tree shaking.

https://survivejs.com/webpack/optimizing/tree-shaking/

5 files changed, 732 insertions, 1 deletions

diff --git a/.babelrc b/.babelrc
index 0f74394..d4aee27 100644
--- a/.babelrc
+++ b/.babelrc
@@ -2,7 +2,7 @@
   "plugins": ["syntax-dynamic-import"],
   "presets": [
     [
-      "env",
+      "@babel/preset-env",
       {
         "modules": false,
       }
diff --git a/package-lock.json b/package-lock.json
index 2fb3c02..6ddcd56 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -67,6 +67,57 @@
         }
       }
     },
+    "@babel/helper-annotate-as-pure": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0.tgz",
+      "integrity": "sha512-3UYcJUj9kvSLbLbUIfQTqzcy5VX7GRZ/CCDrnOaZorFFM01aXp1+GJwuFGV4NDDoAS+mOUyHcO6UD/RfqOks3Q==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-builder-binary-assignment-operator-visitor": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-builder-binary-assignment-operator-visitor/-/helper-builder-binary-assignment-operator-visitor-7.1.0.tgz",
+      "integrity": "sha512-qNSR4jrmJ8M1VMM9tibvyRAHXQs2PmaksQF7c1CGJNipfe3D8p+wgNwgso/P2A2r2mdgBWAXljNWR0QRZAMW8w==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-explode-assignable-expression": "^7.1.0",
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-call-delegate": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-call-delegate/-/helper-call-delegate-7.1.0.tgz",
+      "integrity": "sha512-YEtYZrw3GUK6emQHKthltKNZwszBcHK58Ygcis+gVUrF4/FmTVr5CCqQNSfmvg2y+YDEANyYoaLz/SHsnusCwQ==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-hoist-variables": "^7.0.0",
+        "@babel/traverse": "^7.1.0",
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-define-map": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-define-map/-/helper-define-map-7.1.0.tgz",
+      "integrity": "sha512-yPPcW8dc3gZLN+U1mhYV91QU3n5uTbx7DUdf8NnPbjS0RMwBuHi9Xt2MUgppmNz7CJxTBWsGczTiEp1CSOTPRg==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-function-name": "^7.1.0",
+        "@babel/types": "^7.0.0",
+        "lodash": "^4.17.10"
+      }
+    },
+    "@babel/helper-explode-assignable-expression": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-explode-assignable-expression/-/helper-explode-assignable-expression-7.1.0.tgz",
+      "integrity": "sha512-NRQpfHrJ1msCHtKjbzs9YcMmJZOg6mQMmGRB+hbamEdG5PNpaSm95275VD92DvJKuyl0s2sFiDmMZ+EnnvufqA==",
+      "dev": true,
+      "requires": {
+        "@babel/traverse": "^7.1.0",
+        "@babel/types": "^7.0.0"
+      }
+    },
     "@babel/helper-function-name": {
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.1.0.tgz",
@@ -87,6 +138,106 @@
         "@babel/types": "^7.0.0"
       }
     },
+    "@babel/helper-hoist-variables": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-hoist-variables/-/helper-hoist-variables-7.0.0.tgz",
+      "integrity": "sha512-Ggv5sldXUeSKsuzLkddtyhyHe2YantsxWKNi7A+7LeD12ExRDWTRk29JCXpaHPAbMaIPZSil7n+lq78WY2VY7w==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-member-expression-to-functions": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.0.0.tgz",
+      "integrity": "sha512-avo+lm/QmZlv27Zsi0xEor2fKcqWG56D5ae9dzklpIaY7cQMK5N8VSpaNVPPagiqmy7LrEjK1IWdGMOqPu5csg==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-module-imports": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.0.0.tgz",
+      "integrity": "sha512-aP/hlLq01DWNEiDg4Jn23i+CXxW/owM4WpDLFUbpjxe4NS3BhLVZQ5i7E0ZrxuQ/vwekIeciyamgB1UIYxxM6A==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-module-transforms": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.1.0.tgz",
+      "integrity": "sha512-0JZRd2yhawo79Rcm4w0LwSMILFmFXjugG3yqf+P/UsKsRS1mJCmMwwlHDlMg7Avr9LrvSpp4ZSULO9r8jpCzcw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-module-imports": "^7.0.0",
+        "@babel/helper-simple-access": "^7.1.0",
+        "@babel/helper-split-export-declaration": "^7.0.0",
+        "@babel/template": "^7.1.0",
+        "@babel/types": "^7.0.0",
+        "lodash": "^4.17.10"
+      }
+    },
+    "@babel/helper-optimise-call-expression": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.0.0.tgz",
+      "integrity": "sha512-u8nd9NQePYNQV8iPWu/pLLYBqZBa4ZaY1YWRFMuxrid94wKI1QNt67NEZ7GAe5Kc/0LLScbim05xZFWkAdrj9g==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-plugin-utils": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.0.0.tgz",
+      "integrity": "sha512-CYAOUCARwExnEixLdB6sDm2dIJ/YgEAKDM1MOeMeZu9Ld/bDgVo8aiWrXwcY7OBh+1Ea2uUcVRcxKk0GJvW7QA==",
+      "dev": true
+    },
+    "@babel/helper-regex": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-regex/-/helper-regex-7.0.0.tgz",
+      "integrity": "sha512-TR0/N0NDCcUIUEbqV6dCO+LptmmSQFQ7q70lfcEB4URsjD0E1HzicrwUH+ap6BAQ2jhCX9Q4UqZy4wilujWlkg==",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.17.10"
+      }
+    },
+    "@babel/helper-remap-async-to-generator": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-remap-async-to-generator/-/helper-remap-async-to-generator-7.1.0.tgz",
+      "integrity": "sha512-3fOK0L+Fdlg8S5al8u/hWE6vhufGSn0bN09xm2LXMy//REAF8kDCrYoOBKYmA8m5Nom+sV9LyLCwrFynA8/slg==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-annotate-as-pure": "^7.0.0",
+        "@babel/helper-wrap-function": "^7.1.0",
+        "@babel/template": "^7.1.0",
+        "@babel/traverse": "^7.1.0",
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-replace-supers": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.1.0.tgz",
+      "integrity": "sha512-BvcDWYZRWVuDeXTYZWxekQNO5D4kO55aArwZOTFXw6rlLQA8ZaDicJR1sO47h+HrnCiDFiww0fSPV0d713KBGQ==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-member-expression-to-functions": "^7.0.0",
+        "@babel/helper-optimise-call-expression": "^7.0.0",
+        "@babel/traverse": "^7.1.0",
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-simple-access": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-simple-access/-/helper-simple-access-7.1.0.tgz",
+      "integrity": "sha512-Vk+78hNjRbsiu49zAPALxTb+JUQCz1aolpd8osOF16BGnLtseD21nbHgLPGUwrXEurZgiCOUmvs3ExTu4F5x6w==",
+      "dev": true,
+      "requires": {
+        "@babel/template": "^7.1.0",
+        "@babel/types": "^7.0.0"
+      }
+    },
     "@babel/helper-split-export-declaration": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.0.0.tgz",
@@ -96,6 +247,18 @@
         "@babel/types": "^7.0.0"
       }
     },
+    "@babel/helper-wrap-function": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-wrap-function/-/helper-wrap-function-7.1.0.tgz",
+      "integrity": "sha512-R6HU3dete+rwsdAfrOzTlE9Mcpk4RjU3aX3gi9grtmugQY0u79X7eogUvfXA5sI81Mfq1cn6AgxihfN33STjJA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-function-name": "^7.1.0",
+        "@babel/template": "^7.1.0",
+        "@babel/traverse": "^7.1.0",
+        "@babel/types": "^7.0.0"
+      }
+    },
     "@babel/helpers": {
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.1.1.tgz",
@@ -132,6 +295,524 @@
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       "dev": true
     },
+    "@babel/plugin-proposal-async-generator-functions": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-async-generator-functions/-/plugin-proposal-async-generator-functions-7.1.0.tgz",
+      "integrity": "sha512-Fq803F3Jcxo20MXUSDdmZZXrPe6BWyGcWBPPNB/M7WaUYESKDeKMOGIxEzQOjGSmW/NWb6UaPZrtTB2ekhB/ew==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/helper-remap-async-to-generator": "^7.1.0",
+        "@babel/plugin-syntax-async-generators": "^7.0.0"
+      }
+    },
+    "@babel/plugin-proposal-json-strings": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-json-strings/-/plugin-proposal-json-strings-7.0.0.tgz",
+      "integrity": "sha512-kfVdUkIAGJIVmHmtS/40i/fg/AGnw/rsZBCaapY5yjeO5RA9m165Xbw9KMOu2nqXP5dTFjEjHdfNdoVcHv133Q==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/plugin-syntax-json-strings": "^7.0.0"
+      }
+    },
+    "@babel/plugin-proposal-object-rest-spread": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.0.0.tgz",
+      "integrity": "sha512-14fhfoPcNu7itSen7Py1iGN0gEm87hX/B+8nZPqkdmANyyYWYMY2pjA3r8WXbWVKMzfnSNS0xY8GVS0IjXi/iw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.0.0",
+        "@babel/plugin-syntax-object-rest-spread": "^7.0.0"
+      }
+    },
+    "@babel/plugin-proposal-optional-catch-binding": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-optional-catch-binding/-/plugin-proposal-optional-catch-binding-7.0.0.tgz",
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+      "requires": {
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+        "@babel/plugin-syntax-optional-catch-binding": "^7.0.0"
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+    "@babel/plugin-proposal-unicode-property-regex": {
+      "version": "7.0.0",
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+        "@babel/helper-regex": "^7.0.0",
+        "regexpu-core": "^4.2.0"
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+      "dependencies": {
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+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/regexpu-core/-/regexpu-core-4.2.0.tgz",
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+            "regenerate-unicode-properties": "^7.0.0",
+            "regjsgen": "^0.4.0",
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+        "globals": "^11.1.0"
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+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/unicode-match-property-ecmascript/-/unicode-match-property-ecmascript-1.0.4.tgz",
+      "integrity": "sha512-L4Qoh15vTfntsn4P1zqnHulG0LdXgjSO035fEpdtp6YxXhMT51Q6vgM5lYdG/5X3MjS+k/Y9Xw4SFCY9IkR0rg==",
+      "dev": true,
+      "requires": {
+        "unicode-canonical-property-names-ecmascript": "^1.0.4",
+        "unicode-property-aliases-ecmascript": "^1.0.4"
+      }
+    },
+    "unicode-match-property-value-ecmascript": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-1.0.2.tgz",
+      "integrity": "sha512-Rx7yODZC1L/T8XKo/2kNzVAQaRE88AaMvI1EF/Xnj3GW2wzN6fop9DDWuFAKUVFH7vozkz26DzP0qyWLKLIVPQ==",
+      "dev": true
+    },
+    "unicode-property-aliases-ecmascript": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-1.0.4.tgz",
+      "integrity": "sha512-2WSLa6OdYd2ng8oqiGIWnJqyFArvhn+5vgx5GTxMbUYjCYKUcuKS62YLFF0R/BDGlB1yzXjQOLtPAfHsgirEpg==",
+      "dev": true
+    },
     "union-value": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.0.tgz",
diff --git a/package.json b/package.json
index 211619d..ecb2671 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
   "license": "ISC",
   "devDependencies": {
     "@babel/core": "^7.1.1",
+    "@babel/preset-env": "^7.1.0",
     "autoprefixer": "^9.1.5",
     "babel-loader": "^8.0.4",
     "babel-plugin-syntax-dynamic-import": "^6.18.0",
diff --git a/src/index.js b/src/index.js
index 27d5940..db8dfa1 100644
--- a/src/index.js
+++ b/src/index.js
@@ -3,5 +3,7 @@ import 'react-dom';
 import component from './component';
 import "./main.css";
 import 'purecss';
+import { bake } from "./shake";
 
+bake();
 document.body.appendChild(component());
diff --git a/src/shake.js b/src/shake.js
new file mode 100644
index 0000000..049a077
--- /dev/null
+++ b/src/shake.js
@@ -0,0 +1,4 @@
+const shake = () => console.log("shake");
+const bake = () => console.log("bake");
+
+export { shake, bake };