no-electron-disable-context-isolation

Disallow disabling Electron webPreferences.contextIsolation.

Targeted pattern scope

This rule targets Electron BrowserWindow and BrowserView constructor options that set webPreferences.contextIsolation to false.

What this rule reports

This rule reports webPreferences.contextIsolation: false in Electron renderer configuration objects.

Why this rule exists

Disabling context isolation collapses separation between preload and renderer contexts, increasing exposure of privileged APIs.

❌ Incorrect

new BrowserWindow({
 webPreferences: {
  contextIsolation: false,
 },
});

✅ Correct

new BrowserWindow({
 webPreferences: {
  contextIsolation: true,
 },
});

ESLint flat config example

import sdl from "eslint-plugin-sdl-2";

export default [
 {
  plugins: { sdl },
  rules: {
   "sdl/no-electron-disable-context-isolation": "error",
  },
 },
];

When not to use it

Disable only for legacy renderer code that cannot migrate yet and is protected with strict, documented compensating controls.

Package documentation

Rule source

Targeted pattern scope​

What this rule reports​

Why this rule exists​

❌ Incorrect​

✅ Correct​

ESLint flat config example​

When not to use it​

Package documentation​

Further reading​