feat: add isSsrTargetWebWorker flag to configEnvironment hook (#1…

…8620)

packages/vite/src/node/config.ts

@@ -747,13 +747,13 @@ function resolveEnvironmentOptions(
   environmentName: string,
   // Backward compatibility
   skipSsrTransform?: boolean,
-  ssrTargetWebworker?: boolean,
+  isSsrTargetWebworkerSet?: boolean,
 ): ResolvedEnvironmentOptions {
   const isClientEnvironment = environmentName === 'client'
   const consumer =
     options.consumer ?? (isClientEnvironment ? 'client' : 'server')
   const isSsrTargetWebworkerEnvironment =
-    ssrTargetWebworker && environmentName === 'ssr'
+    isSsrTargetWebworkerSet && environmentName === 'ssr'
   const resolve = resolveEnvironmentResolveOptions(
     options.resolve,
     alias,
@@ -1145,7 +1145,12 @@ export async function resolveConfig(
     )
   }
 
-  await runConfigEnvironmentHook(config.environments, userPlugins, configEnv)
+  await runConfigEnvironmentHook(
+    config.environments,
+    userPlugins,
+    configEnv,
+    config.ssr?.target === 'webworker',
+  )
 
   const resolvedDefaultResolve = resolveResolveOptions(config.resolve, logger)
 
@@ -1916,14 +1921,18 @@ async function runConfigEnvironmentHook(
   environments: Record<string, EnvironmentOptions>,
   plugins: Plugin[],
   configEnv: ConfigEnv,
+  isSsrTargetWebworkerSet: boolean,
 ): Promise<void> {
   const environmentNames = Object.keys(environments)
   for (const p of getSortedPluginsByHook('configEnvironment', plugins)) {
     const hook = p.configEnvironment
     const handler = getHookHandler(hook)
     if (handler) {
       for (const name of environmentNames) {
-        const res = await handler(name, environments[name], configEnv)
+        const res = await handler(name, environments[name], {
+          ...configEnv,
+          isSsrTargetWebworker: isSsrTargetWebworkerSet && name === 'ssr',
+        })
         if (res) {
           environments[name] = mergeConfig(environments[name], res)
         }

packages/vite/src/node/plugin.ts

@@ -244,7 +244,13 @@ export interface Plugin<A = any> extends RollupPlugin<A> {
       this: void,
       name: string,
       config: EnvironmentOptions,
-      env: ConfigEnv,
+      env: ConfigEnv & {
+        /**
+         * Whether this environment is SSR environment and `ssr.target` is set to `'webworker'`.
+         * Only intended to be used for backward compatibility.
+         */
+        isSsrTargetWebworker?: boolean
+      },
     ) =>
       | EnvironmentOptions
       | null