refactor: type-safe module imports / requires (#41192)

lib/browser/init.ts

@@ -3,6 +3,8 @@ import * as fs from 'fs';
 import * as path from 'path';
 
 import type * as defaultMenuModule from '@electron/internal/browser/default-menu';
+import type * as url from 'url';
+import type * as v8 from 'v8';
 
 const Module = require('module') as NodeJS.ModuleInternal;
 
@@ -132,7 +134,7 @@ if (packageJson.desktopName != null) {
 // Set v8 flags, deliberately lazy load so that apps that do not use this
 // feature do not pay the price
 if (packageJson.v8Flags != null) {
-  require('v8').setFlagsFromString(packageJson.v8Flags);
+  (require('v8') as typeof v8).setFlagsFromString(packageJson.v8Flags);
 }
 
 app.setAppPath(packagePath);
@@ -199,7 +201,7 @@ if (packagePath) {
   // Finally load app's main.js and transfer control to C++.
   if ((packageJson.type === 'module' && !mainStartupScript.endsWith('.cjs')) || mainStartupScript.endsWith('.mjs')) {
     const { loadESM } = __non_webpack_require__('internal/process/esm_loader');
-    const main = require('url').pathToFileURL(path.join(packagePath, mainStartupScript));
+    const main = (require('url') as typeof url).pathToFileURL(path.join(packagePath, mainStartupScript));
     loadESM(async (esmLoader: any) => {
       try {
         await esmLoader.import(main.toString(), undefined, Object.create(null));

lib/common/init.ts

@@ -1,6 +1,7 @@
 import * as util from 'util';
+import type * as stream from 'stream';
 
-const timers = require('timers');
+import timers = require('timers');
 
 type AnyFn = (...args: any[]) => any
 
@@ -62,7 +63,7 @@ if (process.type === 'browser' ||
 
 if (process.platform === 'win32') {
   // Always returns EOF for stdin stream.
-  const { Readable } = require('stream');
+  const { Readable } = require('stream') as typeof stream;
   const stdin = new Readable();
   stdin.push(null);
   Object.defineProperty(process, 'stdin', {

lib/node/asar-fs-wrapper.ts

@@ -2,7 +2,9 @@ import { Buffer } from 'buffer';
 import { constants } from 'fs';
 import * as path from 'path';
 import * as util from 'util';
+
 import type * as Crypto from 'crypto';
+import type * as os from 'os';
 
 const asar = process._linkedBinding('electron_common_asar');
 
@@ -255,7 +257,7 @@ export const wrapFsWithAsar = (fs: Record<string, any>) => {
     if (!process.env.ELECTRON_LOG_ASAR_READS) return;
     if (!logFDs.has(asarPath)) {
       const logFilename = `${path.basename(asarPath, '.asar')}-access-log.txt`;
-      const logPath = path.join(require('os').tmpdir(), logFilename);
+      const logPath = path.join((require('os') as typeof os).tmpdir(), logFilename);
       logFDs.set(asarPath, fs.openSync(logPath, 'a'));
     }
     fs.writeSync(logFDs.get(asarPath), `${offset}: ${filePath}\n`);

lib/sandboxed_renderer/init.ts

@@ -1,4 +1,5 @@
 import * as events from 'events';
+import { setImmediate, clearImmediate } from 'timers';
 import { IPC_MESSAGES } from '@electron/internal/common/ipc-messages';
 
 import type * as ipcRendererUtilsModule from '@electron/internal/renderer/ipc-renderer-internal-utils';
@@ -126,7 +127,6 @@ function runPreloadScript (preloadSrc: string) {
 
   // eval in window scope
   const preloadFn = binding.createPreloadScript(preloadWrapperSrc);
-  const { setImmediate, clearImmediate } = require('timers');
   const exports = {};
 
   preloadFn(preloadRequire, preloadProcess, Buffer, global, setImmediate, clearImmediate, exports, { exports });