[eslint config] [*] [refactor] use object spread instead of Object.assign

Author: ljharb

packages/eslint-config-airbnb-base/package.json

@@ -88,7 +88,6 @@
   },
   "dependencies": {
     "confusing-browser-globals": "^1.0.11",
-    "object.assign": "^4.1.4",
     "object.entries": "^1.1.5"
   }
 }

packages/eslint-config-airbnb-base/whitespace-async.js

@@ -1,6 +1,5 @@
 #!/usr/bin/env node
 
-const assign = require('object.assign');
 const entries = require('object.entries');
 const { ESLint } = require('eslint');
 
@@ -20,7 +19,7 @@ function getSeverity(ruleConfig) {
 }
 
 async function onlyErrorOnRules(rulesToError, config) {
-  const errorsOnly = assign({}, config);
+  const errorsOnly = { ...config };
   const cli = new ESLint({
     useEslintrc: false,
     baseConfig: config

packages/eslint-config-airbnb-base/whitespace.js

@@ -4,7 +4,6 @@ const { CLIEngine } = require('eslint');
 
 if (CLIEngine) {
   /* eslint no-inner-declarations: 0 */
-  const assign = require('object.assign');
   const entries = require('object.entries');
   const whitespaceRules = require('./whitespaceRules');
 
@@ -23,7 +22,7 @@ if (CLIEngine) {
   }
 
   function onlyErrorOnRules(rulesToError, config) {
-    const errorsOnly = assign({}, config);
+    const errorsOnly = { ...config };
     const cli = new CLIEngine({ baseConfig: config, useEslintrc: false });
     const baseRules = cli.getConfigForFile(require.resolve('./')).rules;
 

packages/eslint-config-airbnb/package.json

@@ -67,7 +67,6 @@
   "homepage": "https://github.com/airbnb/javascript",
   "dependencies": {
     "eslint-config-airbnb-base": "^15.0.0",
-    "object.assign": "^4.1.4",
     "object.entries": "^1.1.5"
   },
   "devDependencies": {

packages/eslint-config-airbnb/rules/react.js

@@ -1,4 +1,3 @@
-const assign = require('object.assign');
 const baseStyleRules = require('eslint-config-airbnb-base/rules/style').rules;
 
 const dangleRules = baseStyleRules['no-underscore-dangle'];
@@ -17,9 +16,10 @@ module.exports = {
   // View link below for react rules documentation
   // https://github.com/jsx-eslint/eslint-plugin-react#list-of-supported-rules
   rules: {
-    'no-underscore-dangle': [dangleRules[0], assign({}, dangleRules[1], {
+    'no-underscore-dangle': [dangleRules[0], {
+      ...dangleRules[1],
       allow: dangleRules[1].allow.concat(['__REDUX_DEVTOOLS_EXTENSION_COMPOSE__']),
-    })],
+    }],
 
     // Specify whether double or single quotes should be used in JSX attributes
     // https://eslint.org/docs/rules/jsx-quotes

packages/eslint-config-airbnb/whitespace-async.js

@@ -1,6 +1,5 @@
 #!/usr/bin/env node
 
-const assign = require('object.assign');
 const entries = require('object.entries');
 const { ESLint } = require('eslint');
 
@@ -20,7 +19,7 @@ function getSeverity(ruleConfig) {
 }
 
 async function onlyErrorOnRules(rulesToError, config) {
-  const errorsOnly = assign({}, config);
+  const errorsOnly = { ...config };
   const cli = new ESLint({
     useEslintrc: false,
     baseConfig: config

packages/eslint-config-airbnb/whitespace.js

@@ -4,7 +4,6 @@ const { CLIEngine } = require('eslint');
 
 if (CLIEngine) {
   /* eslint no-inner-declarations: 0 */
-  const assign = require('object.assign');
   const entries = require('object.entries');
   const whitespaceRules = require('./whitespaceRules');
 
@@ -23,7 +22,7 @@ if (CLIEngine) {
   }
 
   function onlyErrorOnRules(rulesToError, config) {
-    const errorsOnly = assign({}, config);
+    const errorsOnly = { ...config };
     const cli = new CLIEngine({ baseConfig: config, useEslintrc: false });
     const baseRules = cli.getConfigForFile(require.resolve('./')).rules;