Create browser config

For modern browsers.

Signed-off-by: Kevin Locke <[email protected]>

README.md

@@ -33,6 +33,7 @@ This package includes configurations for several different environments:
 
 | Name                                    | Description                              |
 | --------------------------------------- | ---------------------------------------- |
+| `@kevinoid/eslint-config/browser`       | Modern browsers                          |
 | `@kevinoid/eslint-config/ie11`          | Browsers including Internet Explorer 11. |
 | `@kevinoid/eslint-config/nodejs`        | Node 6 and later.                        |
 | `@kevinoid/eslint-config/webextensions` | [Browser Extensions](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions) |

browser.js

@@ -0,0 +1,50 @@
+// ESLint configuration for JS run directly in (modern) browsers.
+// <https://eslint.org/docs/user-guide/configuring>
+
+"use strict";
+
+module.exports = {
+  // Based on Airbnb with changes to match Node core and my prefs.
+  "extends": [
+    "airbnb-base",
+
+    // ESLint built-in rules
+    "./rules/es6",
+    "./rules/best-practices",
+    "./rules/possible-errors",
+    "./rules/style",
+    "./rules/variables",
+
+    // Plugin rules
+    "./rules/jsdoc",
+    "./rules/promise",
+    "./rules/regexp",
+    "./rules/unicorn"
+  ],
+
+  "parserOptions": {
+    "sourceType": "script",
+    // airbnb-base disables generators due to regenerator-runtime overhead.
+    // Modern browsers support generators without regenerator, so allow.
+    "ecmaFeatures": {
+      "generators": true
+    }
+  },
+
+  "env": {
+    "browser": true,
+    // Disable node env added by airbnb-base/legacy
+    "node": false
+  },
+
+  "rules": {
+    // allow console (which is always supported and conventional for logging)
+    "no-console": "off",
+
+    // require 'use strict' in global scope
+    "strict": ["error", "global"],
+
+    // don't prefer modules
+    "unicorn/prefer-module": "off"
+  }
+};

package.json

@@ -22,6 +22,8 @@
     "!**/.*"
   ],
   "exports": {
+    "./browser": "./browser.js",
+    "./browser.js": "./browser.js",
     "./ie11": "./ie11.js",
     "./ie11.js": "./ie11.js",
     "./package.json": "./package.json",
@@ -43,8 +45,9 @@
     "postpublish": "git push --follow-tags origin main && echo Remember to update GitHub Releases from CHANGELOG.md",
     "preversion": "depcheck --ignores=\"eslint-*,rimraf\" && david && git-branch-is main && hub-ci-status -vv --wait",
     "test": "npm run test-peer-versions-ci && npm run lint && npm run test-eslint",
-    "test-eslint": "npm run test-eslint-ie11 && npm run test-eslint-node && npm run test-eslint-webextensions && npm run test-eslint-wsh",
+    "test-eslint": "npm run test-eslint-browser && npm run test-eslint-ie11 && npm run test-eslint-node && npm run test-eslint-webextensions && npm run test-eslint-wsh",
     "//": "Test that config can be loaded and works on empty input.  Note: echo prints 'ECHO is on.' in cmd.exe, : produces no output in cmd.exe or sh.",
+    "test-eslint-browser": ": | eslint --no-eslintrc -c browser.js --stdin",
     "test-eslint-ie11": ": | eslint --no-eslintrc -c ie11.js --stdin",
     "test-eslint-node": ": | eslint --no-eslintrc -c nodejs.js --stdin",
     "test-eslint-webextensions": ": | eslint --no-eslintrc -c webextensions.js --stdin",