feat(resolve)!: allow removing conditions

docs/config/shared-options.md

@@ -117,6 +117,7 @@ For SSR builds, deduplication does not work for ESM build outputs configured fro
 ## resolve.conditions
 
 - **Type:** `string[]`
+- **Default:** `['module', 'browser', 'node', 'production', 'development']`
 
 Additional allowed conditions when resolving [Conditional Exports](https://nodejs.org/api/packages.html#packages_conditional_exports) from a package.
 
@@ -135,7 +136,9 @@ A package with conditional exports may have the following `exports` field in its
 
 Here, `import` and `require` are "conditions". Conditions can be nested and should be specified from most specific to least specific.
 
-Vite has a list of "allowed conditions" and will match the first condition that is in the allowed list. The default allowed conditions are: `import`, `module`, `browser`, `default`, and `production/development` based on current mode. The `resolve.conditions` config option allows specifying additional allowed conditions.
+Some of the default conditions (`production`, `development`) are only applied when the requirements are met. For example, `production` is only applied when `process.env.NODE_ENV === 'production'`. The `resolve.conditions` config option allows specifying additional allowed conditions and those conditions will be applied unconditionally.
+
+Note that `import`, `require`, `default` conditions are always applied if the requirements are met.
 
 :::warning Resolving subpath exports
 Export keys ending with "/" is deprecated by Node and may not work well. Please contact the package author to use [`*` subpath patterns](https://nodejs.org/api/packages.html#package-entry-points) instead.

docs/config/ssr-options.md

@@ -43,6 +43,6 @@ These conditions are used in the plugin pipeline, and only affect non-externaliz
 ## ssr.resolve.externalConditions
 
 - **Type:** `string[]`
-- **Default:** `[]`
+- **Default:** `['node']`
 
 Conditions that are used during ssr import (including `ssrLoadModule`) of externalized dependencies.

docs/guide/migration.md

@@ -12,6 +12,24 @@ The experimental Vite Runtime API evolved into the Module Runner API, released i
 
 ## General Changes
 
+### Default value for `resolve.conditions`
+
+This change does not affect users that did not configure [`resolve.conditions`](/config/shared-options#resolve-conditions) / [`ssr.resolve.conditions`](/config/ssr-options#ssr-resolve-conditions) / [`ssr.resolve.externalConditions`](/config/ssr-options#ssr-resolve-externalconditions).
+
+In Vite 5, the default value for `resolve.conditions` was `[]` and some conditions were added internally.
+
+From Vite 6, some of the conditions are no longer added internally and need to be included in the config values.
+The conditions that are no longer added internally for
+
+- `resolve.conditions` are `['module', 'browser', 'production', 'development']`
+- `ssr.resolve.conditions` are `['module', 'node', 'production', 'development']`
+  For example, if you previously specified:
+
+The default values for those options are updated to the corresponding values.
+
+If you specified a custom value for `resolve.conditions` or `ssr.resolve.conditions`, you need to update it to include the new conditions.
+For example, if you previously specified `['custom']` for `resolve.conditions`, you need to specify `['custom', 'module', 'browser', 'production', 'development']` instead.
+
 ### JSON stringify
 
 In Vite 5, when [`json.stringify: true`](/config/shared-options#json-stringify) is set, [`json.namedExports`](/config/shared-options#json-namedexports) was disabled.

packages/vite/src/node/__tests__/environment.spec.ts

@@ -21,7 +21,7 @@ describe('custom environment conditions', () => {
         ws: false,
       },
       environments: {
-        // no web / default
+        // default
         ssr: {
           resolve: {
             noExternal,
@@ -36,9 +36,8 @@ describe('custom environment conditions', () => {
             },
           },
         },
-        // web / worker
+        // worker
         worker: {
-          webCompatible: true,
           resolve: {
             noExternal,
             conditions: ['worker'],
@@ -54,9 +53,8 @@ describe('custom environment conditions', () => {
             },
           },
         },
-        // web / custom1
+        // custom1
         custom1: {
-          webCompatible: true,
           resolve: {
             noExternal,
             conditions: ['custom1'],
@@ -72,54 +70,17 @@ describe('custom environment conditions', () => {
             },
           },
         },
-        // no web / custom2
-        custom2: {
-          webCompatible: false,
+        // same as custom1
+        custom1_2: {
           resolve: {
             noExternal,
-            conditions: ['custom2'],
-            externalConditions: ['custom2'],
-          },
-          build: {
-            outDir: path.join(
-              import.meta.dirname,
-              'fixtures/test-dep-conditions/dist/custom2',
-            ),
-            rollupOptions: {
-              input: { index: '@vitejs/test-dep-conditions' },
-            },
-          },
-        },
-        // no web / custom3
-        custom3: {
-          webCompatible: false,
-          resolve: {
-            noExternal,
-            conditions: ['custom3'],
-            externalConditions: ['custom3'],
-          },
-          build: {
-            outDir: path.join(
-              import.meta.dirname,
-              'fixtures/test-dep-conditions/dist/custom3',
-            ),
-            rollupOptions: {
-              input: { index: '@vitejs/test-dep-conditions' },
-            },
-          },
-        },
-        // same as custom3
-        custom3_2: {
-          webCompatible: false,
-          resolve: {
-            noExternal,
-            conditions: ['custom3'],
-            externalConditions: ['custom3'],
+            conditions: ['custom1'],
+            externalConditions: ['custom1'],
           },
           build: {
             outDir: path.join(
               import.meta.dirname,
-              'fixtures/test-dep-conditions/dist/custom3_2',
+              'fixtures/test-dep-conditions/dist/custom1_2',
             ),
             rollupOptions: {
               input: { index: '@vitejs/test-dep-conditions' },
@@ -135,14 +96,7 @@ describe('custom environment conditions', () => {
     onTestFinished(() => server.close())
 
     const results: Record<string, unknown> = {}
-    for (const key of [
-      'ssr',
-      'worker',
-      'custom1',
-      'custom2',
-      'custom3',
-      'custom3_2',
-    ]) {
+    for (const key of ['ssr', 'worker', 'custom1', 'custom1_2']) {
       const runner = createServerModuleRunner(server.environments[key], {
         hmr: {
           logger: false,
@@ -155,9 +109,7 @@ describe('custom environment conditions', () => {
     expect(results).toMatchInlineSnapshot(`
       {
         "custom1": "index.custom1.js",
-        "custom2": "index.custom2.js",
-        "custom3": "index.custom3.js",
-        "custom3_2": "index.custom3.js",
+        "custom1_2": "index.custom1.js",
         "ssr": "index.default.js",
         "worker": "index.worker.js",
       }
@@ -169,14 +121,7 @@ describe('custom environment conditions', () => {
     onTestFinished(() => server.close())
 
     const results: Record<string, unknown> = {}
-    for (const key of [
-      'ssr',
-      'worker',
-      'custom1',
-      'custom2',
-      'custom3',
-      'custom3_2',
-    ]) {
+    for (const key of ['ssr', 'worker', 'custom1', 'custom1_2']) {
       const runner = createServerModuleRunner(server.environments[key], {
         hmr: {
           logger: false,
@@ -191,9 +136,7 @@ describe('custom environment conditions', () => {
     expect(results).toMatchInlineSnapshot(`
       {
         "custom1": "index.custom1.js",
-        "custom2": "index.custom2.js",
-        "custom3": "index.custom3.js",
-        "custom3_2": "index.custom3.js",
+        "custom1_2": "index.custom1.js",
         "ssr": "index.default.js",
         "worker": "index.worker.js",
       }
@@ -222,14 +165,7 @@ describe('custom environment conditions', () => {
   test('build', async () => {
     const builder = await createBuilder(getConfig({ noExternal: true }))
     const results: Record<string, unknown> = {}
-    for (const key of [
-      'ssr',
-      'worker',
-      'custom1',
-      'custom2',
-      'custom3',
-      'custom3_2',
-    ]) {
+    for (const key of ['ssr', 'worker', 'custom1', 'custom1_2']) {
       const output = await builder.build(builder.environments[key])
       const chunk = (output as RollupOutput).output[0]
       const mod = await import(
@@ -245,9 +181,7 @@ describe('custom environment conditions', () => {
     expect(results).toMatchInlineSnapshot(`
       {
         "custom1": "index.custom1.js",
-        "custom2": "index.custom2.js",
-        "custom3": "index.custom3.js",
-        "custom3_2": "index.custom3.js",
+        "custom1_2": "index.custom1.js",
         "ssr": "index.default.js",
         "worker": "index.worker.js",
       }

packages/vite/src/node/__tests__/fixtures/test-dep-conditions/package.json

@@ -6,8 +6,6 @@
     ".": {
       "style": "./index.css",
       "custom1": "./index.custom1.js",
-      "custom2": "./index.custom2.js",
-      "custom3": "./index.custom3.js",
       "worker": "./index.worker.js",
       "browser": "./index.browser.js",
       "default": "./index.default.js"

packages/vite/src/node/baseEnvironment.ts

@@ -17,7 +17,6 @@ export function getDefaultResolvedEnvironmentOptions(
     define: config.define,
     resolve: config.resolve,
     consumer: 'server',
-    webCompatible: false,
     optimizeDeps: config.optimizeDeps,
     dev: config.dev,
     build: config.build,

packages/vite/src/node/build.ts

@@ -341,6 +341,8 @@ export function resolveBuildEnvironmentOptions(
   raw: BuildEnvironmentOptions,
   logger: Logger,
   consumer: 'client' | 'server' | undefined,
+  // Backward compatibility
+  isSsrTargetWebworkerEnvironment?: boolean,
 ): ResolvedBuildEnvironmentOptions {
   const deprecatedPolyfillModulePreload = raw?.polyfillModulePreload
   const { polyfillModulePreload, ...rest } = raw
@@ -437,6 +439,19 @@ export function resolveBuildEnvironmentOptions(
     resolved.cssMinify = consumer === 'server' ? 'esbuild' : !!resolved.minify
   }
 
+  if (isSsrTargetWebworkerEnvironment) {
+    resolved.rollupOptions ??= {}
+    resolved.rollupOptions.output ??= {}
+    const output = resolved.rollupOptions.output
+    for (const out of arraify(output)) {
+      out.entryFileNames ??= `[name].js`
+      out.chunkFileNames ??= `[name]-[hash].js`
+      const input = resolved.rollupOptions.input
+      out.inlineDynamicImports ??=
+        !input || typeof input === 'string' || Object.keys(input).length === 1
+    }
+  }
+
   return resolved
 }
 
@@ -685,7 +700,7 @@ async function buildEnvironment(
 
       const format = output.format || 'es'
       const jsExt =
-        !environment.config.webCompatible || libOptions
+        environment.config.consumer === 'server' || libOptions
           ? resolveOutputJsExtension(
               format,
               findNearestPackageData(root, packageCache)?.data.type,
@@ -723,11 +738,7 @@ async function buildEnvironment(
           ? `[name].[ext]`
           : path.posix.join(options.assetsDir, `[name]-[hash].[ext]`),
         inlineDynamicImports:
-          output.format === 'umd' ||
-          output.format === 'iife' ||
-          (environment.config.consumer === 'server' &&
-            environment.config.webCompatible &&
-            (typeof input === 'string' || Object.keys(input).length === 1)),
+          output.format === 'umd' || output.format === 'iife',
         ...output,
       }
     }