Update Webpack + deps, remove now unnecessary polyfills (#2410)

* Update deps

 * handles webpack 1 -> 4 migration

* remove promise helpers from dev files

assume `Promise` is available, or polyfilled by
the consumer

* Remove isArray util. `isArray` has good coverage, even
   in IE9. So lets remove the custom polyfill.

 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray

also resolves a few lint issues

* Remove trim util

String.protoype.trim has good coverage (including IE9)

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/Trim

Also, the http adapter already uses the native method.

bower.json

@@ -21,7 +21,6 @@
   "license": "MIT",
   "ignore": [
     "**/.*",
-    "*.iml",
     "examples",
     "lib",
     "node_modules",

lib/core/enhanceError.js

@@ -20,7 +20,7 @@ module.exports = function enhanceError(error, config, code, request, response) {
   error.response = response;
   error.isAxiosError = true;
 
-  error.toJSON = function() {
+  error.toJSON = function toJSON() {
     return {
       // Standard
       message: this.message,

lib/helpers/buildURL.js

@@ -39,7 +39,7 @@ module.exports = function buildURL(url, params, paramsSerializer) {
         return;
       }
 
-      if (utils.isArray(val)) {
+      if (Array.isArray(val)) {
         key = key + '[]';
       } else {
         val = [val];

lib/helpers/parseHeaders.js

@@ -34,8 +34,8 @@ module.exports = function parseHeaders(headers) {
 
   utils.forEach(headers.split('\n'), function parser(line) {
     i = line.indexOf(':');
-    key = utils.trim(line.substr(0, i)).toLowerCase();
-    val = utils.trim(line.substr(i + 1));
+    key = line.substr(0, i).trim().toLowerCase();
+    val = line.substr(i + 1).trim();
 
     if (key) {
       if (parsed[key] && ignoreDuplicateOf.indexOf(key) >= 0) {

lib/utils.js

@@ -3,21 +3,9 @@
 var bind = require('./helpers/bind');
 var isBuffer = require('is-buffer');
 
-/*global toString:true*/
-
 // utils is a library of generic helper functions non-specific to axios
 
-var toString = Object.prototype.toString;
-
-/**
- * Determine if a value is an Array
- *
- * @param {Object} val The value to test
- * @returns {boolean} True if value is an Array, otherwise false
- */
-function isArray(val) {
-  return toString.call(val) === '[object Array]';
-}
+var _toString = Object.prototype.toString;
 
 /**
  * Determine if a value is an ArrayBuffer
@@ -26,7 +14,7 @@ function isArray(val) {
  * @returns {boolean} True if value is an ArrayBuffer, otherwise false
  */
 function isArrayBuffer(val) {
-  return toString.call(val) === '[object ArrayBuffer]';
+  return _toString.call(val) === '[object ArrayBuffer]';
 }
 
 /**
@@ -102,7 +90,7 @@ function isObject(val) {
  * @returns {boolean} True if value is a Date, otherwise false
  */
 function isDate(val) {
-  return toString.call(val) === '[object Date]';
+  return _toString.call(val) === '[object Date]';
 }
 
 /**
@@ -112,7 +100,7 @@ function isDate(val) {
  * @returns {boolean} True if value is a File, otherwise false
  */
 function isFile(val) {
-  return toString.call(val) === '[object File]';
+  return _toString.call(val) === '[object File]';
 }
 
 /**
@@ -122,7 +110,7 @@ function isFile(val) {
  * @returns {boolean} True if value is a Blob, otherwise false
  */
 function isBlob(val) {
-  return toString.call(val) === '[object Blob]';
+  return _toString.call(val) === '[object Blob]';
 }
 
 /**
@@ -132,7 +120,7 @@ function isBlob(val) {
  * @returns {boolean} True if value is a Function, otherwise false
  */
 function isFunction(val) {
-  return toString.call(val) === '[object Function]';
+  return _toString.call(val) === '[object Function]';
 }
 
 /**
@@ -155,16 +143,6 @@ function isURLSearchParams(val) {
   return typeof URLSearchParams !== 'undefined' && val instanceof URLSearchParams;
 }
 
-/**
- * Trim excess whitespace off the beginning and end of a string
- *
- * @param {String} str The String to trim
- * @returns {String} The String freed of excess whitespace
- */
-function trim(str) {
-  return str.replace(/^\s*/, '').replace(/\s*$/, '');
-}
-
 /**
  * Determine if we're running in a standard browser environment
  *
@@ -216,7 +194,7 @@ function forEach(obj, fn) {
     obj = [obj];
   }
 
-  if (isArray(obj)) {
+  if (Array.isArray(obj)) {
     // Iterate over array values
     for (var i = 0, l = obj.length; i < l; i++) {
       fn.call(null, obj[i], i, obj);
@@ -310,7 +288,6 @@ function extend(a, b, thisArg) {
 }
 
 module.exports = {
-  isArray: isArray,
   isArrayBuffer: isArrayBuffer,
   isBuffer: isBuffer,
   isFormData: isFormData,
@@ -329,6 +306,5 @@ module.exports = {
   forEach: forEach,
   merge: merge,
   deepMerge: deepMerge,
-  extend: extend,
-  trim: trim
+  extend: extend
 };

package.json

@@ -34,39 +34,37 @@
   "devDependencies": {
     "bundlesize": "^0.17.0",
     "coveralls": "^3.0.0",
-    "es6-promise": "^4.2.4",
     "grunt": "^1.0.2",
     "grunt-banner": "^0.6.0",
     "grunt-cli": "^1.2.0",
-    "grunt-contrib-clean": "^1.1.0",
+    "grunt-contrib-clean": "^2.0.0",
     "grunt-contrib-watch": "^1.0.0",
-    "grunt-eslint": "^20.1.0",
-    "grunt-karma": "^2.0.0",
+    "grunt-eslint": "^22.0.0",
+    "grunt-karma": "^3.0.2",
     "grunt-mocha-test": "^0.13.3",
     "grunt-ts": "^6.0.0-beta.19",
-    "grunt-webpack": "^1.0.18",
-    "istanbul-instrumenter-loader": "^1.0.0",
+    "grunt-webpack": "^3.1.3",
+    "istanbul-instrumenter-loader": "^3.0.1",
     "jasmine-core": "^2.4.1",
-    "karma": "^1.3.0",
-    "karma-chrome-launcher": "^2.2.0",
-    "karma-coverage": "^1.1.1",
+    "karma": "^4.3.0",
+    "karma-chrome-launcher": "^3.1.0",
+    "karma-coverage": "^2.0.1",
     "karma-firefox-launcher": "^1.1.0",
-    "karma-jasmine": "^1.1.1",
+    "karma-jasmine": "^2.0.1",
     "karma-jasmine-ajax": "^0.1.13",
     "karma-opera-launcher": "^1.0.0",
     "karma-safari-launcher": "^1.0.0",
-    "karma-sauce-launcher": "^1.2.0",
+    "karma-sauce-launcher": "^2.0.2",
     "karma-sinon": "^1.0.5",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^1.7.0",
-    "load-grunt-tasks": "^3.5.2",
+    "karma-webpack": "^4.0.2",
+    "load-grunt-tasks": "^5.1.0",
     "minimist": "^1.2.0",
-    "mocha": "^5.2.0",
-    "sinon": "^4.5.0",
+    "mocha": "^6.2.0",
+    "sinon": "^7.4.2",
     "typescript": "^2.8.1",
     "url-search-params": "^0.10.0",
-    "webpack": "^1.13.1",
-    "webpack-dev-server": "^1.14.1"
+    "webpack": "^4.40.2"
   },
   "browser": {
     "./lib/adapters/http.js": "./lib/adapters/xhr.js"

test/manual/basic.html

@@ -7,7 +7,6 @@
 
 An alert should be shown with the <code>{"name":"axios"}</code>
 
-<script src="promise.js"></script>
 <script src="../../dist/axios.js"></script>
 <script>
     axios.get('./fixture.json').then(function(response) {
@@ -18,4 +17,4 @@ An alert should be shown with the <code>{"name":"axios"}</code>
 </script>
 
 </body>
-</html>
+</html>

test/manual/cors.html

@@ -7,7 +7,6 @@
 
 An alert should be shown with <code>{"status":"ok"}</code>
 
-<script src="promise.js"></script>
 <script src="../../dist/axios.js"></script>
 <script>
     axios.get('http://cors-test.appspot.com/test').then(function(response) {
@@ -17,4 +16,4 @@ An alert should be shown with <code>{"status":"ok"}</code>
 </script>
 
 </body>
-</html>
+</html>

test/specs/__helpers.js

@@ -1,6 +1,3 @@
-// Polyfill ES6 Promise
-require('es6-promise').polyfill();
-
 // Polyfill URLSearchParams
 URLSearchParams = require('url-search-params');
 

test/specs/utils/isX.spec.js

@@ -2,11 +2,6 @@ var utils = require('../../../lib/utils');
 var Stream = require('stream');
 
 describe('utils::isX', function () {
-  it('should validate Array', function () {
-    expect(utils.isArray([])).toEqual(true);
-    expect(utils.isArray({length: 5})).toEqual(false);
-  });
-
   it('should validate ArrayBuffer', function () {
     expect(utils.isArrayBuffer(new ArrayBuffer(2))).toEqual(true);
     expect(utils.isArrayBuffer({})).toEqual(false);

test/specs/utils/trim.spec.js

@@ -1,12 +0,0 @@
-var trim = require('../../../lib/utils').trim;
-
-describe('utils::trim', function () {
-  it('should trim spaces', function () {
-    expect(trim('  foo  ')).toEqual('foo');
-  });
-
-  it('should trim tabs', function () {
-    expect(trim('\tfoo\t')).toEqual('foo');
-  });
-});
-

webpack.config.js

@@ -1,12 +1,13 @@
-var webpack = require('webpack');
-var config = {};
+const webpack = require('webpack');
+const TerserPlugin = require('terser-webpack-plugin');
+const config = {};
 
 function generateConfig(name) {
-  var uglify = name.indexOf('min') > -1;
-  var config = {
+  return {
+    mode: 'production',
     entry: './index.js',
     output: {
-      path: 'dist/',
+      path: `${__dirname}/dist`,
       filename: name + '.js',
       sourceMapFilename: name + '.map',
       library: 'axios',
@@ -15,30 +16,21 @@ function generateConfig(name) {
     node: {
       process: false
     },
-    devtool: 'source-map'
+    devtool: 'source-map',
+    optimization: {
+      minimize: name.includes('min'),
+      minimizer: [
+        // config options documented at https://github.com/webpack-contrib/terser-webpack-plugin#terseroptions
+        new TerserPlugin({
+          sourceMap: true,
+        }),
+      ],
+    },
   };
-
-  config.plugins = [
-    new webpack.DefinePlugin({
-      'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV)
-    })
-  ];
-
-  if (uglify) {
-    config.plugins.push(
-      new webpack.optimize.UglifyJsPlugin({
-        compressor: {
-          warnings: false
-        }
-      })
-    );
-  }
-
-  return config;
 }
 
-['axios', 'axios.min'].forEach(function (key) {
-  config[key] = generateConfig(key);
+['axios', 'axios.min'].forEach(outputScript => {
+  config[outputScript] = generateConfig(outputScript);
 });
 
 module.exports = config;