diff --git a/.eslintignore b/.eslintignore
new file mode 100644
index 00000000..a6467301
--- /dev/null
+++ b/.eslintignore
@@ -0,0 +1,24 @@
+.rvmrc
+.DS_Store
+/tmp/
+*.sublime-project
+*.sublime-workspace
+npm-debug.log
+sauce_connect.log*
+.idea
+yarn-error.log
+node_modules
+/handlebars-release.tgz
+
+# Generated files
+lib/handlebars/compiler/parser.js
+/coverage/
+/dist/
+/integration-testing/*/dist/
+
+# Third-party or files that must remain unchanged
+/spec/expected/
+/spec/vendor
+
+# JS-Snippets
+src/*.js
diff --git a/.eslintrc.js b/.eslintrc.js
index 5c55b10f..0abcd580 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,118 +1,67 @@
 module.exports = {
-  "extends": ["eslint:recommended","plugin:compat/recommended"],
-  "globals": {
-    "self": false
+  extends: ['eslint:recommended', 'plugin:compat/recommended', 'prettier'],
+  globals: {
+    self: false
   },
-  "env": {
-    "node": true,
-    "es6": true
+  env: {
+    node: true,
+    es6: true
   },
-  "rules": {
-    // overrides eslint:recommended defaults
-    "no-sparse-arrays": "off",
-    "no-func-assign": "off",
-    "no-console": "warn",
-    "no-debugger": "warn",
-    "no-unreachable": "warn",
-
-    // Possible Errors //
-    //-----------------//
-    "no-unsafe-negation": "error",
+  rules: {
+    'no-console': 'warn',
 
+    // temporarily disabled until the violating places are fixed.
+    'no-func-assign': 'off',
+    'no-sparse-arrays': 'off',
 
     // Best Practices //
     //----------------//
-    "curly": "error",
-    "default-case": "warn",
-    "dot-notation": ["error", { "allowKeywords": false }],
-    "guard-for-in": "warn",
-    "no-alert": "error",
-    "no-caller": "error",
-    "no-div-regex": "warn",
-    "no-eval": "error",
-    "no-extend-native": "error",
-    "no-extra-bind": "error",
-    "no-floating-decimal": "error",
-    "no-implied-eval": "error",
-    "no-iterator": "error",
-    "no-labels": "error",
-    "no-lone-blocks": "error",
-    "no-loop-func": "error",
-    "no-multi-spaces": "error",
-    "no-multi-str": "warn",
-    "no-global-assign": "error",
-    "no-new": "error",
-    "no-new-func": "error",
-    "no-new-wrappers": "error",
-    "no-octal-escape": "error",
-    "no-process-env": "error",
-    "no-proto": "error",
-    "no-return-assign": "error",
-    "no-script-url": "error",
-    "no-self-compare": "error",
-    "no-sequences": "error",
-    "no-throw-literal": "error",
-    "no-unused-expressions": "error",
-    "no-warning-comments": "warn",
-    "no-with": "error",
-    "radix": "error",
-    "wrap-iife": "error",
-    "no-prototype-builtins": "error",
-
+    'default-case': 'warn',
+    'dot-notation': ['error', { allowKeywords: false }],
+    'guard-for-in': 'warn',
+    'no-alert': 'error',
+    'no-caller': 'error',
+    'no-div-regex': 'warn',
+    'no-eval': 'error',
+    'no-extend-native': 'error',
+    'no-extra-bind': 'error',
+    'no-floating-decimal': 'error',
+    'no-implied-eval': 'error',
+    'no-iterator': 'error',
+    'no-labels': 'error',
+    'no-lone-blocks': 'error',
+    'no-loop-func': 'error',
+    'no-multi-str': 'warn',
+    'no-global-assign': 'error',
+    'no-new': 'error',
+    'no-new-func': 'error',
+    'no-new-wrappers': 'error',
+    'no-octal-escape': 'error',
+    'no-process-env': 'error',
+    'no-proto': 'error',
+    'no-return-assign': 'error',
+    'no-script-url': 'error',
+    'no-self-compare': 'error',
+    'no-sequences': 'error',
+    'no-throw-literal': 'error',
+    'no-unused-expressions': 'error',
+    'no-warning-comments': 'warn',
+    'no-with': 'error',
+    radix: 'error',
 
     // Variables //
     //-----------//
-    "no-catch-shadow": "error",
-    "no-label-var": "error",
-    "no-shadow-restricted-names": "error",
-    "no-undef-init": "error",
-    "no-use-before-define": ["error", "nofunc"],
-
-
-    // Stylistic Issues //
-    //------------------//
-    "comma-dangle": ["error", "never"],
-    "quote-props": ["error", "as-needed", { "keywords": true, "unnecessary": false }],
-    "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
-    "camelcase": "error",
-    "comma-spacing": ["error", { "before": false, "after": true }],
-    "comma-style": ["error", "last"],
-    "consistent-this": ["warn", "self"],
-    "eol-last": "error",
-    "func-style": ["error", "declaration"],
-    "key-spacing": ["error", {
-      "beforeColon": false,
-      "afterColon": true
-    }],
-    "new-cap": "error",
-    "new-parens": "error",
-    "no-array-constructor": "error",
-    "no-lonely-if": "error",
-    "no-mixed-spaces-and-tabs": "error",
-    "no-nested-ternary": "warn",
-    "no-new-object": "error",
-    "no-spaced-func": "error",
-    "no-trailing-spaces": "error",
-    "no-extra-parens": ["error", "functions"],
-    "quotes": ["error", "single", "avoid-escape"],
-    "semi": "error",
-    "semi-spacing": ["error", { "before": false, "after": true }],
-    "keyword-spacing": "error",
-    "space-before-blocks": ["error", "always"],
-    "space-before-function-paren": ["error", { "anonymous": "never", "named": "never" }],
-    "space-in-parens": ["error", "never"],
-    "space-infix-ops": "error",
-    "space-unary-ops": "error",
-    "spaced-comment": ["error", "always", { "markers": [","] }],
-    "wrap-regex": "warn",
+    'no-label-var': 'error',
+    'no-undef-init': 'error',
+    'no-use-before-define': ['error', 'nofunc'],
 
     // ECMAScript 6 //
     //--------------//
-    "no-var": "warn"
+    'no-var': 'error'
   },
-  "parserOptions": {
-    "sourceType": "module",
-    "ecmaVersion": 6,
-    "ecmaFeatures": {}
+  parserOptions: {
+    sourceType: 'module',
+    ecmaVersion: 6,
+    ecmaFeatures: {}
   }
 };
diff --git a/.gitignore b/.gitignore
index 4c97eecd..8922abaf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,15 +1,18 @@
-vendor
 .rvmrc
 .DS_Store
-lib/handlebars/compiler/parser.js
-/dist/
 /tmp/
-/coverage/
-node_modules
 *.sublime-project
 *.sublime-workspace
 npm-debug.log
 sauce_connect.log*
 .idea
-yarn-error.log
+/yarn-error.log
+/yarn.lock
+node_modules
 /handlebars-release.tgz
+
+# Generated files
+lib/handlebars/compiler/parser.js
+/coverage/
+/dist/
+/integration-testing/*/dist/
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 00000000..b6bc4621
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,21 @@
+.rvmrc
+.DS_Store
+/tmp/
+*.sublime-project
+*.sublime-workspace
+npm-debug.log
+sauce_connect.log*
+.idea
+yarn-error.log
+node_modules
+/handlebars-release.tgz
+
+# Generated files
+lib/handlebars/compiler/parser.js
+/coverage/
+/dist/
+/integration-testing/*/dist/
+
+# Third-party or files that must remain unchanged
+/spec/expected/
+/spec/vendor
diff --git a/.travis.yml b/.travis.yml
index ce9690a9..a6b141a2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@ language: node_js
 before_install:
 - npm install -g grunt-cli
 script:
+- npm run lint
+- npm run check-format
 - grunt --stack travis
 email:
   on_failure: change
diff --git a/Gruntfile.js b/Gruntfile.js
index 430a0c60..a471f67e 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -4,19 +4,6 @@ module.exports = function(grunt) {
   grunt.initConfig({
     pkg: grunt.file.readJSON('package.json'),
 
-    eslint: {
-      files: [
-        '*.js',
-        'bench/**/*.js',
-        'tasks/**/*.js',
-        'lib/**/!(*.min|parser).js',
-        'spec/**/!(*.amd|json2|require).js',
-        'integration-testing/multi-nodejs-test/*.js',
-        'integration-testing/webpack-test/*.js',
-        'integration-testing/webpack-test/src/*.js'
-      ]
-    },
-
     clean: ['tmp', 'dist', 'lib/handlebars/compiler/parser.js', 'integration-testing/**/node_modules'],
 
     copy: {
@@ -215,7 +202,6 @@ module.exports = function(grunt) {
 
   // Build a new version of the library
   this.registerTask('build', 'Builds a distributable version of the current project', [
-                    'eslint',
                     'bgShell:checkTypes',
                     'parser',
                     'node',
@@ -226,7 +212,7 @@ module.exports = function(grunt) {
   this.registerTask('globals', ['webpack']);
   this.registerTask('tests', ['concat:tests']);
 
-  this.registerTask('release', 'Build final packages', ['eslint', 'amd', 'uglify', 'test:min', 'copy:dist', 'copy:components', 'copy:cdnjs']);
+  this.registerTask('release', 'Build final packages', ['amd', 'uglify', 'test:min', 'copy:dist', 'copy:components', 'copy:cdnjs']);
 
   // Load tasks from npm
   grunt.loadNpmTasks('grunt-contrib-clean');
@@ -238,7 +224,6 @@ module.exports = function(grunt) {
   grunt.loadNpmTasks('grunt-contrib-watch');
   grunt.loadNpmTasks('grunt-babel');
   grunt.loadNpmTasks('grunt-bg-shell');
-  grunt.loadNpmTasks('grunt-eslint');
   grunt.loadNpmTasks('@knappi/grunt-saucelabs');
   grunt.loadNpmTasks('grunt-webpack');
 
diff --git a/bench/.eslintrc b/bench/.eslintrc
index e03f181e..823629cd 100644
--- a/bench/.eslintrc
+++ b/bench/.eslintrc
@@ -1,4 +1,5 @@
 {
+  "extends": "prettier",
   "globals": {
     "require": true
   },
@@ -11,4 +12,4 @@
     "handle-callback-err": 0,
     "no-console": 0
   }
-}
\ No newline at end of file
+}
diff --git a/integration-testing/multi-nodejs-test/.eslintrc.js b/integration-testing/multi-nodejs-test/.eslintrc.js
index 7f583d1c..fcc70559 100644
--- a/integration-testing/multi-nodejs-test/.eslintrc.js
+++ b/integration-testing/multi-nodejs-test/.eslintrc.js
@@ -1,12 +1,13 @@
 module.exports = {
-  "extends": "eslint:recommended",
-  "globals": {
-    "self": false
+  extends: ['eslint:recommended', 'plugin:es5/no-es2015', 'prettier'],
+  globals: {
+    self: false
   },
-  "env": {
-    "node": true
+  env: {
+    node: true
   },
-  "rules": {
-    'no-console': 'off'
+  rules: {
+    'no-console': 'off',
+    'no-var': 'off'
   }
-}
\ No newline at end of file
+};
diff --git a/package-lock.json b/package-lock.json
index 6ed12f6b..3a36a15a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,9 +1,66 @@
 {
   "name": "handlebars",
-  "version": "4.5.2",
+  "version": "4.5.3",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.5.5",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.5.5.tgz",
+      "integrity": "sha512-27d4lZoomVyo51VegxI20xZPuSHusqbQag/ztrBC7wegWoQ1nLREPVSKSW8byhTlzTKyNE4ifaTA6lCp7JjpFw==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.0.0"
+      }
+    },
+    "@babel/highlight": {
+      "version": "7.5.0",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.5.0.tgz",
+      "integrity": "sha512-7dV4eu9gBxoM0dAnj/BCFDW9LFU0zvTrkq0ugM7pnHEgguOEeOz1so2ZghEdzviYzQEED0r4EAgpsBChKy1TRQ==",
+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^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": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "js-tokens": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
+          "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==",
+          "dev": true
+        },
+        "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"
+          }
+        }
+      }
+    },
     "@babel/runtime": {
       "version": "7.6.3",
       "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.6.3.tgz",
@@ -83,6 +140,41 @@
         }
       }
     },
+    "@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"
+      }
+    },
+    "@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.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",
+      "integrity": "sha512-MI4Xx6LHs4Webyvi6EbspgyAb4D2Q2VtnCQ1blOJcoLS6mVa8lNN2rkIy1CVxfTUpoyIbCTkXES1rLXztFD1lg==",
+      "dev": true,
+      "requires": {
+        "any-observable": "^0.3.0"
+      }
+    },
     "@sinonjs/commons": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/@sinonjs/commons/-/commons-1.6.0.tgz",
@@ -127,6 +219,41 @@
       "integrity": "sha512-+iTbntw2IZPb/anVDbypzfQa+ay64MW0Zo8aJ8gZPWMMK6/OubMVb6lUPMagqjOPnmtauXnFCACVl3O7ogjeqQ==",
       "dev": true
     },
+    "@types/events": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@types/events/-/events-3.0.0.tgz",
+      "integrity": "sha512-EaObqwIvayI5a8dCzhFrjKzVwKLxjoG9T6Ppd5CEo07LRKfQ8Yokw54r5+Wq7FaBQ+yXRvQAYPrHwya1/UFt9g==",
+      "dev": true
+    },
+    "@types/glob": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.1.1.tgz",
+      "integrity": "sha512-1Bh06cbWJUHMC97acuD6UMG29nMt0Aqz1vF3guLfG+kHHJhy3AyohZFFxYk2f7Q1SQIrNwvncxAE0N/9s70F2w==",
+      "dev": true,
+      "requires": {
+        "@types/events": "*",
+        "@types/minimatch": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/minimatch": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.3.tgz",
+      "integrity": "sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==",
+      "dev": true
+    },
+    "@types/node": {
+      "version": "12.12.14",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-12.12.14.tgz",
+      "integrity": "sha512-u/SJDyXwuihpwjXy7hOOghagLEV1KdAST6syfnOk6QZAMzZuWZqXy5aYYZbh8Jdpd4escVFP0MvftHNDb9pruA==",
+      "dev": true
+    },
+    "@types/normalize-package-data": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/@types/normalize-package-data/-/normalize-package-data-2.4.0.tgz",
+      "integrity": "sha512-f5j5b/Gf71L+dbqxIpQ4Z2WlmI/mPJ0fOkGGmFgtb6sAu97EPczzbS3/tJKxmcYDj55OX6ssqwDAWOHIYDRDGA==",
+      "dev": true
+    },
     "@types/parsimmon": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/@types/parsimmon/-/parsimmon-1.10.0.tgz",
@@ -162,21 +289,10 @@
       "dev": true
     },
     "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": "^3.0.4"
-      },
-      "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
-        }
-      }
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.1.0.tgz",
+      "integrity": "sha512-tMUqwBWfLFbJbizRmEcWSLw6HnFzfdJs2sOJEOwwtVPMoH/0Ay+E703oZz78VSXZiiDcZrQ5XKjPIUQixhmgVw==",
+      "dev": true
     },
     "agent-base": {
       "version": "4.3.0",
@@ -187,24 +303,36 @@
         "es6-promisify": "^5.0.0"
       }
     },
+    "aggregate-error": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.0.1.tgz",
+      "integrity": "sha512-quoaXsZ9/BLNae5yiNoUz+Nhkwz83GhWwtYFglcjEQB2NDHCIpApbqXxIFnm4Pq/Nvhrsq5sYJFyohrrxnTGAA==",
+      "dev": true,
+      "requires": {
+        "clean-stack": "^2.0.0",
+        "indent-string": "^4.0.0"
+      },
+      "dependencies": {
+        "indent-string": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/indent-string/-/indent-string-4.0.0.tgz",
+          "integrity": "sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg==",
+          "dev": true
+        }
+      }
+    },
     "ajv": {
-      "version": "5.5.2",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
-      "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
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+    },
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@@ -7908,6 +9195,17 @@
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       }
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+    "stringify-object": {
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+      "resolved": "https://registry.npmjs.org/stringify-object/-/stringify-object-3.3.0.tgz",
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+      "dev": true,
+      "requires": {
+        "get-own-enumerable-property-symbols": "^3.0.0",
+        "is-obj": "^1.0.1",
+        "is-regexp": "^1.0.0"
+      }
+    },
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@@ -7944,6 +9242,12 @@
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       "dev": true
     },
+    "strip-final-newline": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/strip-final-newline/-/strip-final-newline-2.0.0.tgz",
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+      "dev": true
+    },
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@@ -7971,53 +9275,60 @@
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       "dev": true
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+    "symbol-observable": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/symbol-observable/-/symbol-observable-1.2.0.tgz",
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+      "dev": true
+    },
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-      "resolved": "https://registry.npmjs.org/table/-/table-4.0.2.tgz",
-      "integrity": "sha1-ozRHN1OR52atNNNIbm4q7chNLjY=",
+      "version": "5.4.6",
+      "resolved": "https://registry.npmjs.org/table/-/table-5.4.6.tgz",
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-        "ajv-keywords": "^2.1.0",
-        "chalk": "^2.1.0",
-        "lodash": "^4.17.4",
-        "slice-ansi": "1.0.0",
-        "string-width": "^2.1.1"
+        "ajv": "^6.10.2",
+        "lodash": "^4.17.14",
+        "slice-ansi": "^2.1.0",
+        "string-width": "^3.0.0"
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-        "ansi-styles": {
-          "version": "3.2.1",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
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-          "dev": true,
-          "requires": {
-            "color-convert": "^1.9.0"
-          }
+        "ansi-regex": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+          "dev": true
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-        "chalk": {
-          "version": "2.4.2",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
-          "integrity": "sha1-zUJUFnelQzPPVBpJEIwUMrRMlCQ=",
-          "dev": true,
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-            "ansi-styles": "^3.2.1",
-            "escape-string-regexp": "^1.0.5",
-            "supports-color": "^5.3.0"
-          }
+        "emoji-regex": {
+          "version": "7.0.3",
+          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
+          "integrity": "sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==",
+          "dev": true
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-          "version": "4.17.11",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
-          "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==",
+          "version": "4.17.15",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+          "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
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-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha1-4uaaRKyHcveKHsCzW2id9lMO/I8=",
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
           "dev": true,
           "requires": {
-            "has-flag": "^3.0.0"
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^4.1.0"
           }
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       }
@@ -8095,7 +9406,7 @@
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       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",
-      "integrity": "sha1-bTQzWIl2jSGyvNoKonfO07G/rfk=",
+      "integrity": "sha512-jRCJlojKnZ3addtTOjdIqoRuPEKBvNXcGYqzO6zWZX8KfKEpnGY5jfggJQ3EjKuu8D4bJRr0y+cYJFmYbImXGw==",
       "dev": true,
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@@ -8339,6 +9650,12 @@
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       "dev": true
     },
+    "type-fest": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.6.0.tgz",
+      "integrity": "sha512-q+MB8nYR1KDLrgr4G5yemftpMC7/QLqVndBmEEdqzmNj5dcFOO4Oo8qlwZE3ULT3+Zim1F8Kq4cBnikNhlCMlg==",
+      "dev": true
+    },
     "type-is": {
       "version": "1.6.16",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.16.tgz",
@@ -8580,6 +9897,12 @@
       "integrity": "sha1-G0r0lV6zB3xQHCOHL8ZROBFYcTE=",
       "dev": true
     },
+    "v8-compile-cache": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.0.tgz",
+      "integrity": "sha512-usZBT3PW+LOjM25wbqIlZwPeJV+3OSz3M1k1Ws8snlW39dZyYL9lOGC5FgPVHfk0jKmjiDV8Z0mIbVQPiwFs7g==",
+      "dev": true
+    },
     "v8flags": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.1.2.tgz",
@@ -8592,7 +9915,7 @@
     "validate-npm-package-license": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
-      "integrity": "sha1-/JH2uce6FchX9MssXe/uw51PQQo=",
+      "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
       "dev": true,
       "requires": {
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@@ -8873,6 +10196,12 @@
       "integrity": "sha1-+OGqHuWlPsW/FR/6CXQqatdpeHY=",
       "dev": true
     },
+    "word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
+      "dev": true
+    },
     "wordwrap": {
       "version": "0.0.3",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
@@ -8917,9 +10246,9 @@
       "dev": true
     },
     "write": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
-      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/write/-/write-1.0.3.tgz",
+      "integrity": "sha512-/lg70HAjtkUgWPVZhZcm+T4hkL8Zbtp1nFNOn3lRrxnlv50SRBv7cR7RqR+GMsd3hUXy9hWBo4CHTbFTcOYwig==",
       "dev": true,
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@@ -8953,12 +10282,6 @@
       "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
       "dev": true
     },
-    "yallist": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
-      "dev": true
-    },
     "yargs": {
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       "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.27.0.tgz",
diff --git a/package.json b/package.json
index 74749d86..df72801d 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,8 @@
     "dtslint": "^0.5.5",
     "dustjs-linkedin": "^2.0.2",
     "eco": "~1.1.0-rc-3",
+    "eslint": "^6.7.2",
+    "eslint-config-prettier": "^6.7.0",
     "eslint-plugin-compat": "^3.3.0",
     "eslint-plugin-es5": "^1.4.1",
     "grunt": "^1.0.3",
@@ -52,13 +54,15 @@
     "grunt-contrib-requirejs": "^1",
     "grunt-contrib-uglify": "^1",
     "grunt-contrib-watch": "^1.1.0",
-    "grunt-eslint": "^20.1.0",
     "grunt-webpack": "^1.0.8",
+    "husky": "^3.1.0",
     "istanbul": "^0.3.0",
     "jison": "~0.3.0",
+    "lint-staged": "^9.5.0",
     "mocha": "^5",
     "mock-stdin": "^0.3.0",
     "mustache": "^2.1.3",
+    "prettier": "^1.19.1",
     "semver": "^5.0.1",
     "sinon": "^7.5.0",
     "typescript": "^3.4.3",
@@ -76,6 +80,9 @@
     "handlebars": "bin/handlebars"
   },
   "scripts": {
+    "format": "prettier --write '**/*.js' && eslint --fix .",
+    "check-format": "prettier --check '**/*.js'",
+    "lint": "eslint .",
     "checkTypes": "dtslint types",
     "test": "grunt"
   },
@@ -98,5 +105,20 @@
     "release-notes.md",
     "runtime.js",
     "types/*.d.ts"
-  ]
+  ],
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged"
+    }
+  },
+  "lint-staged": {
+    "*.{js,css,json,md}": [
+      "prettier --write",
+      "git add"
+    ],
+    "*.js": [
+      "eslint --fix",
+      "git add"
+    ]
+  }
 }
diff --git a/prettier.config.js b/prettier.config.js
new file mode 100644
index 00000000..6593a6b7
--- /dev/null
+++ b/prettier.config.js
@@ -0,0 +1,5 @@
+module.exports = {
+  tabWidth: 2,
+  semi: true,
+  singleQuote: true
+};
diff --git a/spec/.eslintrc b/spec/.eslintrc
index 4bec97f4..076b25a8 100644
--- a/spec/.eslintrc
+++ b/spec/.eslintrc
@@ -1,7 +1,8 @@
 {
   "extends": [
     "../.eslintrc.js",
-    "plugin:es5/no-es2015"
+    "plugin:es5/no-es2015",
+    "prettier"
   ],
   "plugins": [
     "es5"
@@ -43,4 +44,4 @@
     "no-var": "off",
     "dot-notation": "off"
   }
-}
\ No newline at end of file
+}
diff --git a/spec/amd-runtime.html b/spec/amd-runtime.html
index fc413bd6..4cbfd5ca 100644
--- a/spec/amd-runtime.html
+++ b/spec/amd-runtime.html
@@ -26,8 +26,8 @@
       window.expect = chai.expect;
       mocha.setup('bdd');
     </script>
-    <script src="/spec/env/json2.js"></script>
-    <script src="/spec/env/require.js"></script>
+    <script src="/spec/vendor/json2.js"></script>
+    <script src="/spec/vendor/require.js"></script>
 
     <script src="/spec/env/common.js"></script>
     <script>
diff --git a/spec/amd.html b/spec/amd.html
index 9ec44e68..1f783e02 100644
--- a/spec/amd.html
+++ b/spec/amd.html
@@ -27,8 +27,8 @@
       window.expect = chai.expect;
       mocha.setup('bdd');
     </script>
-    <script src="/spec/env/json2.js"></script>
-    <script src="/spec/env/require.js"></script>
+    <script src="/spec/vendor/json2.js"></script>
+    <script src="/spec/vendor/require.js"></script>
 
     <script src="/spec/env/common.js"></script>
     <script>
diff --git a/spec/index.html b/spec/index.html
index b768dff7..3f2068ed 100644
--- a/spec/index.html
+++ b/spec/index.html
@@ -28,7 +28,7 @@
       mocha.setup('bdd');
     </script>
     <script src="/dist/handlebars.js"></script>
-    <script src="/spec/env/json2.js"></script>
+    <script src="/spec/vendor/json2.js"></script>
     <script src="/spec/env/common.js"></script>
     <script>
       var CompilerContext = {
diff --git a/spec/umd-runtime.html b/spec/umd-runtime.html
index 212d4f2d..49b721de 100644
--- a/spec/umd-runtime.html
+++ b/spec/umd-runtime.html
@@ -26,8 +26,8 @@
       window.expect = chai.expect;
       mocha.setup('bdd');
     </script>
-    <script src="/spec/env/json2.js"></script>
-    <script src="/spec/env/require.js"></script>
+    <script src="/spec/vendor/json2.js"></script>
+    <script src="/spec/vendor/require.js"></script>
 
     <script src="/spec/env/common.js"></script>
     <script>
diff --git a/spec/umd.html b/spec/umd.html
index 53d6b271..ae461ed6 100644
--- a/spec/umd.html
+++ b/spec/umd.html
@@ -27,8 +27,8 @@
       window.expect = chai.expect;
       mocha.setup('bdd');
     </script>
-    <script src="/spec/env/json2.js"></script>
-    <script src="/spec/env/require.js"></script>
+    <script src="/spec/vendor/json2.js"></script>
+    <script src="/spec/vendor/require.js"></script>
 
     <script src="/spec/env/common.js"></script>
     <script>
diff --git a/spec/env/json2.js b/spec/vendor/json2.js
similarity index 100%
rename from spec/env/json2.js
rename to spec/vendor/json2.js
diff --git a/spec/env/require.js b/spec/vendor/require.js
similarity index 100%
rename from spec/env/require.js
rename to spec/vendor/require.js
