diff --git a/.eslintrc.json b/.eslintrc.json
new file mode 100644
index 0000000..2a576e2
--- /dev/null
+++ b/.eslintrc.json
@@ -0,0 +1,11 @@
+{
+  "env": {
+    "browser": true,
+    "node": true,
+    "jest/globals": true
+  },
+  "extends": "airbnb",
+  "plugins": [
+    "jest"
+  ]
+}
diff --git a/.gitignore b/.gitignore
index 8665818..784948f 100755
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,6 @@
 
 # Ignore npm files
 node_modules
-npm-debug.log
 
 # Ignore compiled sources
 aio
diff --git a/.npmignore b/.npmignore
index b825ce5..df84a06 100644
--- a/.npmignore
+++ b/.npmignore
@@ -5,7 +5,6 @@
 # Ignore build settings
 .babelrc
 gulpfile.js
-npm-debug.log
 webpack.config.js
 
 # Ignore sources
diff --git a/gulpfile.js b/gulpfile.js
index 81b74a3..595ff40 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -15,36 +15,47 @@
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
+ *
  */
 
-const gulp = require("gulp");
-const babel = require("gulp-babel");
-const stripComments = require("gulp-strip-comments");
-const watch = require("gulp-watch");
-const distPath = "dist";
-
-// Compile JavaScript files
-gulp.task("build", () => {
-    return gulp.src([
-        "src/**/*.js"
-    ])
-        .pipe(babel({presets: ["env"]}))
-        .pipe(stripComments())
-        .pipe(gulp.dest(distPath));
-});
+const babel = require('gulp-babel');
+const del = require('del');
+const eslint = require('gulp-eslint');
+const gulp = require('gulp');
+const watch = require('gulp-watch');
 
-// Compile source files
-gulp.task("default", ["build"]);
+const buildPath = 'dist';
+
+// Compile JS files
+gulp.task('build', () => gulp.src([
+  'src/**/*.js',
+])
+  .pipe(babel())
+  .pipe(gulp.dest(buildPath)));
+
+// Remove compiled files
+gulp.task('clean', () => del([buildPath]));
+
+// Check code quality
+gulp.task('eslint', () => gulp.src([
+  'src/**/*.js',
+  'test/**/*.js',
+  '!node_modules/**',
+])
+  .pipe(eslint())
+  .pipe(eslint.formatEach())
+  .pipe(eslint.failAfterError()));
 
 // Prepare files for publication
-gulp.task("prepublish", ["build"]);
+gulp.task('prepublish', gulp.series('clean', 'eslint', 'build'));
 
 // Rebuild automatically
-gulp.task("watch", () => {
-    gulp.watch(["src/**/*.js"], ["build"]);
-});
+gulp.task('watch', () => watch(['src/**/*.js'], ['build']));
+
+// Compile source files
+gulp.task('default', gulp.series('prepublish'));
diff --git a/package-lock.json b/package-lock.json
index ee07da1..cc99826 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -60,6 +60,23 @@
         }
       }
     },
+    "acorn-jsx": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-3.0.1.tgz",
+      "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
+      "dev": true,
+      "requires": {
+        "acorn": "3.3.0"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "3.3.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
+          "integrity": "sha1-ReN/s56No/JbruP/U2niu18iAXo=",
+          "dev": true
+        }
+      }
+    },
     "ajv": {
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.2.0.tgz",
@@ -164,6 +181,15 @@
         "normalize-path": "2.1.1"
       }
     },
+    "append-buffer": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/append-buffer/-/append-buffer-1.0.2.tgz",
+      "integrity": "sha1-2CIM9GYIFSXv6lBhTz3mUU36WPE=",
+      "dev": true,
+      "requires": {
+        "buffer-equal": "1.0.0"
+      }
+    },
     "append-transform": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/append-transform/-/append-transform-0.4.0.tgz",
@@ -188,18 +214,46 @@
         "sprintf-js": "1.0.3"
       }
     },
+    "aria-query": {
+      "version": "0.7.1",
+      "resolved": "https://registry.npmjs.org/aria-query/-/aria-query-0.7.1.tgz",
+      "integrity": "sha1-Jsu1r/ZBRLCoJb4YRuCxbPoAsR4=",
+      "dev": true,
+      "requires": {
+        "ast-types-flow": "0.0.7",
+        "commander": "2.15.1"
+      }
+    },
     "arr-diff": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
       "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=",
       "dev": true
     },
+    "arr-filter": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/arr-filter/-/arr-filter-1.1.2.tgz",
+      "integrity": "sha1-Q/3d0JHo7xGqTEXZzcGOLf8XEe4=",
+      "dev": true,
+      "requires": {
+        "make-iterator": "1.0.0"
+      }
+    },
     "arr-flatten": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.1.0.tgz",
       "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==",
       "dev": true
     },
+    "arr-map": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/arr-map/-/arr-map-2.0.2.tgz",
+      "integrity": "sha1-Onc0X/wc814qkYJWAfnljy4kysQ=",
+      "dev": true,
+      "requires": {
+        "make-iterator": "1.0.0"
+      }
+    },
     "arr-union": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
@@ -224,12 +278,85 @@
       "integrity": "sha1-jCpe8kcv2ep0KwTHenUJO6J1fJM=",
       "dev": true
     },
+    "array-includes": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/array-includes/-/array-includes-3.0.3.tgz",
+      "integrity": "sha1-GEtI9i2S10UrsxsyMWXH+L0CJm0=",
+      "dev": true,
+      "requires": {
+        "define-properties": "1.1.2",
+        "es-abstract": "1.11.0"
+      }
+    },
+    "array-initial": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/array-initial/-/array-initial-1.1.0.tgz",
+      "integrity": "sha1-L6dLJnOTccOUe9enrcc74zSz15U=",
+      "dev": true,
+      "requires": {
+        "array-slice": "1.1.0",
+        "is-number": "4.0.0"
+      },
+      "dependencies": {
+        "is-number": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/is-number/-/is-number-4.0.0.tgz",
+          "integrity": "sha512-rSklcAIlf1OmFdyAqbnWTLVelsQ58uvZ66S/ZyawjWqIviTWCjg2PzVGw8WUA+nNuPTqb4wgA+NszrJ+08LlgQ==",
+          "dev": true
+        }
+      }
+    },
+    "array-last": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/array-last/-/array-last-1.3.0.tgz",
+      "integrity": "sha512-eOCut5rXlI6aCOS7Z7kCplKRKyiFQ6dHFBem4PwlwKeNFk2/XxTrhRh5T9PyaEWGy/NHTZWbY+nsZlNFJu9rYg==",
+      "dev": true,
+      "requires": {
+        "is-number": "4.0.0"
+      },
+      "dependencies": {
+        "is-number": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/is-number/-/is-number-4.0.0.tgz",
+          "integrity": "sha512-rSklcAIlf1OmFdyAqbnWTLVelsQ58uvZ66S/ZyawjWqIviTWCjg2PzVGw8WUA+nNuPTqb4wgA+NszrJ+08LlgQ==",
+          "dev": true
+        }
+      }
+    },
     "array-slice": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/array-slice/-/array-slice-1.1.0.tgz",
       "integrity": "sha512-B1qMD3RBP7O8o0H2KbrXDyB0IccejMF15+87Lvlor12ONPRHP6gTjXMNkt/d3ZuOGbAe66hFmaCfECI24Ufp6w==",
       "dev": true
     },
+    "array-sort": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/array-sort/-/array-sort-1.0.0.tgz",
+      "integrity": "sha512-ihLeJkonmdiAsD7vpgN3CRcx2J2S0TiYW+IS/5zHBI7mKUq3ySvBdzzBfD236ubDBQFiiyG3SWCPc+msQ9KoYg==",
+      "dev": true,
+      "requires": {
+        "default-compare": "1.0.0",
+        "get-value": "2.0.6",
+        "kind-of": "5.1.0"
+      },
+      "dependencies": {
+        "kind-of": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-5.1.0.tgz",
+          "integrity": "sha512-NGEErnH6F2vUuXDh+OlbcKW7/wOcfdRHaZ7VWtqCztfHri/++YKmP51OdWeGPuqCOba6kk2OTe5d02VmTB80Pw==",
+          "dev": true
+        }
+      }
+    },
+    "array-union": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
+      "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
+      "dev": true,
+      "requires": {
+        "array-uniq": "1.0.3"
+      }
+    },
     "array-uniq": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/array-uniq/-/array-uniq-1.0.3.tgz",
@@ -248,6 +375,12 @@
       "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
       "dev": true
     },
+    "asap": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
+      "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY=",
+      "dev": true
+    },
     "asn1": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz",
@@ -286,6 +419,12 @@
       "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c=",
       "dev": true
     },
+    "ast-types-flow": {
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/ast-types-flow/-/ast-types-flow-0.0.7.tgz",
+      "integrity": "sha1-9wtzXGvKGlycItmCw+Oef+ujva0=",
+      "dev": true
+    },
     "astral-regex": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-1.0.0.tgz",
@@ -301,12 +440,41 @@
         "lodash": "4.17.5"
       }
     },
+    "async-done": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/async-done/-/async-done-1.2.4.tgz",
+      "integrity": "sha512-mxc+yISkb0vjsuvG3dJCIZXzRWjKndQ9Zo9zNDJ1K2wh9eP0E0oGmOWm+4cFOvW4dA0tGFImTW5tQJHCtn1kIQ==",
+      "dev": true,
+      "requires": {
+        "end-of-stream": "1.4.1",
+        "once": "1.3.3",
+        "process-nextick-args": "1.0.7",
+        "stream-exhaust": "1.0.2"
+      },
+      "dependencies": {
+        "process-nextick-args": {
+          "version": "1.0.7",
+          "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-1.0.7.tgz",
+          "integrity": "sha1-FQ4gt1ZZCtP5EJPyWk8q2L/zC6M=",
+          "dev": true
+        }
+      }
+    },
     "async-each": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.1.tgz",
       "integrity": "sha1-GdOGodntxufByF04iu28xW0zYC0=",
       "dev": true
     },
+    "async-settle": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/async-settle/-/async-settle-1.0.0.tgz",
+      "integrity": "sha1-HQqRS7Aldb7IqPOnTlCA9yssDGs=",
+      "dev": true,
+      "requires": {
+        "async-done": "1.2.4"
+      }
+    },
     "asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
@@ -331,6 +499,15 @@
       "integrity": "sha1-g+9cqGCysy5KDe7e6MdxudtXRx4=",
       "dev": true
     },
+    "axobject-query": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/axobject-query/-/axobject-query-0.1.0.tgz",
+      "integrity": "sha1-YvWdvFnJ+SQnWco0mWDnov48NsA=",
+      "dev": true,
+      "requires": {
+        "ast-types-flow": "0.0.7"
+      }
+    },
     "babel-code-frame": {
       "version": "6.26.0",
       "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
@@ -1017,6 +1194,23 @@
       "integrity": "sha512-q/UEjfGJ2Cm3oKV71DJz9d25TPnq5rhBVL2Q4fA5wcC3jcrdn7+SssEybFIxwAvvP+YCsCYNKughoF33GxgycQ==",
       "dev": true
     },
+    "bach": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/bach/-/bach-1.2.0.tgz",
+      "integrity": "sha1-Szzpa/JxNPeaG0FKUcFONMO9mIA=",
+      "dev": true,
+      "requires": {
+        "arr-filter": "1.1.2",
+        "arr-flatten": "1.1.0",
+        "arr-map": "2.0.2",
+        "array-each": "1.0.1",
+        "array-initial": "1.1.0",
+        "array-last": "1.3.0",
+        "async-done": "1.2.4",
+        "async-settle": "1.0.0",
+        "now-and-later": "2.0.0"
+      }
+    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
@@ -1283,6 +1477,18 @@
         "isarray": "1.0.0"
       }
     },
+    "buffer-equal": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/buffer-equal/-/buffer-equal-1.0.0.tgz",
+      "integrity": "sha1-WWFrSYME1Var1GaWayLu2j7KX74=",
+      "dev": true
+    },
+    "buffer-from": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.0.0.tgz",
+      "integrity": "sha512-83apNb8KK0Se60UE1+4Ukbe3HbfELJ6UlI4ldtOGs7So4KD26orJM8hIY9lxdzP+UpItH1Yh/Y8GUvNFWFFRxA==",
+      "dev": true
+    },
     "buffer-xor": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/buffer-xor/-/buffer-xor-1.0.3.tgz",
@@ -1318,6 +1524,23 @@
         "unset-value": "1.0.0"
       }
     },
+    "caller-path": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/caller-path/-/caller-path-0.1.0.tgz",
+      "integrity": "sha1-lAhe9jWB7NPaqSREqP6U6CV3dR8=",
+      "dev": true,
+      "requires": {
+        "callsites": "0.2.0"
+      },
+      "dependencies": {
+        "callsites": {
+          "version": "0.2.0",
+          "resolved": "https://registry.npmjs.org/callsites/-/callsites-0.2.0.tgz",
+          "integrity": "sha1-r6uWJikQp/M8GaV3WCXGnzTjUMo=",
+          "dev": true
+        }
+      }
+    },
     "callsites": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/callsites/-/callsites-2.0.0.tgz",
@@ -1373,6 +1596,12 @@
         }
       }
     },
+    "chardet": {
+      "version": "0.4.2",
+      "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.4.2.tgz",
+      "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=",
+      "dev": true
+    },
     "chokidar": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.0.2.tgz",
@@ -1409,6 +1638,12 @@
         "safe-buffer": "5.1.1"
       }
     },
+    "circular-json": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/circular-json/-/circular-json-0.3.3.tgz",
+      "integrity": "sha512-UZK3NBx2Mca+b5LsG7bY183pHWt5Y1xts4P3Pz7ENTwGVnJOUWbRb3ocjvX7hx9tq/yTAdclXm9sZ38gNuem4A==",
+      "dev": true
+    },
     "class-utils": {
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
@@ -1489,6 +1724,21 @@
         }
       }
     },
+    "cli-cursor": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-2.1.0.tgz",
+      "integrity": "sha1-s12sN2R5+sw+lHR9QdDQ9SOP/LU=",
+      "dev": true,
+      "requires": {
+        "restore-cursor": "2.0.0"
+      }
+    },
+    "cli-width": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/cli-width/-/cli-width-2.2.0.tgz",
+      "integrity": "sha1-/xnt6Kml5XkyQUewwR8PvLq+1jk=",
+      "dev": true
+    },
     "cliui": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-2.1.0.tgz",
@@ -1549,6 +1799,17 @@
       "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
       "dev": true
     },
+    "collection-map": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/collection-map/-/collection-map-1.0.0.tgz",
+      "integrity": "sha1-rqDwb40mx4DCt1SUOFVEsiVa8Yw=",
+      "dev": true,
+      "requires": {
+        "arr-map": "2.0.2",
+        "for-own": "1.0.0",
+        "make-iterator": "1.0.0"
+      }
+    },
     "collection-visit": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/collection-visit/-/collection-visit-1.0.0.tgz",
@@ -1589,6 +1850,12 @@
         "delayed-stream": "1.0.0"
       }
     },
+    "commander": {
+      "version": "2.15.1",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
+      "integrity": "sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==",
+      "dev": true
+    },
     "commondir": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/commondir/-/commondir-1.0.1.tgz",
@@ -1607,6 +1874,18 @@
       "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
       "dev": true
     },
+    "concat-stream": {
+      "version": "1.6.2",
+      "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-1.6.2.tgz",
+      "integrity": "sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==",
+      "dev": true,
+      "requires": {
+        "buffer-from": "1.0.0",
+        "inherits": "2.0.3",
+        "readable-stream": "2.3.4",
+        "typedarray": "0.0.6"
+      }
+    },
     "console-browserify": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-browserify/-/console-browserify-1.1.0.tgz",
@@ -1622,6 +1901,12 @@
       "integrity": "sha1-wguW2MYXdIqvHBYCF2DNJ/y4y3U=",
       "dev": true
     },
+    "contains-path": {
+      "version": "0.1.0",
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-          "resolved": "https://registry.npmjs.org/clone/-/clone-0.2.0.tgz",
-          "integrity": "sha1-xhJqkK1Pctv1rNskPMN3JP6T/B8=",
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/clone/-/clone-2.1.2.tgz",
+          "integrity": "sha1-G39Ln1kfHo+DZwQBYANFoCiHQ18=",
           "dev": true
         },
-        "graceful-fs": {
-          "version": "3.0.11",
-          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-3.0.11.tgz",
-          "integrity": "sha1-dhPHeKGv6mLyXGMKCG1/Osu92Bg=",
-          "dev": true,
-          "requires": {
-            "natives": "1.1.1"
-          }
+        "clone-stats": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/clone-stats/-/clone-stats-1.0.0.tgz",
+          "integrity": "sha1-s3gt/4u1R04Yuba/D9/ngvh3doA=",
+          "dev": true
         },
-        "isarray": {
-          "version": "0.0.1",
-          "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
-          "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
+        "replace-ext": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/replace-ext/-/replace-ext-1.0.0.tgz",
+          "integrity": "sha1-3mMSg3P8v3w8z6TeWkgMRaZ5WOs=",
           "dev": true
         },
-        "readable-stream": {
-          "version": "1.0.34",
-          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
-          "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
+        "vinyl": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-2.1.0.tgz",
+          "integrity": "sha1-Ah+cLPlR1rk5lDyJ617lrdT9kkw=",
           "dev": true,
           "requires": {
-            "core-util-is": "1.0.2",
-            "inherits": "2.0.3",
-            "isarray": "0.0.1",
-            "string_decoder": "0.10.31"
+            "clone": "2.1.2",
+            "clone-buffer": "1.0.0",
+            "clone-stats": "1.0.0",
+            "cloneable-readable": "1.0.0",
+            "remove-trailing-separator": "1.1.0",
+            "replace-ext": "1.0.0"
           }
-        },
-        "string_decoder": {
-          "version": "0.10.31",
-          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
-          "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
+        }
+      }
+    },
+    "vinyl-sourcemap": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/vinyl-sourcemap/-/vinyl-sourcemap-1.1.0.tgz",
+      "integrity": "sha1-kqgAWTo4cDqM2xHYswCtS+Y7PhY=",
+      "dev": true,
+      "requires": {
+        "append-buffer": "1.0.2",
+        "convert-source-map": "1.5.1",
+        "graceful-fs": "4.1.11",
+        "normalize-path": "2.1.1",
+        "now-and-later": "2.0.0",
+        "remove-bom-buffer": "3.0.0",
+        "vinyl": "2.1.0"
+      },
+      "dependencies": {
+        "clone": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/clone/-/clone-2.1.2.tgz",
+          "integrity": "sha1-G39Ln1kfHo+DZwQBYANFoCiHQ18=",
           "dev": true
         },
-        "strip-bom": {
+        "clone-stats": {
           "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-1.0.0.tgz",
-          "integrity": "sha1-hbiGLzhEtabV7IRnqTWYFzo295Q=",
-          "dev": true,
-          "requires": {
-            "first-chunk-stream": "1.0.0",
-            "is-utf8": "0.2.1"
-          }
+          "resolved": "https://registry.npmjs.org/clone-stats/-/clone-stats-1.0.0.tgz",
+          "integrity": "sha1-s3gt/4u1R04Yuba/D9/ngvh3doA=",
+          "dev": true
         },
-        "through2": {
-          "version": "0.6.5",
-          "resolved": "https://registry.npmjs.org/through2/-/through2-0.6.5.tgz",
-          "integrity": "sha1-QaucZ7KdVyCQcUEOHXp6lozTrUg=",
-          "dev": true,
-          "requires": {
-            "readable-stream": "1.0.34",
-            "xtend": "4.0.1"
-          }
+        "replace-ext": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/replace-ext/-/replace-ext-1.0.0.tgz",
+          "integrity": "sha1-3mMSg3P8v3w8z6TeWkgMRaZ5WOs=",
+          "dev": true
         },
         "vinyl": {
-          "version": "0.4.6",
-          "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-0.4.6.tgz",
-          "integrity": "sha1-LzVsh6VQolVGHza76ypbqL94SEc=",
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-2.1.0.tgz",
+          "integrity": "sha1-Ah+cLPlR1rk5lDyJ617lrdT9kkw=",
           "dev": true,
           "requires": {
-            "clone": "0.2.0",
-            "clone-stats": "0.0.1"
+            "clone": "2.1.2",
+            "clone-buffer": "1.0.0",
+            "clone-stats": "1.0.0",
+            "cloneable-readable": "1.0.0",
+            "remove-trailing-separator": "1.1.0",
+            "replace-ext": "1.0.0"
           }
         }
       }
@@ -9330,6 +10904,12 @@
         "iconv-lite": "0.4.19"
       }
     },
+    "whatwg-fetch": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.3.tgz",
+      "integrity": "sha1-nITsLc9oGH/wC8ZOEnS0QhduHIQ=",
+      "dev": true
+    },
     "whatwg-url": {
       "version": "4.8.0",
       "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-4.8.0.tgz",
@@ -9414,6 +10994,15 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
+    "write": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
+      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
+      "dev": true,
+      "requires": {
+        "mkdirp": "0.5.1"
+      }
+    },
     "write-file-atomic": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.3.0.tgz",
diff --git a/package.json b/package.json
index e4b7299..e3c1c8d 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   "bugs": {
     "url": "https://github.com/jalik/jk-logger/issues"
   },
-  "main": "dist/index.js",
+  "main": "dist/logger.js",
   "scripts": {
     "build": "./node_modules/.bin/gulp build",
     "build:prod": "./node_modules/.bin/gulp prepublish",
@@ -39,8 +39,16 @@
     "babel-loader": "^7.1.4",
     "babel-polyfill": "^6.26.0",
     "babel-preset-env": "^1.6.1",
-    "gulp": "^3.9.1",
+    "del": "^3.0.0",
+    "eslint": "^4.19.1",
+    "eslint-config-airbnb": "^16.1.0",
+    "eslint-plugin-import": "^2.9.0",
+    "eslint-plugin-jest": "^21.15.0",
+    "eslint-plugin-jsx-a11y": "^6.0.3",
+    "eslint-plugin-react": "^7.7.0",
+    "gulp": "^4.0.0",
     "gulp-babel": "^7.0.1",
+    "gulp-eslint": "^4.0.2",
     "gulp-strip-comments": "^2.5.2",
     "gulp-watch": "^5.0.0",
     "jest": "^21.2.1",
diff --git a/src/index.js b/src/index.js
deleted file mode 100755
index f035bcc..0000000
--- a/src/index.js
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2018 Karl STEIN
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-import Logger from "./logger";
-
-export default Logger;
diff --git a/src/logger.js b/src/logger.js
index dd84017..017c164 100644
--- a/src/logger.js
+++ b/src/logger.js
@@ -15,7 +15,7 @@
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
@@ -23,187 +23,202 @@
  *
  */
 
-import Observer from "@jalik/observer";
-import Types from "./types";
-import {extendRecursively} from "@jalik/extend";
-
-export class Logger {
-
-    constructor(options) {
-        this.options = extendRecursively({
-            active: true,
-            console: {
-                debug: true,
-                error: true,
-                info: true,
-                other: true,
-                warning: true
-            },
-            displayContext: false
-        }, options);
-
-        // Create observer
-        this._observer = new Observer(this);
-
-        // Check console availability
-        if (typeof console !== "object" || console === null) {
-            throw new Error("The console object is not available in this environment.");
-        }
-
-        // Add polyfill methods to the console object
-        if (typeof console.log === "function") {
-            if (typeof console.debug !== "function") {
-                console.debug = console.log;
-            }
-            if (typeof console.error !== "function") {
-                console.error = console.log;
-            }
-            if (typeof console.info !== "function") {
-                console.info = console.log;
-            }
-            if (typeof console.warn !== "function") {
-                console.warn = console.log;
-            }
-        }
-    }
-
-    /**
-     * Logs a debug message
-     * @param message
-     * @param context
-     */
-    debug(message, context) {
-        return this.log(message, Types.debug, context);
-    }
-
-    /**
-     * Logs an error message
-     * @param message
-     * @param context
-     */
-    error(message, context) {
-        if (message instanceof Error) {
-            context = context || {};
-            context.error = {};
-
-            const attributes = ["name", "message", "reason", "stack", "type"];
-
-            for (let i = 0; i < attributes.length; i += 1) {
-                if (attributes[i] in message) {
-                    context.error[attributes[i]] = message[attributes[i]];
-                }
-            }
-            message = message.message;
-        }
-        return this.log(message, Types.error, context);
-    }
-
-    /**
-     * Logs an information message
-     * @param message
-     * @param context
-     */
-    info(message, context) {
-        return this.log(message, Types.info, context);
+import { extendRecursively } from '@jalik/extend';
+import Observer from '@jalik/observer';
+import Types from './types';
+
+class Logger {
+  constructor(options) {
+    this.options = extendRecursively({
+      active: true,
+      console: {
+        debug: true,
+        error: true,
+        info: true,
+        other: true,
+        warning: true,
+      },
+      displayContext: false,
+    }, options);
+
+    // Create observer
+    this.observer = new Observer(this);
+
+    // Check console availability
+    if (typeof console !== 'object' || console === null) {
+      throw new Error('The console object is not available in this environment.');
     }
 
-    /**
-     * Checks if the logger is active
-     * @return {boolean}
-     */
-    isActive() {
-        return this.options.active === true;
+    // Add polyfill methods to the console object
+    // eslint-disable-next-line
+    if (typeof console.log === 'function') {
+      // eslint-disable-next-line
+      if (typeof console.debug !== 'function') {
+        // eslint-disable-next-line
+        console.debug = console.log;
+      }
+      // eslint-disable-next-line
+      if (typeof console.error !== 'function') {
+        // eslint-disable-next-line
+        console.error = console.log;
+      }
+      // eslint-disable-next-line
+      if (typeof console.info !== 'function') {
+        // eslint-disable-next-line
+        console.info = console.log;
+      }
+      // eslint-disable-next-line
+      if (typeof console.warn !== 'function') {
+        // eslint-disable-next-line
+        console.warn = console.log;
+      }
     }
-
-    /**
-     * Logs a message
-     * @param message
-     * @param type
-     * @param context
-     */
-    log(message, type, context) {
-        if (this.isActive()) {
-            const args = [message];
-
-            // Display context in console
-            if (typeof context !== "undefined" && this.options.displayContext === true) {
-                args.push(context);
-            }
-
-            // Displays the message in the console
-            switch (type) {
-                case Types.debug:
-                    if (this.options.console.debug === true) {
-                        console.debug.apply(this, args);
-                    }
-                    break;
-
-                case Types.error:
-                    if (this.options.console.error === true) {
-                        console.error.apply(this, args);
-                    }
-                    break;
-
-                case Types.info:
-                    if (this.options.console.info === true) {
-                        console.info.apply(this, args);
-                    }
-                    break;
-
-                case Types.warning:
-                    if (this.options.console.warning === true) {
-                        console.warn.apply(this, args);
-                    }
-                    break;
-
-                default:
-                    if ((typeof this.options.console[type] === "boolean"
-                            && this.options.console[type] === true)
-                        || (typeof this.options.console[type] !== "boolean"
-                            && this.options.console.other === true)) {
-                        console.log.apply(this, args);
-                    }
-            }
+  }
+
+  /**
+   * Logs a debug message
+   * @param message
+   * @param context
+   */
+  debug(message, context) {
+    return this.log(message, Types.debug, context);
+  }
+
+  /**
+   * Logs an error message
+   * @param messageOrError
+   * @param context
+   */
+  error(messageOrError, context) {
+    // eslint-disable-next-line
+    const ctx = context || {};
+    let msg = messageOrError;
+
+    if (messageOrError instanceof Error) {
+      // eslint-disable-next-line
+      ctx.error = {};
+
+      const attributes = ['name', 'message', 'reason', 'stack', 'type'];
+
+      for (let i = 0; i < attributes.length; i += 1) {
+        if (attributes[i] in messageOrError) {
+          // eslint-disable-next-line
+          ctx.error[attributes[i]] = messageOrError[attributes[i]];
         }
-
-        // Notify all listeners
-        this._observer.notify(type, ...[message, context]);
+      }
+      // eslint-disable-next-line
+      const { message } = messageOrError;
+      msg = message;
     }
-
-    /**
-     * Removes an event listener
-     * @param event
-     * @param callback
-     */
-    off(event, callback) {
-        this._observer.detach(event, callback);
+    return this.log(msg, Types.error, ctx);
+  }
+
+  /**
+   * Logs an information message
+   * @param message
+   * @param context
+   */
+  info(message, context) {
+    return this.log(message, Types.info, context);
+  }
+
+  /**
+   * Checks if the logger is active
+   * @return {boolean}
+   */
+  isActive() {
+    return this.options.active === true;
+  }
+
+  /**
+   * Logs a message
+   * @param message
+   * @param type
+   * @param context
+   */
+  log(message, type, context) {
+    if (this.isActive()) {
+      const args = [message];
+
+      // Display context in console
+      if (typeof context !== 'undefined' && this.options.displayContext === true) {
+        args.push(context);
+      }
+
+      // Displays the message in the console
+      switch (type) {
+        case Types.debug:
+          if (this.options.console.debug === true) {
+            console.log.apply(this, args);
+          }
+          break;
+
+        case Types.error:
+          if (this.options.console.error === true) {
+            console.error.apply(this, args);
+          }
+          break;
+
+        case Types.info:
+          if (this.options.console.info === true) {
+            console.info.apply(this, args);
+          }
+          break;
+
+        case Types.warning:
+          if (this.options.console.warning === true) {
+            console.warn.apply(this, args);
+          }
+          break;
+
+        default:
+          if ((typeof this.options.console[type] === 'boolean'
+            && this.options.console[type] === true)
+            || (typeof this.options.console[type] !== 'boolean'
+              && this.options.console.other === true)) {
+            console.log.apply(this, args);
+          }
+      }
     }
 
-    /**
-     * Adds an event listener
-     * @param event
-     * @param callback
-     */
-    on(event, callback) {
-        this._observer.attach(event, callback);
-    }
-
-    /**
-     * Activates or deactivates the logger
-     * @param active
-     */
-    setActive(active) {
-        this.options.active = (active === true);
-    }
-
-    /**
-     * Logs a warning message
-     * @param message
-     * @param context
-     */
-    warn(message, context) {
-        return this.log(message, Types.warning, context);
-    }
+    // Notify all listeners
+    this.observer.notify(type, ...[message, context]);
+  }
+
+  /**
+   * Removes an event listener
+   * @param event
+   * @param callback
+   */
+  off(event, callback) {
+    this.observer.detach(event, callback);
+  }
+
+  /**
+   * Adds an event listener
+   * @param event
+   * @param callback
+   */
+  on(event, callback) {
+    this.observer.attach(event, callback);
+  }
+
+  /**
+   * Activates or deactivates the logger
+   * @param active
+   */
+  setActive(active) {
+    this.options.active = (active === true);
+  }
+
+  /**
+   * Logs a warning message
+   * @param message
+   * @param context
+   */
+  warn(message, context) {
+    return this.log(message, Types.warning, context);
+  }
 }
 
 export default Logger;
diff --git a/src/types.js b/src/types.js
index 907273b..e03d2cc 100644
--- a/src/types.js
+++ b/src/types.js
@@ -15,7 +15,7 @@
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
@@ -24,24 +24,20 @@
  */
 
 export default {
-
-    /**
-     * Debug
-     */
-    debug: "debug",
-
-    /**
-     * Error
-     */
-    error: "error",
-
-    /**
-     * Information
-     */
-    info: "info",
-
-    /**
-     * Warning
-     */
-    warning: "warning",
-}
+  /**
+   * Debug
+   */
+  debug: 'debug',
+  /**
+   * Error
+   */
+  error: 'error',
+  /**
+   * Information
+   */
+  info: 'info',
+  /**
+   * Warning
+   */
+  warning: 'warning',
+};
diff --git a/test/index.test.js b/test/index.test.js
deleted file mode 100755
index ee9076e..0000000
--- a/test/index.test.js
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2018 Karl STEIN
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-import Index from "../dist/index";
-import Logger from "../dist/logger";
-
-describe(`Logger`, () => {
-    it(`should be importable from package`, () => {
-        expect(typeof Logger).toEqual("function");
-    });
-    it(`should be importable from index`, () => {
-        expect(typeof Index).toEqual("function");
-    });
-});
diff --git a/test/logger.test.js b/test/logger.test.js
index 95d7dcd..f101574 100644
--- a/test/logger.test.js
+++ b/test/logger.test.js
@@ -15,7 +15,7 @@
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
@@ -23,216 +23,198 @@
  *
  */
 
-import Logger from "../src/index";
-import Types from "../src/types";
+import Logger from '../src/logger';
+import Types from '../src/types';
 
-describe("Logger", () => {
-
-    it(`should be importable from package`, () => {
-        expect(typeof Logger).toEqual("function");
-    });
+describe('Logger', () => {
+  it('should be importable from package', () => {
+    expect(typeof Logger).toEqual('function');
+  });
 });
 
-describe("new Logger({active: true})", () => {
-
-    it(`should create an active logger`, () => {
-        const logger = new Logger({active: true});
-        expect(logger.isActive()).toEqual(true);
-    });
+describe('new Logger({active: true})', () => {
+  it('should create an active logger', () => {
+    const logger = new Logger({ active: true });
+    expect(logger.isActive()).toEqual(true);
+  });
 });
 
-describe("new Logger({active: false})", () => {
-
-    it(`should create an inactive logger`, () => {
-        const logger = new Logger({active: false});
-        expect(logger.isActive()).toEqual(false);
-    });
+describe('new Logger({active: false})', () => {
+  it('should create an inactive logger', () => {
+    const logger = new Logger({ active: false });
+    expect(logger.isActive()).toEqual(false);
+  });
 });
 
-describe("Logger.debug(String, Object)", () => {
-
-    it(`should log a debug message`, () => {
-        let text = null;
-        const msg = "Hello World";
-        const logMessage = "msg = " + msg;
-        const logger = new Logger({active: true});
-        logger.on(Types.debug, (message) => {
-            text = message;
-        });
-        logger.debug(logMessage, {msg: msg});
-        expect(text).toEqual(logMessage);
-    });
+describe('Logger.debug(String, Object)', () => {
+  it('should log a debug message', () => {
+    let text = null;
+    const msg = 'Hello World';
+    const logMessage = `msg = ${msg}`;
+    const logger = new Logger({ active: true });
+    logger.on(Types.debug, (message) => {
+      text = message;
+    });
+    logger.debug(logMessage, { msg });
+    expect(text).toEqual(logMessage);
+  });
 });
 
-describe("Logger.error(String, Object)", () => {
-
-    it(`should log an error message`, () => {
-        let text = null;
-        const error = new Error("forbidden");
-        const logger = new Logger({active: true});
-        logger.on(Types.error, (message) => {
-            text = message;
-        });
-        logger.error(error.message, {error: error});
-        expect(text).toEqual(error.message);
-    });
+describe('Logger.error(String, Object)', () => {
+  it('should log an error message', () => {
+    let text = null;
+    const error = new Error('forbidden');
+    const logger = new Logger({ active: true });
+    logger.on(Types.error, (message) => {
+      text = message;
+    });
+    logger.error(error.message, { error });
+    expect(text).toEqual(error.message);
+  });
 });
 
-describe("Logger.error(Error, Object)", () => {
-
-    it(`should log an error message`, () => {
-        let text = null;
-        const error = new Error("forbidden");
-        const logger = new Logger({active: true});
-        logger.on(Types.error, (message) => {
-            text = message;
-        });
-        logger.error(error, {error: error});
-        expect(text).toEqual(error.message);
-    });
+describe('Logger.error(Error, Object)', () => {
+  it('should log an error message', () => {
+    let text = null;
+    const error = new Error('forbidden');
+    const logger = new Logger({ active: true });
+    logger.on(Types.error, (message) => {
+      text = message;
+    });
+    logger.error(error, { error });
+    expect(text).toEqual(error.message);
+  });
 });
 
-describe("Logger.info(String, Object)", () => {
-
-    it(`should log an info message`, () => {
-        let text = null;
-        const logMessage = "hello";
-        const logger = new Logger({active: true});
-        logger.on(Types.info, (message) => {
-            text = message;
-        });
-        logger.info(logMessage);
-        expect(text).toEqual(logMessage);
-    });
+describe('Logger.info(String, Object)', () => {
+  it('should log an info message', () => {
+    let text = null;
+    const logMessage = 'hello';
+    const logger = new Logger({ active: true });
+    logger.on(Types.info, (message) => {
+      text = message;
+    });
+    logger.info(logMessage);
+    expect(text).toEqual(logMessage);
+  });
 });
 
-describe("Logger.info(String, Object)", () => {
-
-    it(`should log a warning message`, () => {
-        let text = null;
-        const logMessage = "warning";
-        const logger = new Logger({active: true});
-        logger.on(Types.warning, (message) => {
-            text = message;
-        });
-        logger.warn(logMessage);
-        expect(text).toEqual(logMessage);
-    });
+describe('Logger.info(String, Object)', () => {
+  it('should log a warning message', () => {
+    let text = null;
+    const logMessage = 'warning';
+    const logger = new Logger({ active: true });
+    logger.on(Types.warning, (message) => {
+      text = message;
+    });
+    logger.warn(logMessage);
+    expect(text).toEqual(logMessage);
+  });
 });
 
-describe("Logger.isActive()", () => {
+describe('Logger.isActive()', () => {
+  it('should return true if the logger is active', () => {
+    const logger = new Logger({ active: true });
+    expect(logger.isActive()).toEqual(true);
+  });
 
-    it(`should return true if the logger is active`, () => {
-        const logger = new Logger({active: true});
-        expect(logger.isActive()).toEqual(true);
-    });
-
-    it(`should return true if the logger is not active`, () => {
-        const logger = new Logger({active: false});
-        expect(logger.isActive()).toEqual(false);
-    });
+  it('should return true if the logger is not active', () => {
+    const logger = new Logger({ active: false });
+    expect(logger.isActive()).toEqual(false);
+  });
 });
 
-describe("Logger.log(String, String, Object)", () => {
-
-    it(`should log a message`, () => {
-        let text = null;
-        const msg = "message";
-        const logger = new Logger({active: true});
-        logger.on(Types.info, (message) => {
-            text = message;
-        });
-        logger.log(msg, Types.info, {msg: msg});
-        expect(text).toEqual(msg);
-    });
-
-    it(`should log a message with context`, () => {
-        let context = null;
-        const logger = new Logger({active: true});
-        logger.on(Types.info, (message, ctx) => {
-            context = ctx;
-        });
-        logger.log("message", Types.info, {a: 1});
-        expect(context).toEqual({a: 1});
-    });
+describe('Logger.log(String, String, Object)', () => {
+  it('should log a message', () => {
+    let text = null;
+    const msg = 'message';
+    const logger = new Logger({ active: true });
+    logger.on(Types.info, (message) => {
+      text = message;
+    });
+    logger.log(msg, Types.info, { msg });
+    expect(text).toEqual(msg);
+  });
+
+  it('should log a message with context', () => {
+    let context = null;
+    const logger = new Logger({ active: true });
+    logger.on(Types.info, (message, ctx) => {
+      context = ctx;
+    });
+    logger.log('message', Types.info, { a: 1 });
+    expect(context).toEqual({ a: 1 });
+  });
 });
 
-describe(`Logger.on(String, Function)`, () => {
-
-    describe(`Logger.on("${Types.debug}", Function)`, () => {
-
-        it(`should execute a callback for ${Types.debug} messages`, () => {
-            let changed = false;
-            const logger = new Logger();
-
-            logger.on(Types.debug, () => {
-                changed = true;
-            });
-            logger.debug("this is a debug message");
-            expect(changed).toEqual(true);
-        });
-    });
-
-    describe(`Logger.on("${Types.error}", Function)`, () => {
-
-        it(`should execute a callback for ${Types.error} messages`, () => {
-            let changed = false;
-            const logger = new Logger();
-
-            logger.on(Types.error, () => {
-                changed = true;
-            });
-            logger.error("this is an error message");
-            expect(changed).toEqual(true);
-        });
-    });
-
-    describe(`Logger.on("${Types.info}", Function)`, () => {
-
-        it(`should execute a callback for ${Types.info} messages`, () => {
-            let changed = false;
-            const logger = new Logger();
-
-            logger.on(Types.info, () => {
-                changed = true;
-            });
-            logger.info("this is an information message");
-            expect(changed).toEqual(true);
-        });
-    });
-
-    describe(`Logger.on("${Types.warning}", Function)`, () => {
-
-        it(`should execute a callback for ${Types.warning} messages`, () => {
-            let changed = false;
-            const logger = new Logger();
-
-            logger.on(Types.warning, () => {
-                changed = true;
-            });
-            logger.warn("this is a warning message");
-            expect(changed).toEqual(true);
-        });
-    });
+describe('Logger.on(String, Function)', () => {
+  describe(`Logger.on("${Types.debug}", Function)`, () => {
+    it(`should execute a callback for ${Types.debug} messages`, () => {
+      let changed = false;
+      const logger = new Logger();
+
+      logger.on(Types.debug, () => {
+        changed = true;
+      });
+      logger.debug('this is a debug message');
+      expect(changed).toEqual(true);
+    });
+  });
+
+  describe(`Logger.on("${Types.error}", Function)`, () => {
+    it(`should execute a callback for ${Types.error} messages`, () => {
+      let changed = false;
+      const logger = new Logger();
+
+      logger.on(Types.error, () => {
+        changed = true;
+      });
+      logger.error('this is an error message');
+      expect(changed).toEqual(true);
+    });
+  });
+
+  describe(`Logger.on("${Types.info}", Function)`, () => {
+    it(`should execute a callback for ${Types.info} messages`, () => {
+      let changed = false;
+      const logger = new Logger();
+
+      logger.on(Types.info, () => {
+        changed = true;
+      });
+      logger.info('this is an information message');
+      expect(changed).toEqual(true);
+    });
+  });
+
+  describe(`Logger.on("${Types.warning}", Function)`, () => {
+    it(`should execute a callback for ${Types.warning} messages`, () => {
+      let changed = false;
+      const logger = new Logger();
+
+      logger.on(Types.warning, () => {
+        changed = true;
+      });
+      logger.warn('this is a warning message');
+      expect(changed).toEqual(true);
+    });
+  });
 });
 
-describe("Logger.setActive(Boolean)", () => {
-
-    describe("Logger.setActive(true)", () => {
-
-        it(`should activate a logger`, () => {
-            const logger = new Logger({active: false});
-            logger.setActive(true);
-            expect(logger.isActive()).toEqual(true);
-        });
+describe('Logger.setActive(Boolean)', () => {
+  describe('Logger.setActive(true)', () => {
+    it('should activate a logger', () => {
+      const logger = new Logger({ active: false });
+      logger.setActive(true);
+      expect(logger.isActive()).toEqual(true);
     });
+  });
 
-    describe("Logger.setActive(false)", () => {
-
-        it(`should deactivate a logger`, () => {
-            const logger = new Logger({active: true});
-            logger.setActive(false);
-            expect(logger.isActive()).toEqual(false);
-        });
+  describe('Logger.setActive(false)', () => {
+    it('should deactivate a logger', () => {
+      const logger = new Logger({ active: true });
+      logger.setActive(false);
+      expect(logger.isActive()).toEqual(false);
     });
+  });
 });
diff --git a/webpack.config.js b/webpack.config.js
index c3e092e..7878c63 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -15,43 +15,45 @@
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
+ *
  */
 
-const path = require("path");
-const Package = require("./package.json");
-const isProd = process.argv.indexOf("-p") !== -1;
-const filename = Package.name + (isProd ? ".min" : "");
+const path = require('path');
+const Package = require('./package.json');
+
+const isProd = process.argv.indexOf('-p') !== -1;
+const filename = Package.name + (isProd ? '.min' : '');
 
 const paths = {
-    dist: path.join(__dirname, "aio"),
-    src: path.join(__dirname, "src")
+  dist: path.join(__dirname, 'aio'),
+  src: path.join(__dirname, 'src'),
 };
 
 module.exports = {
-    entry: {
-        bundle: path.join(paths.src, "index.js")
-    },
-    module: {
-        rules: [
-            {
-                test: /\.js$/,
-                exclude: /node_modules/,
-                loader: "babel-loader"
-            }
-        ]
-    },
-    output: {
-        libraryTarget: "umd",
-        path: paths.dist,
-        filename: `${filename}.js`
-    },
-    resolve: {
-        extensions: [".js"],
-        modules: [paths.src, "node_modules"]
-    }
+  entry: {
+    bundle: path.join(paths.src, 'index.js'),
+  },
+  module: {
+    rules: [
+      {
+        test: /\.js$/,
+        exclude: /node_modules/,
+        loader: 'babel-loader',
+      },
+    ],
+  },
+  output: {
+    libraryTarget: 'umd',
+    path: paths.dist,
+    filename: `${filename}.js`,
+  },
+  resolve: {
+    extensions: ['.js'],
+    modules: [paths.src, 'node_modules'],
+  },
 };