dont use github eslint

.eslintignore

 node_modules
-dist/**

.eslintrc.js

+/* eslint-env node */
+module.exports = {
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+        "ecmaVersion": 12,
+        "sourceType": "module"
+    },
+    "rules": {
+    }
+};

.eslintrc.json

-{
-  "parserOptions": {
-    "ecmaVersion": 2015,
-    "sourceType": "module"
-  },
-  "globals": {
-    "WHATWGFetch": true,
-    "ArrayBuffer": true,
-    "DataView": true,
-    "Promise": true,
-    "Symbol": true,
-    "Uint8Array": true,
-    "globalThis": true
-  },
-  "extends": [
-    "plugin:github/browser"
-  ],
-  "rules": {
-    "object-shorthand": "off"
-  },
-  "overrides": [
-    {
-      "files": ["test/*.js"],
-      "env": {
-        "browser": true,
-        "mocha": true
-      },
-      "globals": {
-        "assert": true,
-        "chai": true,
-        "FileReaderSync": true,
-        "Mocha": true
-      }
-    },
-    {
-      "files": ["test/{karma,server}*.js"],
-      "env": {
-        "node": true
-      }
-    },
-    {
-      "files": ["test/worker.js"],
-      "env": {
-        "worker": true
-      }
-    }
-  ]
-}

fetch.js

+/* eslint-disable no-prototype-builtins */
 var global =
   (typeof globalThis !== 'undefined' && globalThis) ||
   (typeof self !== 'undefined' && self) ||
@@ -225,6 +226,7 @@ function Body() {
       semantic of setting Request.bodyUsed in the constructor before
       _initBody is called.
     */
+    // eslint-disable-next-line no-self-assign
     this.bodyUsed = this.bodyUsed
     this._bodyInit = body
     if (!body) {

package.json

@@ -10,7 +10,6 @@
     "abortcontroller-polyfill": "^1.1.9",
     "chai": "^4.1.2",
     "eslint": "^7.20.0",
-    "eslint-plugin-github": "^4.1.1",
     "karma": "^3.0.0",
     "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^2.2.0",

prettier.config.js

+/* eslint-env node */
 module.exports = require('eslint-plugin-github/prettier.config')

test/karma-worker.config.js

+/* eslint-env node */
 const parentConfig = require('./karma.config')
 
 module.exports = function(config) {

test/karma.config.js

+/* eslint-env node */
 const serverEndpoints = require('./server')
 
 module.exports = function(config) {

test/server.js

+/* eslint-env node */
 const url = require('url')
 const querystring = require('querystring')
 

test/test.js

+/* eslint-env mocha */
+/* globals chai assert FileReaderSync assert WHATWGFetch */
 var IEorEdge = /Edge\//.test(navigator.userAgent) || /MSIE/.test(navigator.userAgent)
 var Chrome = /Chrome\//.test(navigator.userAgent) && !IEorEdge
 var Safari = /Safari\//.test(navigator.userAgent) && !IEorEdge && !Chrome
@@ -104,7 +106,7 @@ if (!self.fetch.polyfill) {
 var slice = Array.prototype.slice
 
 function featureDependent(testOrSuite, condition) {
-  ;(condition ? testOrSuite : testOrSuite.skip).apply(this, slice.call(arguments, 2))
+  (condition ? testOrSuite : testOrSuite.skip).apply(this, slice.call(arguments, 2))
 }
 
 exercise.forEach(function(exerciseMode) {

test/worker-adapter.js

+/* eslint-env mocha */
+/* globals Mocha */
 var mochaRun = mocha.run
 mocha.run = function() {}
 

test/worker.js

+/* eslint-env worker */
+/* globals mocha chai */
 importScripts('/base/node_modules/mocha/mocha.js')
 importScripts('/base/node_modules/chai/chai.js')