docs: update sandbox-option.md (#17468)

* docs: update sandbox-option.md

* Update docs/api/sandbox-option.md

Co-Authored-By: miniak <[email protected]>

docs/api/app.md

@@ -1240,7 +1240,7 @@ Returns `String` - The command-line switch value.
 
 **Note:** When the switch is not present or has no value, it returns empty string.
 
-### `app.enableSandbox()` _Experimental_ _macOS_ _Windows_
+### `app.enableSandbox()` _Experimental_
 
 Enables full sandbox mode on the app.
 

docs/api/sandbox-option.md

@@ -1,9 +1,7 @@
 # `sandbox` Option
 
-> Create a browser window with a renderer that can run inside Chromium OS sandbox. With this
+> Create a browser window with a sandboxed renderer. With this
 option enabled, the renderer must communicate via IPC to the main process in order to access node APIs.
-However, in order to enable the Chromium OS sandbox, Electron must be run with the `--enable-sandbox`
-command line argument.
 
 One of the key security features of Chromium is that all blink rendering/JavaScript
 code is executed within a sandbox. This sandbox uses OS-specific features to ensure
@@ -56,36 +54,18 @@ only via IPC. The use of this option stops Electron from creating a Node.js runt
 within this new window `window.open` follows the native behaviour (by default Electron creates a [`BrowserWindow`](browser-window.md)
 and returns a proxy to this via `window.open`).
 
-It is important to note that this option alone won't enable the OS-enforced sandbox. To enable this feature, the
-`--enable-sandbox` command-line argument must be passed to electron, which will
-force `sandbox: true` for all `BrowserWindow` instances.
+[`app.enableSandbox`](app.md#appenablesandbox-experimental) can be used to force `sandbox: true` for all `BrowserWindow` instances.
 
 ```js
 let win
+app.enableSandbox()
 app.on('ready', () => {
-  // no need to pass `sandbox: true` since `--enable-sandbox` was enabled.
+  // no need to pass `sandbox: true` since `app.enableSandbox()` was called.
   win = new BrowserWindow()
   win.loadURL('http://google.com')
 })
 ```
 
-Note that it is not enough to call
-`app.commandLine.appendSwitch('--enable-sandbox')`, as electron/node startup
-code runs after it is possible to make changes to Chromium sandbox settings. The
-switch must be passed to Electron on the command-line:
-
-```sh
-electron --enable-sandbox app.js
-```
-
-It is not possible to have the OS sandbox active only for some renderers, if
-`--enable-sandbox` is enabled, normal Electron windows cannot be created.
-
-If you need to mix sandboxed and non-sandboxed renderers in one application,
-omit the `--enable-sandbox` argument. Without this argument, windows
-created with `sandbox: true` will still have Node.js disabled and communicate
-only via IPC, which by itself is already a gain from security POV.
-
 ## Preload
 
 An app can make customizations to sandboxed renderers using a preload script.
@@ -110,8 +90,8 @@ and preload.js:
 // This file is loaded whenever a javascript context is created. It runs in a
 // private scope that can access a subset of Electron renderer APIs. We must be
 // careful to not leak any objects into the global scope!
-const fs = require('fs')
-const { ipcRenderer } = require('electron')
+const { ipcRenderer, remote } = require('electron')
+const fs = remote.require('fs')
 
 // read a configuration file using the `fs` module
 const buf = fs.readFileSync('allowed-popup-urls.json')
@@ -136,9 +116,7 @@ Important things to notice in the preload script:
   access to a limited node-like environment: `Buffer`, `process`, `setImmediate`
   and `require` are available.
 - The preload script can indirectly access all APIs from the main process through the
-  `remote` and `ipcRenderer` modules. This is how `fs` (used above) and other
-  modules are implemented: They are proxies to remote counterparts in the main
-  process.
+  `remote` and `ipcRenderer` modules.
 - The preload script must be contained in a single script, but it is possible to have
   complex preload code composed with multiple modules by using a tool like
   browserify, as explained below. In fact, browserify is already used by
@@ -150,7 +128,6 @@ the following should be used:
 ```sh
   browserify preload/index.js \
     -x electron \
-    -x fs \
     --insert-global-vars=__filename,__dirname -o preload.js
 ```
 
@@ -163,14 +140,14 @@ injects code for those).
 Currently the `require` function provided in the preload scope exposes the
 following modules:
 
-- `child_process`
 - `electron`
   - `crashReporter`
-  - `remote`
+  - `desktopCapturer`
   - `ipcRenderer`
+  - `nativeImage`
+  - `remote`
   - `webFrame`
-- `fs`
-- `os`
+- `events`
 - `timers`
 - `url`