refactor(dev): replace lodash

packages/react-router-dev/config/config.ts

@@ -1,5 +1,6 @@
-import fs from "node:fs";
 import { execSync } from "node:child_process";
+import fs from "node:fs";
+import { isDeepStrictEqual } from "node:util";
 import PackageJson from "@npmcli/package-json";
 import * as ViteNode from "../vite/vite-node";
 import type * as Vite from "vite";
@@ -9,11 +10,8 @@ import chokidar, {
   type EmitArgs as ChokidarEmitArgs,
 } from "chokidar";
 import colors from "picocolors";
-import pick from "lodash/pick";
-import omit from "lodash/omit";
-import cloneDeep from "lodash/cloneDeep";
-import isEqual from "lodash/isEqual";
 
+import { omit, pick } from "../utils";
 import {
   type RouteManifest,
   type RouteManifestEntry,
@@ -389,7 +387,7 @@ async function resolveConfig({
   }
 
   // Prevent mutations to the user config
-  reactRouterUserConfig = deepFreeze(cloneDeep(reactRouterUserConfig));
+  reactRouterUserConfig = deepFreeze(structuredClone(reactRouterUserConfig));
 
   let presets: ReactRouterConfig[] = (
     await Promise.all(
@@ -404,12 +402,11 @@ async function resolveConfig({
           return null;
         }
 
-        let configPreset: ReactRouterConfig = omit(
+        return omit(
           await preset.reactRouterConfig({ reactRouterUserConfig }),
+          // @ts-expect-error
           excludedConfigPresetKeys,
         );
-
-        return configPreset;
       }),
     )
   ).filter(function isNotNull<T>(value: T | null): value is T {
@@ -775,10 +772,14 @@ export async function createConfigLoader({
 
           let configChanged =
             result.ok &&
-            !isEqual(omitRoutes(currentConfig), omitRoutes(result.value));
+            !isDeepStrictEqual(
+              omitRoutes(currentConfig),
+              omitRoutes(result.value),
+            );
 
           let routeConfigChanged =
-            result.ok && !isEqual(currentConfig?.routes, result.value.routes);
+            result.ok &&
+            !isDeepStrictEqual(currentConfig?.routes, result.value.routes);
 
           for (let handler of changeHandlers) {
             handler({

packages/react-router-dev/config/routes.ts

@@ -1,8 +1,8 @@
 import * as Path from "pathe";
 import * as v from "valibot";
-import pick from "lodash/pick";
 
 import invariant from "../invariant";
+import { pick } from "../utils";
 
 declare global {
   var __reactRouterAppDirectory: string;
@@ -240,7 +240,10 @@ type CreateIndexOptions = Pick<
  * Helper function for creating a route config entry for an index route, for use
  * within `routes.ts`.
  */
-function index(file: string, options?: CreateIndexOptions): RouteConfigEntry {
+function index(
+  file: string,
+  options: CreateIndexOptions = {},
+): RouteConfigEntry {
   return {
     file,
     index: true,

packages/react-router-dev/package.json

@@ -86,11 +86,11 @@
     "es-module-lexer": "^1.3.1",
     "exit-hook": "2.2.1",
     "jsesc": "3.0.2",
-    "lodash": "^4.17.21",
     "pathe": "^1.1.2",
     "picocolors": "^1.1.1",
     "prettier": "^3.6.2",
     "react-refresh": "^0.14.0",
+    "scule": "^1.3.0",
     "semver": "^7.3.7",
     "set-cookie-parser": "^2.6.0",
     "tinyglobby": "^0.2.14",
@@ -105,7 +105,6 @@
     "@types/dedent": "^0.7.0",
     "@types/express": "^4.17.9",
     "@types/jsesc": "^3.0.1",
-    "@types/lodash": "^4.14.182",
     "@types/node": "^20.0.0",
     "@types/npmcli__package-json": "^4.0.0",
     "@types/set-cookie-parser": "^2.4.1",

packages/react-router-dev/utils.ts

@@ -0,0 +1,15 @@
+export const pick = <T extends object, K extends keyof T>(
+  obj: T,
+  keys: readonly K[],
+): Pick<T, K> =>
+  Object.fromEntries(
+    Object.entries(obj).filter(([key]) => keys.includes(key as K)),
+  ) as Pick<T, K>;
+
+export const omit = <T extends object, K extends keyof T>(
+  obj: T,
+  keys: readonly K[],
+): Omit<T, K> =>
+  Object.fromEntries(
+    Object.entries(obj).filter(([key]) => !keys.includes(key as K)),
+  ) as Omit<T, K>;

packages/react-router-dev/vite/plugin.ts

@@ -31,11 +31,10 @@ import {
   init as initEsModuleLexer,
   parse as esModuleLexer,
 } from "es-module-lexer";
+import { kebabCase } from "scule";
 import { escapePath as escapePathAsGlob } from "tinyglobby";
-import pick from "lodash/pick";
 import jsesc from "jsesc";
 import colors from "picocolors";
-import kebabCase from "lodash/kebabCase";
 
 import * as Typegen from "../typegen";
 import type { RouteManifestEntry, RouteManifest } from "../config/routes";
@@ -44,6 +43,7 @@ import type {
   Manifest as ReactRouterManifest,
 } from "../manifest";
 import invariant from "../invariant";
+import { pick } from "../utils";
 import type { Cache } from "./cache";
 import { generate, parse } from "./babel";
 import type { NodeRequestHandler } from "./node-adapter";