diff --git a/.gitignore b/.gitignore
index 76efb07..a602f17 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 node_modules
 .vscode
+
+storybook-static
diff --git a/.storybook/addons.js b/.storybook/addons.js
index 6622fe4..3c785b3 100644
--- a/.storybook/addons.js
+++ b/.storybook/addons.js
@@ -1 +1 @@
-import '@storybook/addon-knobs/register';
+import '@storybook/addon-knobs/register'; // eslint-disable-line import/no-extraneous-dependencies
diff --git a/.storybook/config.js b/.storybook/config.js
index cffac93..4d6bf6c 100644
--- a/.storybook/config.js
+++ b/.storybook/config.js
@@ -1,6 +1,6 @@
-import { configure } from '@storybook/html';
+import { configure } from '@storybook/html'; // eslint-disable-line import/no-extraneous-dependencies
 
-import '../css/nes.min.css'
+import '../css/nes.min.css';
 
 // automatically import all files ending in *.stories.js
 const req = require.context('../docs', true, /.stories.js$/);
diff --git a/commitlint.config.js b/commitlint.config.js
new file mode 100644
index 0000000..0aa97fe
--- /dev/null
+++ b/commitlint.config.js
@@ -0,0 +1,8 @@
+/* eslint-env node */
+
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+
+  // Add your own rules. See http://marionebl.github.io/commitlint
+  rules: {},
+};
diff --git a/package-lock.json b/package-lock.json
index 801dfd3..1c9fac1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -829,23 +829,165 @@
       }
     },
     "@commitlint/cli": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/@commitlint/cli/-/cli-6.2.0.tgz",
-      "integrity": "sha1-svgZDrCMzXjuplEUuGTzxl7KRmo=",
+      "version": "7.2.1",
+      "resolved": "https://registry.npmjs.org/@commitlint/cli/-/cli-7.2.1.tgz",
+      "integrity": "sha512-PUHWGoQOx8m6ZSpZPSHb+YISFAvW7jiWvCJOQiViKHZC8CLKu4bjyc/AwP8gBte0RsTGAu1ekiitp5Q0NcLGcA==",
       "dev": true,
       "requires": {
-        "@commitlint/format": "6.1.3",
-        "@commitlint/lint": "6.2.0",
-        "@commitlint/load": "6.1.3",
-        "@commitlint/read": "6.1.3",
+        "@commitlint/format": "7.2.1",
+        "@commitlint/lint": "7.2.1",
+        "@commitlint/load": "7.2.1",
+        "@commitlint/read": "7.1.2",
         "babel-polyfill": "6.26.0",
         "chalk": "2.3.1",
         "get-stdin": "5.0.1",
         "lodash.merge": "4.6.1",
         "lodash.pick": "4.4.0",
-        "meow": "4.0.0"
+        "meow": "5.0.0",
+        "resolve-from": "4.0.0",
+        "resolve-global": "0.1.0"
       },
       "dependencies": {
+        "@commitlint/ensure": {
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/@commitlint/ensure/-/ensure-7.2.0.tgz",
+          "integrity": "sha512-j2AJE4eDeLP6O/Z1CdPwEXAzcrRRoeeHLuvW8bldQ4J2nHiX9hzmSe87H87Ob8Avm+zIegsqVPGaBAtRmbODYw==",
+          "dev": true,
+          "requires": {
+            "lodash.camelcase": "4.3.0",
+            "lodash.kebabcase": "4.1.1",
+            "lodash.snakecase": "4.1.1",
+            "lodash.startcase": "4.4.0",
+            "lodash.upperfirst": "4.3.1"
+          }
+        },
+        "@commitlint/execute-rule": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/@commitlint/execute-rule/-/execute-rule-7.1.2.tgz",
+          "integrity": "sha512-EP/SqX2U2L4AQHglZ2vGM1pvHJOh3sbYtHn1QhtllqEpsdmhuNpVPSGHP/r9OD2h4i90vtnWgZQoskt2MkbknA==",
+          "dev": true,
+          "requires": {
+            "babel-runtime": "6.26.0"
+          }
+        },
+        "@commitlint/format": {
+          "version": "7.2.1",
+          "resolved": "https://registry.npmjs.org/@commitlint/format/-/format-7.2.1.tgz",
+          "integrity": "sha512-1YcL+ZWB8V52oDFQBhSBJjiJOZDt4Vl06O5TkG70BMpre3EQru5KYIN16eEPqfihNw0bj8gSIWcf87Gvh3OrOw==",
+          "dev": true,
+          "requires": {
+            "babel-runtime": "6.26.0",
+            "chalk": "2.3.1"
+          }
+        },
+        "@commitlint/is-ignored": {
+          "version": "7.2.1",
+          "resolved": "https://registry.npmjs.org/@commitlint/is-ignored/-/is-ignored-7.2.1.tgz",
+          "integrity": "sha512-3DsEEKRnj8Bv9qImsxWcGf9BwerDnk5Vs+oK6ELzIwkndHaAZLHyATjmaz/rsc+U+DWiVjgKrrw3xvd/UsoazA==",
+          "dev": true,
+          "requires": {
+            "semver": "5.6.0"
+          }
+        },
+        "@commitlint/lint": {
+          "version": "7.2.1",
+          "resolved": "https://registry.npmjs.org/@commitlint/lint/-/lint-7.2.1.tgz",
+          "integrity": "sha512-rM7nUyNUJyuKw1MTwJG/wk4twB5YCAG2wzJMn5NqVpGD/qmLOzlZoBl0+CYmuOsbIRAA2rlEV6KZHBk9tTfAdQ==",
+          "dev": true,
+          "requires": {
+            "@commitlint/is-ignored": "7.2.1",
+            "@commitlint/parse": "7.1.2",
+            "@commitlint/rules": "7.2.0",
+            "babel-runtime": "6.26.0",
+            "lodash.topairs": "4.3.0"
+          }
+        },
+        "@commitlint/load": {
+          "version": "7.2.1",
+          "resolved": "https://registry.npmjs.org/@commitlint/load/-/load-7.2.1.tgz",
+          "integrity": "sha512-FnfmfhPGJqGwILVRznduBejOicNey6p/byfcyxtcBkN2+X96gDuNtqcnGcngCrzPIAgaIrQQcTQDA1/KMtW21A==",
+          "dev": true,
+          "requires": {
+            "@commitlint/execute-rule": "7.1.2",
+            "@commitlint/resolve-extends": "7.1.2",
+            "babel-runtime": "6.26.0",
+            "cosmiconfig": "4.0.0",
+            "lodash.merge": "4.6.1",
+            "lodash.mergewith": "4.6.1",
+            "lodash.pick": "4.4.0",
+            "lodash.topairs": "4.3.0",
+            "resolve-from": "4.0.0"
+          }
+        },
+        "@commitlint/message": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/@commitlint/message/-/message-7.1.2.tgz",
+          "integrity": "sha512-6FQeK5LAs1Bde6W/jULg+I/XZhj3gbqCWlS2Q11A2JbaTRpRJZzm7WdD9nK3I0+De41EOqW2t4mBnrpio3o1Zg==",
+          "dev": true
+        },
+        "@commitlint/parse": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/@commitlint/parse/-/parse-7.1.2.tgz",
+          "integrity": "sha512-wrdLwJZL3cs89MfgPtnbbKByijUo3Wrug55aTke5k/F0XNxGaDaNJyH4QXgidgXk57r2t4NJVAKwjnY4wjfNwg==",
+          "dev": true,
+          "requires": {
+            "conventional-changelog-angular": "1.6.6",
+            "conventional-commits-parser": "2.1.7"
+          }
+        },
+        "@commitlint/read": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/@commitlint/read/-/read-7.1.2.tgz",
+          "integrity": "sha512-sarYQgfTay2Eu7onHz53EYyRw7pI5QmLE7tP5Ri9op6eu4LadjSoA/4dfc+VE7avsq21J2ewSbz+9f0uvhDxgg==",
+          "dev": true,
+          "requires": {
+            "@commitlint/top-level": "7.1.2",
+            "@marionebl/sander": "0.6.1",
+            "babel-runtime": "6.26.0",
+            "git-raw-commits": "1.3.6"
+          }
+        },
+        "@commitlint/resolve-extends": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/@commitlint/resolve-extends/-/resolve-extends-7.1.2.tgz",
+          "integrity": "sha512-zwbifMB9DeHP4sYQdrkx+XJh5Q1lyP/OdlErUCC34NV4Lkxw/XxXF4St3e+y1X28/SgrEc2XSOS6n/vQQfUlLA==",
+          "dev": true,
+          "requires": {
+            "babel-runtime": "6.26.0",
+            "lodash.merge": "4.6.1",
+            "lodash.omit": "4.5.0",
+            "require-uncached": "1.0.3",
+            "resolve-from": "4.0.0",
+            "resolve-global": "0.1.0"
+          }
+        },
+        "@commitlint/rules": {
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/@commitlint/rules/-/rules-7.2.0.tgz",
+          "integrity": "sha512-c15Q9H5iYE9fnncLnFnMuvPLYA/i0pve5moV0uxJJGr4GgJoBKyldd4CCDhoE80C1k8ABuqr2o2qsopzVEp3Ww==",
+          "dev": true,
+          "requires": {
+            "@commitlint/ensure": "7.2.0",
+            "@commitlint/message": "7.1.2",
+            "@commitlint/to-lines": "7.1.2",
+            "babel-runtime": "6.26.0"
+          }
+        },
+        "@commitlint/to-lines": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/@commitlint/to-lines/-/to-lines-7.1.2.tgz",
+          "integrity": "sha512-Nz3qZwrIEYiN9v/ThJqXAwu4X5+hvT9H8yRPHfjc538R8WhwEfhvym7/4YznDHSvWrQgwqtNPdrb6b2OSBsHmg==",
+          "dev": true
+        },
+        "@commitlint/top-level": {
+          "version": "7.1.2",
+          "resolved": "https://registry.npmjs.org/@commitlint/top-level/-/top-level-7.1.2.tgz",
+          "integrity": "sha512-YKugOAKy3hgM/ITezPp7Ns51U3xoJfuOsVnMGW4oDcHLhuQ/Qd58ROv/Hgedtk8HugKX3DdZ8XoEnRG70RDGqQ==",
+          "dev": true,
+          "requires": {
+            "find-up": "2.1.0"
+          }
+        },
         "camelcase": {
           "version": "4.1.0",
           "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
@@ -874,6 +1016,62 @@
             "supports-color": "5.5.0"
           }
         },
+        "conventional-changelog-angular": {
+          "version": "1.6.6",
+          "resolved": "http://registry.npmjs.org/conventional-changelog-angular/-/conventional-changelog-angular-1.6.6.tgz",
+          "integrity": "sha512-suQnFSqCxRwyBxY68pYTsFkG0taIdinHLNEAX5ivtw8bCRnIgnpvcHmlR/yjUyZIrNPYAoXlY1WiEKWgSE4BNg==",
+          "dev": true,
+          "requires": {
+            "compare-func": "1.3.2",
+            "q": "1.5.1"
+          }
+        },
+        "conventional-commits-parser": {
+          "version": "2.1.7",
+          "resolved": "http://registry.npmjs.org/conventional-commits-parser/-/conventional-commits-parser-2.1.7.tgz",
+          "integrity": "sha512-BoMaddIEJ6B4QVMSDu9IkVImlGOSGA1I2BQyOZHeLQ6qVOJLcLKn97+fL6dGbzWEiqDzfH4OkcveULmeq2MHFQ==",
+          "dev": true,
+          "requires": {
+            "JSONStream": "1.3.5",
+            "is-text-path": "1.0.1",
+            "lodash": "4.17.11",
+            "meow": "4.0.1",
+            "split2": "2.2.0",
+            "through2": "2.0.5",
+            "trim-off-newlines": "1.0.1"
+          },
+          "dependencies": {
+            "meow": {
+              "version": "4.0.1",
+              "resolved": "https://registry.npmjs.org/meow/-/meow-4.0.1.tgz",
+              "integrity": "sha512-xcSBHD5Z86zaOc+781KrupuHAzeGXSLtiAOmBsiLDiPSaYSB6hdew2ng9EBAnZ62jagG9MHAOdxpDi/lWBFJ/A==",
+              "dev": true,
+              "requires": {
+                "camelcase-keys": "4.2.0",
+                "decamelize-keys": "1.1.0",
+                "loud-rejection": "1.6.0",
+                "minimist": "1.2.0",
+                "minimist-options": "3.0.2",
+                "normalize-package-data": "2.4.0",
+                "read-pkg-up": "3.0.0",
+                "redent": "2.0.0",
+                "trim-newlines": "2.0.0"
+              }
+            }
+          }
+        },
+        "cosmiconfig": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/cosmiconfig/-/cosmiconfig-4.0.0.tgz",
+          "integrity": "sha512-6e5vDdrXZD+t5v0L8CrurPeybg4Fmf+FCSYxXKYVAqLUtyCSbuyqE059d0kDthTNRzKVjL7QMgNpEUlsoYH3iQ==",
+          "dev": true,
+          "requires": {
+            "is-directory": "0.3.1",
+            "js-yaml": "3.12.0",
+            "parse-json": "4.0.0",
+            "require-from-string": "2.0.2"
+          }
+        },
         "find-up": {
           "version": "2.1.0",
           "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
@@ -918,20 +1116,20 @@
           "dev": true
         },
         "meow": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/meow/-/meow-4.0.0.tgz",
-          "integrity": "sha512-Me/kel335m6vMKmEmA6c87Z6DUFW3JqkINRnxkbC+A/PUm0D5Fl2dEBQrPKnqCL9Te/CIa1MUt/0InMJhuC/sw==",
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/meow/-/meow-5.0.0.tgz",
+          "integrity": "sha512-CbTqYU17ABaLefO8vCU153ZZlprKYWDljcndKKDCFcYQITzWCXZAVk4QMFZPgvzrnUQ3uItnIE/LoUOwrT15Ig==",
           "dev": true,
           "requires": {
             "camelcase-keys": "4.2.0",
             "decamelize-keys": "1.1.0",
             "loud-rejection": "1.6.0",
-            "minimist": "1.2.0",
             "minimist-options": "3.0.2",
             "normalize-package-data": "2.4.0",
             "read-pkg-up": "3.0.0",
             "redent": "2.0.0",
-            "trim-newlines": "2.0.0"
+            "trim-newlines": "2.0.0",
+            "yargs-parser": "10.1.0"
           }
         },
         "p-limit": {
@@ -998,6 +1196,18 @@
             "strip-indent": "2.0.0"
           }
         },
+        "resolve-from": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
+          "integrity": "sha512-pb/MYmXstAkysRFx8piNI1tGFNQIFA3vkE3Gq4EuA1dF6gHp/+vgZqsCGJapvy8N3Q+4o7FwvquPJcnZ7RYy4g==",
+          "dev": true
+        },
+        "semver": {
+          "version": "5.6.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
+          "integrity": "sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg==",
+          "dev": true
+        },
         "strip-bom": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
@@ -1015,13 +1225,22 @@
           "resolved": "https://registry.npmjs.org/trim-newlines/-/trim-newlines-2.0.0.tgz",
           "integrity": "sha1-tAPQuRvlDDMd/EuC7s6yLD3hbSA=",
           "dev": true
+        },
+        "yargs-parser": {
+          "version": "10.1.0",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-10.1.0.tgz",
+          "integrity": "sha512-VCIyR1wJoEBZUqk5PA+oOBF6ypbwh5aNB3I50guxAL/quggdfs4TtNHQrSazFA3fYZ+tEqfs0zIGlv0c/rgjbQ==",
+          "dev": true,
+          "requires": {
+            "camelcase": "4.1.0"
+          }
         }
       }
     },
     "@commitlint/config-conventional": {
-      "version": "6.1.3",
-      "resolved": "http://registry.npmjs.org/@commitlint/config-conventional/-/config-conventional-6.1.3.tgz",
-      "integrity": "sha1-bAburgTFrHicNhjfTVKu2on/uBA=",
+      "version": "7.1.2",
+      "resolved": "https://registry.npmjs.org/@commitlint/config-conventional/-/config-conventional-7.1.2.tgz",
+      "integrity": "sha512-DmA4ixkpv03qA1TVs1Bl25QsVym2bPL6pKapesALWIVggG3OpwqGZ55vN75Tx8xZoG7LFKrVyrt7kwhA7X8njQ==",
       "dev": true
     },
     "@commitlint/core": {
@@ -3835,6 +4054,12 @@
         }
       }
     },
+    "cachedir": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/cachedir/-/cachedir-2.1.0.tgz",
+      "integrity": "sha512-xGBpPqoBvn3unBW7oxgb8aJn42K0m9m1/wyjmazah10Fq7bROGG3kRAE6OIyr3U3PIJUqGuebhCEdMk9OKJG0A==",
+      "dev": true
+    },
     "call-me-maybe": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/call-me-maybe/-/call-me-maybe-1.0.1.tgz",
@@ -4271,6 +4496,129 @@
       "integrity": "sha512-6CYPa+JP2ftfRU2qkDK+UTVeQYosOg/2GbcjIcKPHfinyOLPVGXu/ovN86RP49Re5ndJK1N0kuiidFFuepc4ZQ==",
       "dev": true
     },
+    "commitizen": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/commitizen/-/commitizen-3.0.5.tgz",
+      "integrity": "sha512-WB9sz7qudArOsW1ninU8YGLNoXLQ5lJBZf538iQ7i96SXAkqVMZdmPtSyN4WFPM5PjQR7rWxDa+hzfGIJfrXUg==",
+      "dev": true,
+      "requires": {
+        "cachedir": "2.1.0",
+        "cz-conventional-changelog": "2.1.0",
+        "dedent": "0.7.0",
+        "detect-indent": "5.0.0",
+        "find-node-modules": "1.0.4",
+        "find-root": "1.1.0",
+        "fs-extra": "7.0.0",
+        "glob": "7.1.3",
+        "inquirer": "6.2.0",
+        "lodash": "4.17.11",
+        "minimist": "1.2.0",
+        "shelljs": "0.7.6",
+        "strip-json-comments": "2.0.1"
+      },
+      "dependencies": {
+        "ansi-escapes": {
+          "version": "3.1.0",
+          "resolved": "http://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.1.0.tgz",
+          "integrity": "sha512-UgAb8H9D41AQnu/PbWlCofQVcnV4Gs2bBJi9eZPxfU/hgglFh3SMDMENRIqdr7H6XFnXdoknctFByVsCOotTVw==",
+          "dev": true
+        },
+        "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"
+          }
+        },
+        "figures": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/figures/-/figures-2.0.0.tgz",
+          "integrity": "sha1-OrGi0qYsi/tDGgyUy3l6L84nyWI=",
+          "dev": true,
+          "requires": {
+            "escape-string-regexp": "1.0.5"
+          }
+        },
+        "inquirer": {
+          "version": "6.2.0",
+          "resolved": "https://registry.npmjs.org/inquirer/-/inquirer-6.2.0.tgz",
+          "integrity": "sha512-QIEQG4YyQ2UYZGDC4srMZ7BjHOmNk1lR2JQj5UknBapklm6WHA+VVH7N+sUdX3A7NeCfGF8o4X1S3Ao7nAcIeg==",
+          "dev": true,
+          "requires": {
+            "ansi-escapes": "3.1.0",
+            "chalk": "2.4.1",
+            "cli-cursor": "2.1.0",
+            "cli-width": "2.2.0",
+            "external-editor": "3.0.3",
+            "figures": "2.0.0",
+            "lodash": "4.17.11",
+            "mute-stream": "0.0.7",
+            "run-async": "2.3.0",
+            "rxjs": "6.3.2",
+            "string-width": "2.1.1",
+            "strip-ansi": "4.0.0",
+            "through": "2.3.8"
+          }
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "onetime": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/onetime/-/onetime-2.0.1.tgz",
+          "integrity": "sha1-BnQoIw/WdEOyeUsiu6UotoZ5YtQ=",
+          "dev": true,
+          "requires": {
+            "mimic-fn": "1.2.0"
+          }
+        },
+        "restore-cursor": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/restore-cursor/-/restore-cursor-2.0.0.tgz",
+          "integrity": "sha1-n37ih/gv0ybU/RYpI9YhKe7g368=",
+          "dev": true,
+          "requires": {
+            "onetime": "2.0.1",
+            "signal-exit": "3.0.2"
+          }
+        },
+        "shelljs": {
+          "version": "0.7.6",
+          "resolved": "http://registry.npmjs.org/shelljs/-/shelljs-0.7.6.tgz",
+          "integrity": "sha1-N5zM+1a5HIYB5HkzVutTgpJN6a0=",
+          "dev": true,
+          "requires": {
+            "glob": "7.1.3",
+            "interpret": "1.1.0",
+            "rechoir": "0.6.2"
+          }
+        },
+        "string-width": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+          "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+          "dev": true,
+          "requires": {
+            "is-fullwidth-code-point": "2.0.0",
+            "strip-ansi": "4.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "3.0.0"
+          }
+        }
+      }
+    },
     "common-tags": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/common-tags/-/common-tags-1.8.0.tgz",
@@ -5297,6 +5645,21 @@
       "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA=",
       "dev": true
     },
+    "detect-file": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/detect-file/-/detect-file-0.1.0.tgz",
+      "integrity": "sha1-STXe39lIhkjgBrASlWbpOGcR6mM=",
+      "dev": true,
+      "requires": {
+        "fs-exists-sync": "0.1.0"
+      }
+    },
+    "detect-indent": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/detect-indent/-/detect-indent-5.0.0.tgz",
+      "integrity": "sha1-OHHMCmoALow+Wzz38zYmRnXwa50=",
+      "dev": true
+    },
     "detect-port": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/detect-port/-/detect-port-1.3.0.tgz",
@@ -6785,12 +7148,28 @@
         "pkg-dir": "3.0.0"
       }
     },
+    "find-node-modules": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/find-node-modules/-/find-node-modules-1.0.4.tgz",
+      "integrity": "sha1-tt6zzMtpnIcDdne87eLF9YYrJVA=",
+      "dev": true,
+      "requires": {
+        "findup-sync": "0.4.2",
+        "merge": "1.2.1"
+      }
+    },
     "find-parent-dir": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/find-parent-dir/-/find-parent-dir-0.3.0.tgz",
       "integrity": "sha1-M8RLQpqysvBkYpnF+fcY83b/jVQ=",
       "dev": true
     },
+    "find-root": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/find-root/-/find-root-1.1.0.tgz",
+      "integrity": "sha512-NKfW6bec6GfKc0SGx1e07QZY9PE99u0Bft/0rzSD5k3sO/vwkVUpDUKVm5Gpp5Ue3YfShPFTX2070tDs5kB9Ng==",
+      "dev": true
+    },
     "find-up": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
@@ -6818,6 +7197,156 @@
         }
       }
     },
+    "findup-sync": {
+      "version": "0.4.2",
+      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-0.4.2.tgz",
+      "integrity": "sha1-qBF9D3MST1pFRoOVef5S1xKfteU=",
+      "dev": true,
+      "requires": {
+        "detect-file": "0.1.0",
+        "is-glob": "2.0.1",
+        "micromatch": "2.3.11",
+        "resolve-dir": "0.1.1"
+      },
+      "dependencies": {
+        "arr-diff": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-2.0.0.tgz",
+          "integrity": "sha1-jzuCf5Vai9ZpaX5KQlasPOrjVs8=",
+          "dev": true,
+          "requires": {
+            "arr-flatten": "1.1.0"
+          }
+        },
+        "array-unique": {
+          "version": "0.2.1",
+          "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.2.1.tgz",
+          "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=",
+          "dev": true
+        },
+        "braces": {
+          "version": "1.8.5",
+          "resolved": "https://registry.npmjs.org/braces/-/braces-1.8.5.tgz",
+          "integrity": "sha1-uneWLhLf+WnWt2cR6RS3N4V79qc=",
+          "dev": true,
+          "requires": {
+            "expand-range": "1.8.2",
+            "preserve": "0.2.0",
+            "repeat-element": "1.1.3"
+          }
+        },
+        "expand-brackets": {
+          "version": "0.1.5",
+          "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-0.1.5.tgz",
+          "integrity": "sha1-3wcoTjQqgHzXM6xa9yQR5YHRF3s=",
+          "dev": true,
+          "requires": {
+            "is-posix-bracket": "0.1.1"
+          }
+        },
+        "expand-tilde": {
+          "version": "1.2.2",
+          "resolved": "https://registry.npmjs.org/expand-tilde/-/expand-tilde-1.2.2.tgz",
+          "integrity": "sha1-C4HrqJflo9MdHD0QL48BRB5VlEk=",
+          "dev": true,
+          "requires": {
+            "os-homedir": "1.0.2"
+          }
+        },
+        "extglob": {
+          "version": "0.3.2",
+          "resolved": "https://registry.npmjs.org/extglob/-/extglob-0.3.2.tgz",
+          "integrity": "sha1-Lhj/PS9JqydlzskCPwEdqo2DSaE=",
+          "dev": true,
+          "requires": {
+            "is-extglob": "1.0.0"
+          }
+        },
+        "global-modules": {
+          "version": "0.2.3",
+          "resolved": "https://registry.npmjs.org/global-modules/-/global-modules-0.2.3.tgz",
+          "integrity": "sha1-6lo77ULG1s6ZWk+KEmm12uIjgo0=",
+          "dev": true,
+          "requires": {
+            "global-prefix": "0.1.5",
+            "is-windows": "0.2.0"
+          }
+        },
+        "global-prefix": {
+          "version": "0.1.5",
+          "resolved": "https://registry.npmjs.org/global-prefix/-/global-prefix-0.1.5.tgz",
+          "integrity": "sha1-jTvGuNo8qBEqFg2NSW/wRiv+948=",
+          "dev": true,
+          "requires": {
+            "homedir-polyfill": "1.0.1",
+            "ini": "1.3.5",
+            "is-windows": "0.2.0",
+            "which": "1.3.1"
+          }
+        },
+        "is-extglob": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-1.0.0.tgz",
+          "integrity": "sha1-rEaBd8SUNAWgkvyPKXYMb/xiBsA=",
+          "dev": true
+        },
+        "is-glob": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-2.0.1.tgz",
+          "integrity": "sha1-0Jb5JqPe1WAPP9/ZEZjLCIjC2GM=",
+          "dev": true,
+          "requires": {
+            "is-extglob": "1.0.0"
+          }
+        },
+        "is-windows": {
+          "version": "0.2.0",
+          "resolved": "https://registry.npmjs.org/is-windows/-/is-windows-0.2.0.tgz",
+          "integrity": "sha1-3hqm1j6indJIc3tp8f+LgALSEIw=",
+          "dev": true
+        },
+        "kind-of": {
+          "version": "3.2.2",
+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
+          "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+          "dev": true,
+          "requires": {
+            "is-buffer": "1.1.6"
+          }
+        },
+        "micromatch": {
+          "version": "2.3.11",
+          "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-2.3.11.tgz",
+          "integrity": "sha1-hmd8l9FyCzY0MdBNDRUpO9OMFWU=",
+          "dev": true,
+          "requires": {
+            "arr-diff": "2.0.0",
+            "array-unique": "0.2.1",
+            "braces": "1.8.5",
+            "expand-brackets": "0.1.5",
+            "extglob": "0.3.2",
+            "filename-regex": "2.0.1",
+            "is-extglob": "1.0.0",
+            "is-glob": "2.0.1",
+            "kind-of": "3.2.2",
+            "normalize-path": "2.1.1",
+            "object.omit": "2.0.1",
+            "parse-glob": "3.0.4",
+            "regex-cache": "0.4.4"
+          }
+        },
+        "resolve-dir": {
+          "version": "0.1.1",
+          "resolved": "https://registry.npmjs.org/resolve-dir/-/resolve-dir-0.1.1.tgz",
+          "integrity": "sha1-shklmlYC+sXFxJatiUpujMQwJh4=",
+          "dev": true,
+          "requires": {
+            "expand-tilde": "1.2.2",
+            "global-modules": "0.2.3"
+          }
+        }
+      }
+    },
     "flat-cache": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/flat-cache/-/flat-cache-1.3.0.tgz",
@@ -6914,6 +7443,12 @@
         "readable-stream": "2.3.6"
       }
     },
+    "fs-exists-sync": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/fs-exists-sync/-/fs-exists-sync-0.1.0.tgz",
+      "integrity": "sha1-mC1ok6+RjnLQjeyehnP/K1qNat0=",
+      "dev": true
+    },
     "fs-extra": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.0.tgz",
@@ -10099,6 +10634,12 @@
         "trim-newlines": "1.0.0"
       }
     },
+    "merge": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/merge/-/merge-1.2.1.tgz",
+      "integrity": "sha512-VjFo4P5Whtj4vsLzsYBu5ayHhoHJ0UqNm7ibvShmbmoz7tGi0vXaoJbGdB+GmDMLUdg8DpQXEIeVDAe8MaABvQ==",
+      "dev": true
+    },
     "merge-descriptors": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.1.tgz",
@@ -16904,6 +17445,61 @@
         "semantic-release": "12.4.1"
       },
       "dependencies": {
+        "@commitlint/cli": {
+          "version": "6.2.0",
+          "resolved": "https://registry.npmjs.org/@commitlint/cli/-/cli-6.2.0.tgz",
+          "integrity": "sha1-svgZDrCMzXjuplEUuGTzxl7KRmo=",
+          "dev": true,
+          "requires": {
+            "@commitlint/format": "6.1.3",
+            "@commitlint/lint": "6.2.0",
+            "@commitlint/load": "6.1.3",
+            "@commitlint/read": "6.1.3",
+            "babel-polyfill": "6.26.0",
+            "chalk": "2.3.1",
+            "get-stdin": "5.0.1",
+            "lodash.merge": "4.6.1",
+            "lodash.pick": "4.4.0",
+            "meow": "4.0.0"
+          },
+          "dependencies": {
+            "ansi-styles": {
+              "version": "3.2.1",
+              "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+              "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+              "dev": true,
+              "requires": {
+                "color-convert": "1.9.3"
+              }
+            },
+            "chalk": {
+              "version": "2.3.1",
+              "resolved": "http://registry.npmjs.org/chalk/-/chalk-2.3.1.tgz",
+              "integrity": "sha512-QUU4ofkDoMIVO7hcx1iPTISs88wsO8jA92RQIm4JAwZvFGGAV2hSAA1NX7oVj2Ej2Q6NDTcRDjPTFrMCRZoJ6g==",
+              "dev": true,
+              "requires": {
+                "ansi-styles": "3.2.1",
+                "escape-string-regexp": "1.0.5",
+                "supports-color": "5.5.0"
+              }
+            },
+            "supports-color": {
+              "version": "5.5.0",
+              "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+              "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+              "dev": true,
+              "requires": {
+                "has-flag": "3.0.0"
+              }
+            }
+          }
+        },
+        "@commitlint/config-conventional": {
+          "version": "6.1.3",
+          "resolved": "http://registry.npmjs.org/@commitlint/config-conventional/-/config-conventional-6.1.3.tgz",
+          "integrity": "sha1-bAburgTFrHicNhjfTVKu2on/uBA=",
+          "dev": true
+        },
         "@octokit/rest": {
           "version": "15.18.0",
           "resolved": "https://registry.npmjs.org/@octokit/rest/-/rest-15.18.0.tgz",
@@ -17021,6 +17617,23 @@
           "integrity": "sha1-vgiVmQl7dKXJxKhKDNvNtivYeu8=",
           "dev": true
         },
+        "camelcase": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
+          "dev": true
+        },
+        "camelcase-keys": {
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-4.2.0.tgz",
+          "integrity": "sha1-oqpfsa9oh1glnDLBQUJteJI7m3c=",
+          "dev": true,
+          "requires": {
+            "camelcase": "4.1.0",
+            "map-obj": "2.0.0",
+            "quick-lru": "1.1.0"
+          }
+        },
         "cardinal": {
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/cardinal/-/cardinal-1.0.0.tgz",
@@ -17098,6 +17711,12 @@
             "locate-path": "2.0.0"
           }
         },
+        "get-stdin": {
+          "version": "5.0.1",
+          "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-5.0.1.tgz",
+          "integrity": "sha1-Ei4WFZHiH/TFJTAwVpPyDmOTo5g=",
+          "dev": true
+        },
         "git-url-parse": {
           "version": "10.1.0",
           "resolved": "https://registry.npmjs.org/git-url-parse/-/git-url-parse-10.1.0.tgz",
@@ -17157,6 +17776,12 @@
             "path-exists": "3.0.0"
           }
         },
+        "map-obj": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/map-obj/-/map-obj-2.0.0.tgz",
+          "integrity": "sha1-plzSkIepJZi4eRJXpSPgISIqwfk=",
+          "dev": true
+        },
         "marked": {
           "version": "0.3.19",
           "resolved": "http://registry.npmjs.org/marked/-/marked-0.3.19.tgz",
@@ -17191,6 +17816,23 @@
             }
           }
         },
+        "meow": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/meow/-/meow-4.0.0.tgz",
+          "integrity": "sha512-Me/kel335m6vMKmEmA6c87Z6DUFW3JqkINRnxkbC+A/PUm0D5Fl2dEBQrPKnqCL9Te/CIa1MUt/0InMJhuC/sw==",
+          "dev": true,
+          "requires": {
+            "camelcase-keys": "4.2.0",
+            "decamelize-keys": "1.1.0",
+            "loud-rejection": "1.6.0",
+            "minimist": "1.2.0",
+            "minimist-options": "3.0.2",
+            "normalize-package-data": "2.4.0",
+            "read-pkg-up": "3.0.0",
+            "redent": "2.0.0",
+            "trim-newlines": "2.0.0"
+          }
+        },
         "mime": {
           "version": "2.4.0",
           "resolved": "https://registry.npmjs.org/mime/-/mime-2.4.0.tgz",
@@ -17279,6 +17921,16 @@
             "read-pkg": "3.0.0"
           }
         },
+        "redent": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/redent/-/redent-2.0.0.tgz",
+          "integrity": "sha1-wbIAe0LVfrE4kHmzyDM2OdXhzKo=",
+          "dev": true,
+          "requires": {
+            "indent-string": "3.2.0",
+            "strip-indent": "2.0.0"
+          }
+        },
         "redeyed": {
           "version": "1.0.1",
           "resolved": "https://registry.npmjs.org/redeyed/-/redeyed-1.0.1.tgz",
@@ -17411,11 +18063,23 @@
           "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
           "dev": true
         },
+        "strip-indent": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/strip-indent/-/strip-indent-2.0.0.tgz",
+          "integrity": "sha1-XvjbKV0B5u1sv3qrlpmNeCJSe2g=",
+          "dev": true
+        },
         "supports-color": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
           "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
           "dev": true
+        },
+        "trim-newlines": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/trim-newlines/-/trim-newlines-2.0.0.tgz",
+          "integrity": "sha1-tAPQuRvlDDMd/EuC7s6yLD3hbSA=",
+          "dev": true
         }
       }
     },
diff --git a/package.json b/package.json
index cea9fbe..0d93950 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "NES.css is NES-style CSS Framework.",
   "scripts": {
     "watch": "npm run build:sass -- --watch",
-    "build": "npm run build:clean && npm run build:stylelint && npm run build:sass && npm run build:autoprefix && npm run build:cleancss && npm run build-storybook",
+    "build": "npm run build:clean && npm run build:stylelint && npm run build:sass && npm run build:autoprefix && npm run build:cleancss && npm run build:storybook",
     "stylelint": "stylelint scss/**/*.scss",
     "build:stylelint": "npm run stylelint -- --fix",
     "build:clean": "rimraf css",
@@ -37,11 +37,14 @@
   },
   "homepage": "https://github.com/BcRikko/NES.css#readme",
   "devDependencies": {
+    "@commitlint/cli": "^7.2.1",
+    "@commitlint/config-conventional": "^7.1.2",
     "@storybook/addon-knobs": "^4.0.11",
     "@storybook/html": "^4.0.11",
     "autoprefixer": "^9.1.5",
     "babel-loader": "^8.0.4",
     "clean-css-cli": "^4.2.1",
+    "commitizen": "^3.0.5",
     "eslint": "^5.9.0",
     "eslint-config-airbnb-base": "^13.1.0",
     "eslint-plugin-import": "^2.14.0",
@@ -64,6 +67,11 @@
   "browserslist": [
     "> 1%"
   ],
+  "commitlint": {
+    "extends": [
+      "@commitlint/config-conventional"
+    ]
+  },
   "husky": {
     "hooks": {
       "commit-msg": "commitlint -E HUSKY_GIT_PARAMS",
@@ -78,7 +86,7 @@
       "git add"
     ],
     "*.js": [
-      "eslint .",
+      "eslint '.storybook/**/*.js' 'docs/**/*.js'",
       "git add"
     ]
   },