diff --git a/.eslintrc.json b/.eslintrc.json
index 5f800df..5050590 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -9,6 +9,7 @@
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     "no-cond-assign": ["error", "except-parens"],
     "no-param-reassign": ["error", { "props": false }],
-    "no-continue": "off"
+    "no-continue": "off",
+    "no-new-func": "off"
   }
 }
diff --git a/package-lock.json b/package-lock.json
index eba09ce..c6097e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -123,6 +123,12 @@
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     },
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       "dev": true
     },
+    "caller-callsite": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/caller-callsite/-/caller-callsite-2.0.0.tgz",
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+          "resolved": "https://registry.npmjs.org/callsites/-/callsites-2.0.0.tgz",
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+      "integrity": "sha1-Ro+DBE42mrIBD6xfBs7uFbsssfQ=",
+      "dev": true,
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       "dev": true
     },
+    "ci-info": {
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+      "resolved": "https://registry.npmjs.org/ci-info/-/ci-info-2.0.0.tgz",
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+    },
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@@ -306,6 +344,46 @@
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+      "resolved": "https://registry.npmjs.org/cosmiconfig/-/cosmiconfig-5.2.1.tgz",
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+          "integrity": "sha1-2BNVwVYS04bGH53dOSLUMEgipUY=",
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+          "dev": true,
+          "requires": {
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+      "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
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+      "resolved": "https://registry.npmjs.org/execa/-/execa-1.0.0.tgz",
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+      "dev": true,
+      "requires": {
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+        "get-stream": "^4.0.0",
+        "is-stream": "^1.1.0",
+        "npm-run-path": "^2.0.0",
+        "p-finally": "^1.0.0",
+        "signal-exit": "^3.0.0",
+        "strip-eof": "^1.0.0"
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@@ -731,6 +833,21 @@
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+      "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-7.0.0.tgz",
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+      "dev": true
+    },
+    "get-stream": {
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+      "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-4.1.0.tgz",
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+      "dev": true,
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+        "execa": "^1.0.0",
+        "find-up": "^3.0.0",
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+        "run-node": "^1.0.0",
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+          "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-5.1.1.tgz",
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+          "dev": true,
+          "requires": {
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+            "normalize-package-data": "^2.5.0",
+            "parse-json": "^4.0.0",
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     "iconv-lite": {
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       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
@@ -881,12 +1128,27 @@
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       "dev": true
     },
+    "is-ci": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/is-ci/-/is-ci-2.0.0.tgz",
+      "integrity": "sha512-YfJT7rkpQB0updsdHLGWrvhBJfcfzNNawYDNIyQXJz0IViGf75O8EBPKSdvw2rF+LGCsX4FZ8tcr3b19LcZq4w==",
+      "dev": true,
+      "requires": {
+        "ci-info": "^2.0.0"
+      }
+    },
     "is-date-object": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/is-date-object/-/is-date-object-1.0.1.tgz",
       "integrity": "sha1-mqIOtq7rv/d/vTPnTKAbM1gdOhY=",
       "dev": true
     },
+    "is-directory": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/is-directory/-/is-directory-0.3.1.tgz",
+      "integrity": "sha1-YTObbyR1/Hcv2cnYP1yFddwVSuE=",
+      "dev": true
+    },
     "is-fullwidth-code-point": {
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       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
@@ -908,6 +1170,12 @@
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       }
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+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
+      "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ=",
+      "dev": true
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+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/json-parse-better-errors/-/json-parse-better-errors-1.0.2.tgz",
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@@ -1097,6 +1371,15 @@
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+      "dev": true,
+      "requires": {
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@@ -1165,6 +1448,12 @@
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@@ -1261,6 +1550,15 @@
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+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/please-upgrade-node/-/please-upgrade-node-3.1.1.tgz",
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+      "dev": true,
+      "requires": {
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     },
+    "pump": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
+      "integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==",
+      "dev": true,
+      "requires": {
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+        "once": "^1.3.1"
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@@ -1393,6 +1701,12 @@
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+    "run-node": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/run-node/-/run-node-1.0.0.tgz",
+      "integrity": "sha512-kc120TBlQ3mih1LSzdAJXo4xn/GWS2ec0l3S+syHDXP9uRr0JAT8Qd3mdMuyjqCzeZktgP3try92cEgf9Nks8A==",
+      "dev": true
+    },
     "rxjs": {
       "version": "6.5.2",
       "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.2.tgz",
@@ -1420,6 +1734,12 @@
       "integrity": "sha512-Ya52jSX2u7QKghxeoFGpLwCtGlt7j0oY9DYb5apt9nPlJ42ID+ulTXESnt/qAQcoSERyZ5sl3LDIOw0nAn/5DA==",
       "dev": true
     },
+    "semver-compare": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/semver-compare/-/semver-compare-1.0.0.tgz",
+      "integrity": "sha1-De4hahyUGrN+nvsXiPavxf9VN/w=",
+      "dev": true
+    },
     "serialize-javascript": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-1.7.0.tgz",
@@ -1447,6 +1767,12 @@
       "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0=",
       "dev": true
     },
+    "slash": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+      "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+      "dev": true
+    },
     "slice-ansi": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-2.1.0.tgz",
@@ -1554,6 +1880,12 @@
       "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
       "dev": true
     },
+    "strip-eof": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
+      "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=",
+      "dev": true
+    },
     "strip-json-comments": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
@@ -1676,6 +2008,12 @@
         "prelude-ls": "~1.1.2"
       }
     },
+    "type-fest": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.4.1.tgz",
+      "integrity": "sha512-IwzA/LSfD2vC1/YDYMv/zHP4rDF1usCwllsDpbolT3D4fUepIO7f9K70jjmUewU/LmGUKJcwcVtDCpnKk4BPMw==",
+      "dev": true
+    },
     "uri-js": {
       "version": "4.2.2",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
diff --git a/package.json b/package.json
index 0bbb503..7f5d754 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
     "build": "rollup -c",
     "dev": "rollup -c -w",
     "eslint": "eslint src",
+    "precommit": "npm run eslint",
     "tidy": "eslint --fix src",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
@@ -34,6 +35,7 @@
     "eslint": "^5.16.0",
     "eslint-config-airbnb-base": "^13.1.0",
     "eslint-plugin-import": "^2.17.3",
+    "husky": "^2.4.1",
     "rollup": "^1.15.6",
     "rollup-plugin-terser": "^5.0.0"
   }