reformat code using prettier, add related dependencies

.babelrc

@@ -35,14 +35,10 @@
             ]
         },
         "cjs": {
-            "presets": [
-                "@babel/preset-env"
-            ]
+            "presets": ["@babel/preset-env"]
         },
         "test": {
-            "plugins": [
-                "@babel/plugin-transform-modules-commonjs"
-            ]
+            "plugins": ["@babel/plugin-transform-modules-commonjs"]
         }
     }
 }

.codecov.yml

@@ -1,2 +1,2 @@
 codecov:
-  #branch: master
+    #branch: master

.editorconfig

@@ -0,0 +1,10 @@
+root = true
+
+[*]
+indent_size = 4
+indent_style = space
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.json]
+indent_size = 2

.eslintrc.js

@@ -0,0 +1,27 @@
+module.exports = {
+    extends: ['airbnb-base', 'plugin:prettier/recommended'],
+    parser: 'babel-eslint',
+    rules: {
+        'max-len': 0,
+        'id-length': 0,
+        'consistent-return': 1,
+        'class-methods-use-this': 0,
+        'comma-dangle': ['error', 'always-multiline'],
+        'no-unused-vars': ['error', { args: 'none' }],
+        'no-underscore-dangle': ['warn', { allowAfterThis: true }],
+        'no-param-reassign': ['error', { props: false }],
+        'no-prototype-builtins': 0,
+        'no-plusplus': 0,
+        'no-console': 0,
+        'prefer-rest-params': 0,
+        'import/no-named-as-default': 0,
+        'function-paren-newline': 0,
+        'operator-linebreak': 0,
+        'max-classes-per-file': ['warn', 1],
+    },
+    parserOptions: {
+        ecmaFeatures: {
+            ecmaVersion: 6,
+        },
+    },
+};

.prettierrc.js

@@ -0,0 +1,19 @@
+module.exports = {
+    tabWidth: 4,
+    semi: true,
+    singleQuote: false,
+    overrides: [
+        {
+            files: ["*.js", "*.mjs"],
+            options: {
+                trailingComma: "es5"
+            }
+        },
+        {
+            files: "*.json",
+            options: {
+                tabWidth: 2
+            }
+        }
+    ]
+};

gulpfile.js

@@ -1,12 +1,14 @@
-const { task, series, watch } = require('gulp');
-const apiDocs = require('./tasks/api-docs');
+const { task, series, watch } = require("gulp");
+
+const apiDocs = require("./tasks/api-docs");
+
+task("api-docs:clean", apiDocs.clean);
+task("api-docs:build", apiDocs.build);
+const apiDocsAll = series("api-docs:clean", "api-docs:build");
 
-task('api-docs:clean', apiDocs.clean);
-task('api-docs:build', apiDocs.build);
-const apiDocsAll = series('api-docs:clean', 'api-docs:build');
 function apiDocsWatch() {
-    watch(['src/**/*.js', 'tasks/api-docs/**/*'], apiDocsAll);
+    watch(["src/**/*.js", "tasks/api-docs/**/*"], apiDocsAll);
 }
 
-exports['api-docs'] = apiDocsAll;
-exports['api-docs:watch'] = apiDocsWatch;
+exports["api-docs"] = apiDocsAll;
+exports["api-docs:watch"] = apiDocsWatch;

jest.config.js

@@ -1,31 +1,26 @@
-const path = require('path');
+const path = require("path");
 
 module.exports = {
-    rootDir: path.resolve('./src/'),
-    testRegex: 'test/(.*)/(.*)\\.(js)',
-    moduleFileExtensions: ['js', 'json'],
+    rootDir: path.resolve("./src/"),
+    testRegex: "test/(.*)/(.*)\\.(js)",
+    moduleFileExtensions: ["js", "json"],
     testPathIgnorePatterns: [
-        'test/functional/es5\\.(js)',
-        'test/functional/performance\\.(js)',
+        "test/functional/es5\\.(js)",
+        "test/functional/performance\\.(js)",
     ],
     transform: {
-        '\\.js$': 'babel-jest',
+        "\\.js$": "babel-jest",
     },
-    coverageDirectory: '../coverage/',
+    coverageDirectory: "../coverage/",
     collectCoverage: true,
-    collectCoverageFrom: [
-        '*.js',
-        '*/*.js',
-    ],
-    coveragePathIgnorePatterns: [
-        'test/*',
-    ],
+    collectCoverageFrom: ["*.js", "*/*.js"],
+    coveragePathIgnorePatterns: ["test/*"],
     coverageThreshold: {
         global: {
-            branches: 75,
-            functions: 80,
-            lines: 85,
-            statements: 85,
+            branches: 95,
+            functions: 100,
+            lines: 99,
+            statements: 99,
         },
     },
 };

jest.es5.config.js

@@ -1,9 +1,9 @@
-const path = require('path');
+const path = require("path");
 
 module.exports = {
-    rootDir: path.resolve('./src/'),
-    testRegex: 'test/functional/es5\\.(js)',
-    moduleFileExtensions: ['js', 'json'],
+    rootDir: path.resolve("./src/"),
+    testRegex: "test/functional/es5\\.(js)",
+    moduleFileExtensions: ["js", "json"],
     transform: {},
     collectCoverage: false,
 };

jest.perf.config.js

@@ -1,11 +1,11 @@
-const path = require('path');
+const path = require("path");
 
 module.exports = {
-    rootDir: path.resolve('./src/'),
-    testRegex: 'test/functional/performance\\.(js)',
-    moduleFileExtensions: ['js', 'json'],
+    rootDir: path.resolve("./src/"),
+    testRegex: "test/functional/performance\\.(js)",
+    moduleFileExtensions: ["js", "json"],
     transform: {
-        '\\.js$': 'babel-jest',
+        "\\.js$": "babel-jest",
     },
     collectCoverage: false,
     verbose: true,

jsdoc.conf.json

@@ -1,20 +1,18 @@
 {
-    "tags": {
-        "allowUnknownTags": true,
-        "dictionaries": ["jsdoc","closure"]
-    },
-    "source": {
-        "includePattern": ".+\\.js(doc)?$",
-        "excludePattern": "test"
-    },
-    "markdown": {
-        "hardwrap": true
-    },
-    "plugins": [
-        "plugins/markdown"
-    ],
-    "templates": {
-        "cleverLinks": true,
-        "monospaceLinks": false
-    }
+  "tags": {
+    "allowUnknownTags": true,
+    "dictionaries": ["jsdoc", "closure"]
+  },
+  "source": {
+    "includePattern": ".+\\.js(doc)?$",
+    "excludePattern": "test"
+  },
+  "markdown": {
+    "hardwrap": true
+  },
+  "plugins": ["plugins/markdown"],
+  "templates": {
+    "cleverLinks": true,
+    "monospaceLinks": false
+  }
 }

package.json

@@ -64,8 +64,10 @@
     "deep-freeze": "0.0.1",
     "eslint": "^6.3.0",
     "eslint-config-airbnb-base": "^14.0.0",
+    "eslint-config-prettier": "^6.3.0",
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-jest": "^22.17.0",
+    "eslint-plugin-prettier": "^3.1.1",
     "gulp": "^4.0.2",
     "gulp-clean": "^0.4.0",
     "gulp-gh-pages": "https://github.com/tekd/gulp-gh-pages/tarball/9ebafeb4011982c98038d8e90373fe7ed91e3f88",
@@ -75,6 +77,7 @@
     "jsdoc": "^3.6.3",
     "jsdoc-to-markdown": "^5.0.0",
     "lodash-webpack-plugin": "^0.11.5",
+    "prettier": "^1.18.2",
     "rimraf": "^3.0.0",
     "webpack": "^4.39.3",
     "webpack-cli": "^3.3.8",