ? options.splitting
       : format === 'esm'
 
+  const platform = options.platform || 'node'
+
   try {
     result = await esbuild({
       entryPoints: options.entryPoints,
       format: format === 'cjs' && splitting ? 'esm' : format,
       bundle: typeof options.bundle === 'undefined' ? true : options.bundle,
-      platform: 'node',
+      platform,
       globalName: options.globalName,
       jsxFactory: options.jsxFactory,
       jsxFragment: options.jsxFragment,
@@ -112,6 +114,10 @@ export async function runEsbuild(
       target: options.target === 'es5' ? 'es2016' : options.target,
       footer: options.footer,
       banner: options.banner,
+      mainFields:
+        platform === 'node'
+          ? ['module', 'main']
+          : ['browser', 'module', 'main'],
       plugins: [
         {
           name: 'modify-options',
diff --git a/src/options.ts b/src/options.ts
index 9df7e547..3c974a21 100644
--- a/src/options.ts
+++ b/src/options.ts
@@ -96,4 +96,9 @@ export type Options = {
   metafile?: boolean
   footer?: BuildOptions['footer']
   banner?: BuildOptions['banner']
+  /**
+   * Target platform
+   * @default `node`
+   */
+  platform?: 'node' | 'browser'
 }