diff --git a/.eslintignore b/.eslintignore
new file mode 100644
index 00000000..6cfa22ea
--- /dev/null
+++ b/.eslintignore
@@ -0,0 +1,4 @@
+node_modules/
+build/
+package-lock.json
+.vscode/
diff --git a/.lintstagedrc.js b/.lintstagedrc.js
new file mode 100644
index 00000000..8c2d6a96
--- /dev/null
+++ b/.lintstagedrc.js
@@ -0,0 +1,15 @@
+const { CLIEngine } = require("eslint");
+
+// see https://github.com/okonet/lint-staged#how-can-i-ignore-files-from-eslintignore-
+//  for explanation
+const cli = new CLIEngine({});
+
+module.exports = {
+  "*.{js,ts,tsx,json}": files => {
+    return (
+      "eslint --max-warnings=0 " +
+      files.filter(file => !cli.isPathIgnored(file)).join(" ")
+    );
+  },
+  "*.{js,css,scss,json,md,ts,tsx,html,yml}": ["prettier --write"]
+};
diff --git a/package-lock.json b/package-lock.json
index 82b6cac2..0460c09f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1234,11 +1234,39 @@
         "glob-to-regexp": "^0.3.0"
       }
     },
+    "@nodelib/fs.scandir": {
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.3.tgz",
+      "integrity": "sha512-eGmwYQn3gxo4r7jdQnkrrN6bY478C3P+a/y72IJukF8LjB6ZHeB3c+Ehacj3sYeSmUXGlnA67/PmbM9CVwL7Dw==",
+      "dev": true,
+      "requires": {
+        "@nodelib/fs.stat": "2.0.3",
+        "run-parallel": "^1.1.9"
+      },
+      "dependencies": {
+        "@nodelib/fs.stat": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-2.0.3.tgz",
+          "integrity": "sha512-bQBFruR2TAwoevBEd/NWMoAAtNGzTRgdrqnYCc7dhzfoNvqPzLyqlEQnzZ3kVnNrSp25iyxE00/3h2fqGAGArA==",
+          "dev": true
+        }
+      }
+    },
     "@nodelib/fs.stat": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-1.1.3.tgz",
       "integrity": "sha512-shAmDyaQC4H92APFoIaVDHCx5bStIocgvbwQyxPRrbUY20V1EYTbSDchWbuwlMG3V17cprZhA6+78JfB+3DTPw=="
     },
+    "@nodelib/fs.walk": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.walk/-/fs.walk-1.2.4.tgz",
+      "integrity": "sha512-1V9XOY4rDW0rehzbrcqAmHnz8e7SKvX27gh8Gt2WgB0+pdzdiLV83p72kZPU+jvMbS1qU5mauP2iOvO8rhmurQ==",
+      "dev": true,
+      "requires": {
+        "@nodelib/fs.scandir": "2.1.3",
+        "fastq": "^1.6.0"
+      }
+    },
     "@samverschueren/stream-to-observable": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/@samverschueren/stream-to-observable/-/stream-to-observable-0.3.0.tgz",
@@ -4597,6 +4625,12 @@
       "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
       "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
     },
+    "detect-indent": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/detect-indent/-/detect-indent-6.0.0.tgz",
+      "integrity": "sha512-oSyFlqaTHCItVRGK5RmrmjB+CmaMOW7IaNA/kdxqhoa6d17j/5ce9O9eWXmV/KEdRwqpQA+Vqe8a8Bsybu4YnA==",
+      "dev": true
+    },
     "detect-newline": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/detect-newline/-/detect-newline-2.1.0.tgz",
@@ -4631,6 +4665,12 @@
         }
       }
     },
+    "diff-match-patch": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/diff-match-patch/-/diff-match-patch-1.0.4.tgz",
+      "integrity": "sha512-Uv3SW8bmH9nAtHKaKSanOQmj2DnlH65fUpcrMdfdaOxUG02QQ4YGZ8AE7kKOMisF7UqvOlGKVYWRvezdncW9lg==",
+      "dev": true
+    },
     "diff-sequences": {
       "version": "24.9.0",
       "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-24.9.0.tgz",
@@ -5346,6 +5386,22 @@
         }
       }
     },
+    "eslint-plugin-json-format": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-json-format/-/eslint-plugin-json-format-2.0.1.tgz",
+      "integrity": "sha512-eWT0sNqIEYzKqbej2dvz+/oQ4JQxthE3i+izjInIdfbsPfVgBtiWbmagkgKStje0LJqo9FATx1LWl6xcuxqsBQ==",
+      "dev": true,
+      "requires": {
+        "common-tags": "^1.8.0",
+        "debug": "^4.1.1",
+        "diff-match-patch": "^1.0.4",
+        "json-fixer": "^1.3.2",
+        "line-column": "^1.0.2",
+        "lodash": "^4.17.15",
+        "minimatch": "^3.0.4",
+        "sort-package-json": "^1.22.1"
+      }
+    },
     "eslint-plugin-jsx-a11y": {
       "version": "6.2.3",
       "resolved": "https://registry.npmjs.org/eslint-plugin-jsx-a11y/-/eslint-plugin-jsx-a11y-6.2.3.tgz",
@@ -5806,6 +5862,15 @@
       "resolved": "https://registry.npmjs.org/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz",
       "integrity": "sha1-PYpcZog6FqMMqGQ+hR8Zuqd5eRc="
     },
+    "fastq": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.6.0.tgz",
+      "integrity": "sha512-jmxqQ3Z/nXoeyDmWAzF9kH1aGZSis6e/SbfPmJpUnyZ0ogr6iscHQaml4wsEepEWSdtmpy+eVXmCRIMpxaXqOA==",
+      "dev": true,
+      "requires": {
+        "reusify": "^1.0.0"
+      }
+    },
     "faye-websocket": {
       "version": "0.10.0",
       "resolved": "https://registry.npmjs.org/faye-websocket/-/faye-websocket-0.10.0.tgz",
@@ -6288,6 +6353,12 @@
         "assert-plus": "^1.0.0"
       }
     },
+    "git-hooks-list": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/git-hooks-list/-/git-hooks-list-1.0.2.tgz",
+      "integrity": "sha512-C3c/FG6Pgh053+yK/CnNNYJo5mgCa3OeI+cPxPIl0tyMLm1mGfiV0NX0LrhnjVoX7dfkR78WyW2kvFVHvAlneg==",
+      "dev": true
+    },
     "glob": {
       "version": "7.1.6",
       "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
@@ -8553,6 +8624,28 @@
       "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-2.5.2.tgz",
       "integrity": "sha512-OYu7XEzjkCQ3C5Ps3QIZsQfNpqoJyZZA99wd9aWd05NCtC5pWOkShK2mkL6HXQR6/Cy2lbNdPlZBpuQHXE63gA=="
     },
+    "json-fixer": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/json-fixer/-/json-fixer-1.4.0.tgz",
+      "integrity": "sha512-9Nbl396T9eRPvrUxKnBQeiVgQjuBhvumptJfwSAdjQ+cjUqJ981O8Kts/A7ZEID3SbRr76uTOayxVTi+AbAf/A==",
+      "dev": true,
+      "requires": {
+        "@babel/runtime": "^7.7.6",
+        "chalk": "^2.4.2",
+        "pegjs": "^0.10.0"
+      },
+      "dependencies": {
+        "@babel/runtime": {
+          "version": "7.8.3",
+          "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.8.3.tgz",
+          "integrity": "sha512-fVHx1rzEmwB130VTkLnxR+HmxcTjGzH12LYQcFFoBwakMd3aOMD4OsRN7tGG/UOYE2ektgFrS8uACAoRk1CY0w==",
+          "dev": true,
+          "requires": {
+            "regenerator-runtime": "^0.13.2"
+          }
+        }
+      }
+    },
     "json-parse-better-errors": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/json-parse-better-errors/-/json-parse-better-errors-1.0.2.tgz",
@@ -8691,6 +8784,27 @@
         "type-check": "~0.3.2"
       }
     },
+    "line-column": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/line-column/-/line-column-1.0.2.tgz",
+      "integrity": "sha1-0lryk2tvSEkXKzEuR5LR2Ye8NKI=",
+      "dev": true,
+      "requires": {
+        "isarray": "^1.0.0",
+        "isobject": "^2.0.0"
+      },
+      "dependencies": {
+        "isobject": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/isobject/-/isobject-2.1.0.tgz",
+          "integrity": "sha1-8GVWEJaj8dou9GJy+BXIQNh+DIk=",
+          "dev": true,
+          "requires": {
+            "isarray": "1.0.0"
+          }
+        }
+      }
+    },
     "lines-and-columns": {
       "version": "1.1.6",
       "resolved": "https://registry.npmjs.org/lines-and-columns/-/lines-and-columns-1.1.6.tgz",
@@ -10816,6 +10930,12 @@
         "sha.js": "^2.4.8"
       }
     },
+    "pegjs": {
+      "version": "0.10.0",
+      "resolved": "https://registry.npmjs.org/pegjs/-/pegjs-0.10.0.tgz",
+      "integrity": "sha1-z4uvrm7d/0tafvsYUmnqr0YQ3b0=",
+      "dev": true
+    },
     "performance-now": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
@@ -12899,6 +13019,12 @@
       "resolved": "https://registry.npmjs.org/retry/-/retry-0.12.0.tgz",
       "integrity": "sha1-G0KmJmoh8HQh0bC1S33BZ7AcATs="
     },
+    "reusify": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/reusify/-/reusify-1.0.4.tgz",
+      "integrity": "sha512-U9nH88a3fc/ekCF1l0/UP1IosiuIjyTh7hBvXVMHYgVcfGvt897Xguj2UOLDeI5BG2m7/uwyaLVT6fbtCwTyzw==",
+      "dev": true
+    },
     "rewire": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/rewire/-/rewire-4.0.1.tgz",
@@ -13343,6 +13469,12 @@
         "is-promise": "^2.1.0"
       }
     },
+    "run-parallel": {
+      "version": "1.1.9",
+      "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.1.9.tgz",
+      "integrity": "sha512-DEqnSRTDw/Tc3FXf49zedI638Z9onwUotBMiUFKmrO2sdFKIbXamXGQ3Axd4qgphxKB4kw/qP1w5kTxnfU1B9Q==",
+      "dev": true
+    },
     "run-queue": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/run-queue/-/run-queue-1.0.3.tgz",
@@ -14175,6 +14307,144 @@
         "is-plain-obj": "^1.0.0"
       }
     },
+    "sort-object-keys": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/sort-object-keys/-/sort-object-keys-1.1.3.tgz",
+      "integrity": "sha512-855pvK+VkU7PaKYPc+Jjnmt4EzejQHyhhF33q31qG8x7maDzkeFhAAThdCYay11CISO+qAMwjOBP+fPZe0IPyg==",
+      "dev": true
+    },
+    "sort-package-json": {
+      "version": "1.39.0",
+      "resolved": "https://registry.npmjs.org/sort-package-json/-/sort-package-json-1.39.0.tgz",
+      "integrity": "sha512-/S/iwkf9lcb5Eb/l/BoImDIa4EJWd7is5yJ4oJShh0+sH5Iz5XJRbHpLkNpxuo850uoR6Ygbma9GwfMoEULwEQ==",
+      "dev": true,
+      "requires": {
+        "detect-indent": "^6.0.0",
+        "detect-newline": "3.1.0",
+        "git-hooks-list": "1.0.2",
+        "globby": "10.0.1",
+        "sort-object-keys": "^1.1.3"
+      },
+      "dependencies": {
+        "@nodelib/fs.stat": {
+          "version": "2.0.3",
+          "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-2.0.3.tgz",
+          "integrity": "sha512-bQBFruR2TAwoevBEd/NWMoAAtNGzTRgdrqnYCc7dhzfoNvqPzLyqlEQnzZ3kVnNrSp25iyxE00/3h2fqGAGArA==",
+          "dev": true
+        },
+        "array-union": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/array-union/-/array-union-2.1.0.tgz",
+          "integrity": "sha512-HGyxoOTYUyCM6stUe6EJgnd4EoewAI7zMdfqO+kGjnlZmBDz/cR5pf8r/cR4Wq60sL/p0IkcjUEEPwS3GFrIyw==",
+          "dev": true
+        },
+        "braces": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
+          "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==",
+          "dev": true,
+          "requires": {
+            "fill-range": "^7.0.1"
+          }
+        },
+        "detect-newline": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/detect-newline/-/detect-newline-3.1.0.tgz",
+          "integrity": "sha512-TLz+x/vEXm/Y7P7wn1EJFNLxYpUD4TgMosxY6fAVJUnJMbupHBOncxyWUG9OpTaH9EBD7uFI5LfEgmMOc54DsA==",
+          "dev": true
+        },
+        "dir-glob": {
+          "version": "3.0.1",
+          "resolved": "https://registry.npmjs.org/dir-glob/-/dir-glob-3.0.1.tgz",
+          "integrity": "sha512-WkrWp9GR4KXfKGYzOLmTuGVi1UWFfws377n9cc55/tb6DuqyF6pcQ5AbiHEshaDpY9v6oaSr2XCDidGmMwdzIA==",
+          "dev": true,
+          "requires": {
+            "path-type": "^4.0.0"
+          }
+        },
+        "fast-glob": {
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.1.1.tgz",
+          "integrity": "sha512-nTCREpBY8w8r+boyFYAx21iL6faSsQynliPHM4Uf56SbkyohCNxpVPEH9xrF5TXKy+IsjkPUHDKiUkzBVRXn9g==",
+          "dev": true,
+          "requires": {
+            "@nodelib/fs.stat": "^2.0.2",
+            "@nodelib/fs.walk": "^1.2.3",
+            "glob-parent": "^5.1.0",
+            "merge2": "^1.3.0",
+            "micromatch": "^4.0.2"
+          }
+        },
+        "fill-range": {
+          "version": "7.0.1",
+          "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
+          "integrity": "sha512-qOo9F+dMUmC2Lcb4BbVvnKJxTPjCm+RRpe4gDuGrzkL7mEVl/djYSu2OdQ2Pa302N4oqkSg9ir6jaLWJ2USVpQ==",
+          "dev": true,
+          "requires": {
+            "to-regex-range": "^5.0.1"
+          }
+        },
+        "globby": {
+          "version": "10.0.1",
+          "resolved": "https://registry.npmjs.org/globby/-/globby-10.0.1.tgz",
+          "integrity": "sha512-sSs4inE1FB2YQiymcmTv6NWENryABjUNPeWhOvmn4SjtKybglsyPZxFB3U1/+L1bYi0rNZDqCLlHyLYDl1Pq5A==",
+          "dev": true,
+          "requires": {
+            "@types/glob": "^7.1.1",
+            "array-union": "^2.1.0",
+            "dir-glob": "^3.0.1",
+            "fast-glob": "^3.0.3",
+            "glob": "^7.1.3",
+            "ignore": "^5.1.1",
+            "merge2": "^1.2.3",
+            "slash": "^3.0.0"
+          }
+        },
+        "ignore": {
+          "version": "5.1.4",
+          "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.1.4.tgz",
+          "integrity": "sha512-MzbUSahkTW1u7JpKKjY7LCARd1fU5W2rLdxlM4kdkayuCwZImjkpluF9CM1aLewYJguPDqewLam18Y6AU69A8A==",
+          "dev": true
+        },
+        "is-number": {
+          "version": "7.0.0",
+          "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
+          "integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==",
+          "dev": true
+        },
+        "micromatch": {
+          "version": "4.0.2",
+          "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-4.0.2.tgz",
+          "integrity": "sha512-y7FpHSbMUMoyPbYUSzO6PaZ6FyRnQOpHuKwbo1G+Knck95XVU4QAiKdGEnj5wwoS7PlOgthX/09u5iFJ+aYf5Q==",
+          "dev": true,
+          "requires": {
+            "braces": "^3.0.1",
+            "picomatch": "^2.0.5"
+          }
+        },
+        "path-type": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/path-type/-/path-type-4.0.0.tgz",
+          "integrity": "sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==",
+          "dev": true
+        },
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        },
+        "to-regex-range": {
+          "version": "5.0.1",
+          "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+          "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+          "dev": true,
+          "requires": {
+            "is-number": "^7.0.0"
+          }
+        }
+      }
+    },
     "source-list-map": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/source-list-map/-/source-list-map-2.0.1.tgz",
diff --git a/package.json b/package.json
index af3d60f7..8d029205 100644
--- a/package.json
+++ b/package.json
@@ -24,15 +24,34 @@
     "@types/react": "16.9.17",
     "@types/react-color": "3.0.1",
     "@types/react-dom": "16.9.4",
+    "eslint-plugin-json-format": "2.0.1",
     "husky": "4.0.10",
     "lint-staged": "10.0.0",
     "node-sass": "4.13.1",
     "prettier": "1.19.1",
-    "rewire": "^4.0.1",
+    "rewire": "4.0.1",
     "typescript": "3.7.5"
   },
   "eslintConfig": {
-    "extends": "react-app"
+    "extends": "react-app",
+    "plugins": [
+      "json-format"
+    ],
+    "settings": {
+      "json/sort-package-json": false
+    },
+    "rules": {
+      "no-console": [
+        "warn",
+        {
+          "allow": [
+            "warn",
+            "error",
+            "info"
+          ]
+        }
+      ]
+    }
   },
   "homepage": "https://excalidraw.com",
   "husky": {
@@ -40,15 +59,6 @@
       "pre-commit": "lint-staged"
     }
   },
-  "lint-staged": {
-    "*.{js,css,scss,json,md,ts,tsx,html,yml}": [
-      "prettier --write",
-      "git add"
-    ],
-    "*.{js,ts,tsx}": [
-      "eslint --max-warnings 0"
-    ]
-  },
   "main": "src/index.js",
   "name": "excalidraw",
   "scripts": {
@@ -56,7 +66,7 @@
     "build-node": "./scripts/build-node.js",
     "eject": "react-scripts eject",
     "fix": "npm run prettier -- --write",
-    "prettier": "prettier \"**/*.{js,css,scss,json,md,ts,tsx,html,yml}\"",
+    "prettier": "prettier \"**/*.{js,css,scss,json,md,ts,tsx,html,yml}\" --ignore-path=.eslintignore",
     "start": "react-scripts start",
     "test": "npm run test:app",
     "test:app": "react-scripts test --env=jsdom --passWithNoTests",
diff --git a/src/index-node.ts b/src/index-node.ts
index 3a296ce8..cf25f30e 100644
--- a/src/index-node.ts
+++ b/src/index-node.ts
@@ -71,4 +71,6 @@ const fs = require("fs");
 const out = fs.createWriteStream("test.png");
 const stream = canvas.createPNGStream();
 stream.pipe(out);
-out.on("finish", () => console.log("test.png was created."));
+out.on("finish", () => {
+  console.info("test.png was created.");
+});