feat: make esbuild optional peer dep

packages/vite/package.json

@@ -85,7 +85,6 @@
   },
   "//": "READ CONTRIBUTING.md to understand what to put under deps vs. devDeps!",
   "dependencies": {
-    "esbuild": "^0.24.0",
     "lightningcss": "^1.28.1",
     "postcss": "^8.4.49",
     "rolldown": "0.15.0-snapshot-3cea4f5-20241211003613",
@@ -119,6 +118,7 @@
     "dotenv": "^16.4.5",
     "dotenv-expand": "^12.0.1",
     "es-module-lexer": "^1.5.4",
+    "esbuild": "^0.24.0",
     "escape-html": "^1.0.3",
     "estree-walker": "^3.0.3",
     "etag": "^1.8.1",
@@ -155,6 +155,7 @@
   },
   "peerDependencies": {
     "@types/node": "^18.0.0 || ^20.0.0 || >=22.0.0",
+    "esbuild": "^0.24.0",
     "jiti": ">=1.21.0",
     "less": "*",
     "lightningcss": "^1.21.0",
@@ -170,6 +171,9 @@
     "@types/node": {
       "optional": true
     },
+    "esbuild": {
+      "optional": true
+    },
     "jiti": {
       "optional": true
     },

packages/vite/src/node/plugins/esbuild.ts

@@ -6,7 +6,6 @@ import type {
   TransformOptions,
   TransformResult,
 } from 'esbuild'
-import { transform } from 'esbuild'
 import type { RawSourceMap } from '@ampproject/remapping'
 import type { InternalModuleFormat, SourceMap } from 'rolldown'
 import type { TSConfckParseResult } from 'tsconfck'
@@ -75,6 +74,12 @@ type TSConfigJSON = {
 }
 type TSCompilerOptions = NonNullable<TSConfigJSON['compilerOptions']>
 
+let esbuild: Promise<typeof import('esbuild')> | undefined
+const importEsbuild = () => {
+  esbuild ||= import('esbuild')
+  return esbuild
+}
+
 export async function transformWithEsbuild(
   code: string,
   filename: string,
@@ -197,6 +202,7 @@ export async function transformWithEsbuild(
   delete resolvedOptions.jsxInject
 
   try {
+    const { transform } = await importEsbuild()
     const result = await transform(code, resolvedOptions)
     let map: SourceMap
     if (inMap && resolvedOptions.sourcemap) {

packages/vite/src/node/publicUtils.ts

@@ -10,7 +10,6 @@ export {
   DEFAULT_SERVER_CONDITIONS as defaultServerConditions,
   DEFAULT_SERVER_MAIN_FIELDS as defaultServerMainFields,
 } from './constants'
-export { version as esbuildVersion } from 'esbuild'
 export {
   splitVendorChunkPlugin,
   splitVendorChunk,