feat: support exportConditions and add worker default conditions

src/rollup/config.ts

@@ -6,7 +6,6 @@ import { defu } from "defu";
 // import terser from "@rollup/plugin-terser"; // TODO: Investigate jiti issue
 import type { RollupWasmOptions } from "@rollup/plugin-wasm";
 import commonjs from "@rollup/plugin-commonjs";
-import { nodeResolve } from "@rollup/plugin-node-resolve";
 import alias from "@rollup/plugin-alias";
 import json from "@rollup/plugin-json";
 import wasmPlugin from "@rollup/plugin-wasm";
@@ -36,6 +35,7 @@ import { raw } from "./plugins/raw";
 import { storage } from "./plugins/storage";
 import { importMeta } from "./plugins/import-meta";
 import { appConfig } from "./plugins/app-config";
+import { nodeResolvePlugin } from "./plugins/node-resolve";
 
 export type RollupConfig = InputOptions & { output: OutputOptions };
 
@@ -417,23 +417,7 @@ export const plugins = [
   }
 
   // https://github.com/rollup/plugins/tree/master/packages/node-resolve
-  rollupConfig.plugins.push(
-    nodeResolve({
-      extensions,
-      preferBuiltins: !!nitro.options.node,
-      rootDir: nitro.options.rootDir,
-      modulePaths: nitro.options.nodeModulesDirs,
-      // 'module' is intentionally not supported because of externals
-      mainFields: ["main"],
-      exportConditions: [
-        "default",
-        nitro.options.dev ? "development" : "production",
-        "module",
-        "node",
-        "import",
-      ],
-    })
-  );
+  rollupConfig.plugins.push(nodeResolvePlugin(nitro, extensions));
 
   // Automatically mock unresolved externals
   // rollupConfig.plugins.push(autoMock())

src/rollup/plugins/node-resolve.ts

@@ -0,0 +1,88 @@
+import { nodeResolve } from "@rollup/plugin-node-resolve";
+import { kebabCase } from "scule";
+import type { Nitro, NitroOptions } from "../../types";
+
+const rKeys = (runtimeKeys: string | string[], conditions: string[]) => {
+  const keys = Array.isArray(runtimeKeys) ? runtimeKeys : [runtimeKeys];
+  return [...keys, ...conditions.filter((c) => !new Set(keys).has(c))];
+};
+
+// https://github.com/rollup/plugins/tree/master/packages/node-resolve
+export const nodeResolvePlugin = (nitro: Nitro, extensions: string[]) => {
+  const defaultExportConditions = [
+    "default",
+    nitro.options.dev ? "development" : "production",
+    "module",
+    "node",
+    "import",
+  ];
+
+  /**
+   * Attempt to match generic non-node runtime first,
+   * then try to match providers runtime keys,
+   * then finally browser, deno and node.
+   * https://runtime-keys.proposal.wintercg.org/
+   */
+  const workerExportConditions = [
+    "wintercg",
+    "worker",
+    "web",
+    "workerd",
+    "edge-light",
+    "lagon",
+    "netlify",
+    "edge-routine",
+    "browser",
+    "import",
+    "module",
+    "deno",
+    "default",
+    nitro.options.dev ? "development" : "production",
+    "node",
+  ];
+
+  const getExportConditions = (preset: NitroOptions["preset"]) => {
+    switch (kebabCase(preset)) {
+      case "node-server":
+      case "node-cluster":
+      case "node": {
+        return rKeys("node", defaultExportConditions);
+      }
+      case "bun": {
+        return rKeys("bun", defaultExportConditions);
+      }
+      case "deno": {
+        return rKeys("deno", workerExportConditions);
+      }
+      case "netlify-edge": {
+        return rKeys("netlify", workerExportConditions);
+      }
+      case "lagon": {
+        return rKeys("lagon", workerExportConditions);
+      }
+      case "vercel-edge": {
+        return rKeys(["edge-light", "http"], workerExportConditions);
+      }
+      case "cloudflare-pages":
+      case "cloudflare-module":
+      case "cloudflare": {
+        return rKeys("workerd", workerExportConditions);
+      }
+      default: {
+        return defaultExportConditions;
+      }
+    }
+  };
+
+  return nodeResolve({
+    extensions,
+    preferBuiltins: !!nitro.options.node,
+    rootDir: nitro.options.rootDir,
+    modulePaths: nitro.options.nodeModulesDirs,
+    // 'module' is intentionally not supported because of externals
+    mainFields: ["main"],
+    exportConditions:
+      nitro.options.exportConditions ??
+      getExportConditions(nitro.options.preset),
+  });
+};

src/types/nitro.ts

@@ -267,6 +267,7 @@ export interface NitroOptions extends PresetOptions {
   analyze: false | PluginVisualizerOptions;
   replace: Record<string, string | ((id: string) => string)>;
   commonJS?: RollupCommonJSOptions;
+  exportConditions?: string[];
 
   // Advanced
   typescript: {