Upgrade eslint and rewrite to modern js

Author: marcbachmann

.eslintrc

@@ -20,11 +20,11 @@ axios-mock-adapter works on Node as well as in a browser, it works with axios v0
 Mocking a `GET` request
 
 ```js
-var axios = require("axios");
-var AxiosMockAdapter = require("axios-mock-adapter");
+const axios = require("axios");
+const AxiosMockAdapter = require("axios-mock-adapter");
 
 // This sets the mock adapter on the default instance
-var mock = new AxiosMockAdapter(axios);
+const mock = new AxiosMockAdapter(axios);
 
 // Mock any GET request to /users
 // arguments for reply are (status, data, headers)
@@ -40,11 +40,11 @@ axios.get("/users").then(function (response) {
 Mocking a `GET` request with specific parameters
 
 ```js
-var axios = require("axios");
-var AxiosMockAdapter = require("axios-mock-adapter");
+const axios = require("axios");
+const AxiosMockAdapter = require("axios-mock-adapter");
 
 // This sets the mock adapter on the default instance
-var mock = new AxiosMockAdapter(axios);
+const mock = new AxiosMockAdapter(axios);
 
 // Mock GET request to /users when param `searchText` is 'John'
 // arguments for reply are (status, data, headers)
@@ -65,7 +65,7 @@ To add a delay to responses, specify a delay amount (in milliseconds) when insta
 
 ```js
 // All requests using this instance will have a 2 seconds delay:
-var mock = new AxiosMockAdapter(axiosInstance, { delayResponse: 2000 });
+const mock = new AxiosMockAdapter(axiosInstance, { delayResponse: 2000 });
 ```
 
 You can restore the original adapter (which will remove the mocking behavior)
@@ -279,15 +279,15 @@ If you set `onNoMatch` option to `passthrough` all requests would be forwarded o
 ```js
 // Mock all requests to /foo with HTTP 200, but forward
 // any others requests to server
-var mock = new AxiosMockAdapter(axiosInstance, { onNoMatch: "passthrough" });
+const mock = new AxiosMockAdapter(axiosInstance, { onNoMatch: "passthrough" });
 
 mock.onAny("/foo").reply(200);
 ```
 
 Using `onNoMatch` option with `throwException` to throw an exception when a request is made without match any handler. It's helpful to debug your test mocks.
 
 ```js
-var mock = new AxiosMockAdapter(axiosInstance, { onNoMatch: "throwException" });
+const mock = new AxiosMockAdapter(axiosInstance, { onNoMatch: "throwException" });
 
 mock.onAny("/foo").reply(200);
 
@@ -323,9 +323,9 @@ mock.onGet("/product").reply(function (config) {
 Composing from multiple sources with Promises:
 
 ```js
-var normalAxios = axios.create();
-var mockAxios = axios.create();
-var mock = new AxiosMockAdapter(mockAxios);
+const normalAxios = axios.create();
+const mockAxios = axios.create();
+const mock = new AxiosMockAdapter(mockAxios);
 
 mock
   .onGet("/orders")
@@ -351,7 +351,7 @@ This is useful for testing.
 ```js
 describe("Feature", () => {
   it("requests an endpoint", (done) => {
-    var mock = new AxiosMockAdapter(axios);
+    const mock = new AxiosMockAdapter(axios);
     mock.onPost("/endpoint").replyOnce(200);
 
     feature

README.md

@@ -0,0 +1,65 @@
+"use strict";
+
+module.exports = [
+  {
+    ignores: [
+      "dist/"
+    ]
+  },
+  {
+    languageOptions: {
+      ecmaVersion: 2022,
+      sourceType: "commonjs"
+    },
+
+    rules: {
+      "brace-style": [2, "1tbs", { "allowSingleLine": false }],
+      quotes: [
+        2,
+        "double",
+        {
+          avoidEscape: true,
+          allowTemplateLiterals: true
+        }
+      ],
+      "comma-dangle": [2, "only-multiline"],
+      "curly": [2, "multi-line"],
+      "eol-last": 2,
+      "eqeqeq": 2,
+      "key-spacing": [2, { "beforeColon": false, "afterColon": true }],
+      "keyword-spacing": 2,
+      "new-cap": 0,
+      "no-native-reassign": 2,
+      "no-extra-semi": 2,
+      "no-multiple-empty-lines": [2, { "max": 1 }],
+      // "no-param-reassign": [2, { "props": false }],
+      "no-trailing-spaces": 2,
+      "no-underscore-dangle": 0,
+      "no-unused-vars": [
+        2,
+        {
+          vars: "all",
+          args: "none",
+          caughtErrors: "all",
+          argsIgnorePattern: "^_",
+          caughtErrorsIgnorePattern: "^_"
+        }
+      ],
+      "object-curly-spacing": [2, "always"],
+      "padded-blocks": [2, "never"],
+      "semi": [2, "always"],
+      "space-before-blocks": [2, "always"],
+      "no-var": 2,
+      "prefer-const": [
+        2,
+        {
+          destructuring: "any",
+          ignoreReadBeforeAssign: true
+        }
+      ],
+
+      "prefer-promise-reject-errors": 2,
+      "prefer-template": 2
+    }
+  }
+];