chore: start tracking treeshakability (#179)

This diff adds size snapshot entry with esm bundle which allows to see
that some part of the code is not treeshakable.

This project is used by material-ui which provides only path imports
which looks very scary (a lot of import statement). So this project
should be treeshakable to let its users safely consumer from single
entry point and do not care about big bundle size.

Author: TrySound

.size-snapshot.json

@@ -1,12 +1,26 @@
 {
   "dist/index.umd.js": {
-    "bundled": 51215,
-    "minified": 18354,
-    "gzipped": 5879
+    "bundled": 50893,
+    "minified": 18318,
+    "gzipped": 5870
   },
   "dist/index.umd.min.js": {
-    "bundled": 28017,
-    "minified": 10703,
-    "gzipped": 3585
+    "bundled": 26552,
+    "minified": 10685,
+    "gzipped": 3580
+  },
+  "dist/index.esm.js": {
+    "bundled": 10870,
+    "minified": 6168,
+    "gzipped": 1936,
+    "treeshaked": {
+      "rollup": {
+        "code": 5138,
+        "import_statements": 137
+      },
+      "webpack": {
+        "code": 5875
+      }
+    }
   }
 }

package.json

@@ -16,7 +16,7 @@
   "scripts": {
     "build": "npm run build:clean && npm run build:esm && npm run build:cjs && npm run build:umd && npm run build:flow",
     "build:clean": "rimraf dist/ && rimraf lib/",
-    "build:umd": "rollup -c",
+    "build:umd": "rollup -c && rimraf dist/index.esm.js",
     "build:esm": "cross-env BABEL_ENV=esm babel src --out-dir lib/esm",
     "build:cjs": "cross-env BABEL_ENV=cjs babel src --out-dir lib/cjs",
     "build:flow": "flow-copy-source --ignore '{__mocks__/*,*.test}.js' src lib/cjs",
@@ -102,13 +102,13 @@
     "react-spring": "^4.0.1",
     "recompose": "^0.26.0",
     "rimraf": "^2.6.2",
-    "rollup": "^0.58.2",
+    "rollup": "^0.59.3",
     "rollup-plugin-babel": "^3.0.4",
     "rollup-plugin-commonjs": "^9.1.3",
     "rollup-plugin-node-resolve": "^3.3.0",
     "rollup-plugin-replace": "^2.0.0",
-    "rollup-plugin-size-snapshot": "^0.4.0",
-    "rollup-plugin-uglify": "^3.0.0",
+    "rollup-plugin-size-snapshot": "^0.5.1",
+    "rollup-plugin-uglify": "^4.0.0",
     "typescript": "^2.8.1"
   }
 }

rollup.config.js

@@ -2,7 +2,7 @@ import nodeResolve from 'rollup-plugin-node-resolve';
 import commonjs from 'rollup-plugin-commonjs';
 import babel from 'rollup-plugin-babel';
 import replace from 'rollup-plugin-replace';
-import uglify from 'rollup-plugin-uglify';
+import { uglify } from 'rollup-plugin-uglify';
 import { sizeSnapshot } from 'rollup-plugin-size-snapshot';
 
 const input = './src/index.js';
@@ -54,4 +54,12 @@ export default [
       uglify(),
     ],
   },
+
+  {
+    input,
+    output: { file: 'dist/index.esm.js', format: 'esm' },
+    external: id =>
+      !id.startsWith('\0') && !id.startsWith('.') && !id.startsWith('/'),
+    plugins: [babel(getBabelOptions()), sizeSnapshot()],
+  },
 ];

yarn.lock

@@ -8,6 +8,12 @@
   dependencies:
     "@babel/highlight" "7.0.0-beta.42"
 
+"@babel/code-frame@^7.0.0-beta.47":
+  version "7.0.0-beta.48"
+  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0-beta.48.tgz#ff1c11060a7c1206e0b81e95286cfc2ca3ac405f"
+  dependencies:
+    "@babel/highlight" "7.0.0-beta.48"
+
 "@babel/[email protected]":
   version "7.0.0-beta.42"
   resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.0.0-beta.42.tgz#777bb50f39c94a7e57f73202d833141f8159af33"
@@ -53,6 +59,14 @@
     esutils "^2.0.2"
     js-tokens "^3.0.0"
 
+"@babel/[email protected]":
+  version "7.0.0-beta.48"
+  resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.0.0-beta.48.tgz#2f225dc995899858f27858d9011fdb75f70bcf96"
+  dependencies:
+    chalk "^2.0.0"
+    esutils "^2.0.2"
+    js-tokens "^3.0.0"
+
 "@babel/[email protected]":
   version "7.0.0-beta.42"
   resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.0.0-beta.42.tgz#7186d4e70d44cdec975049ba0a73bdaf5cdee052"
@@ -97,9 +111,9 @@
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/@emotion/is-prop-valid/-/is-prop-valid-0.5.2.tgz#4f47717c2bcce8759e11997520e6bcb14326f54a"
 
-"@types/[email protected].38":
-  version "0.0.38"
-  resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.38.tgz#c1be40aa933723c608820a99a373a16d215a1ca2"
+"@types/[email protected].39":
+  version "0.0.39"
+  resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.39.tgz#e177e699ee1b8c22d23174caaa7422644389509f"
 
 "@types/node@*":
   version "9.6.1"
@@ -139,7 +153,7 @@ acorn@^3.0.4:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-3.3.0.tgz#45e37fb39e8da3f25baee3ff5369e2bb5f22017a"
 
-acorn@^5.0.0, acorn@^5.3.0, acorn@^5.5.0:
+acorn@^5.0.0, acorn@^5.3.0, acorn@^5.5.0, acorn@^5.5.3:
   version "5.5.3"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.5.3.tgz#f473dd47e0277a08e28e9bec5aeeb04751f0b8c9"
 
@@ -1678,6 +1692,10 @@ commander@~2.13.0:
   version "2.13.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.13.0.tgz#6964bca67685df7c1f1430c584f07d7597885b9c"
 
+commander@~2.14.1:
+  version "2.14.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.14.1.tgz#2235123e37af8ca3c65df45b026dbd357b01b9aa"
+
 commondir@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
@@ -2653,7 +2671,7 @@ falafel@^2.1.0:
     isarray "0.0.1"
     object-keys "^1.0.6"
 
-fast-deep-equal@^1.0.0, fast-deep-equal@^1.1.0:
+fast-deep-equal@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-1.1.0.tgz#c053477817c86b51daa853c81e059b733d023614"
 
@@ -3796,7 +3814,7 @@ jest-config@^22.4.3:
     jest-validate "^22.4.3"
     pretty-format "^22.4.3"
 
-jest-diff@^22.4.0, jest-diff@^22.4.3:
+jest-diff@^22.4.3:
   version "22.4.3"
   resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-22.4.3.tgz#e18cc3feff0aeef159d02310f2686d4065378030"
   dependencies:
@@ -3805,6 +3823,15 @@ jest-diff@^22.4.0, jest-diff@^22.4.3:
     jest-get-type "^22.4.3"
     pretty-format "^22.4.3"
 
+jest-diff@^23.0.0:
+  version "23.0.0"
+  resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-23.0.0.tgz#0a00b2157f518eec338121ccf8879c529269a88e"
+  dependencies:
+    chalk "^2.0.1"
+    diff "^3.2.0"
+    jest-get-type "^22.1.0"
+    pretty-format "^23.0.0"
+
 jest-docblock@^22.4.3:
   version "22.4.3"
   resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-22.4.3.tgz#50886f132b42b280c903c592373bb6e93bb68b19"
@@ -3826,7 +3853,7 @@ jest-environment-node@^22.4.3:
     jest-mock "^22.4.3"
     jest-util "^22.4.3"
 
-jest-get-type@^22.4.3:
+jest-get-type@^22.1.0, jest-get-type@^22.4.3:
   version "22.4.3"
   resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-22.4.3.tgz#e3a8504d8479342dd4420236b322869f18900ce4"
 
@@ -5354,6 +5381,13 @@ pretty-format@^22.4.3:
     ansi-regex "^3.0.0"
     ansi-styles "^3.2.0"
 
+pretty-format@^23.0.0:
+  version "23.0.0"
+  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-23.0.0.tgz#b66dc584a0907b1969783c4c20e4d1180b18ac75"
+  dependencies:
+    ansi-regex "^3.0.0"
+    ansi-styles "^3.2.0"
+
 pretty-quick@^1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/pretty-quick/-/pretty-quick-1.4.1.tgz#9d41f778d2d4d940ec603d1293a0998e84c4722c"
@@ -5917,25 +5951,26 @@ rollup-plugin-replace@^2.0.0:
     minimatch "^3.0.2"
     rollup-pluginutils "^2.0.1"
 
-rollup-plugin-size-snapshot@^0.4.0:
-  version "0.4.0"
-  resolved "https://registry.yarnpkg.com/rollup-plugin-size-snapshot/-/rollup-plugin-size-snapshot-0.4.0.tgz#59cf69ceaae595d36f5bb60a702a58824a567e03"
+rollup-plugin-size-snapshot@^0.5.1:
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-size-snapshot/-/rollup-plugin-size-snapshot-0.5.1.tgz#f7649a4768448f35b5f97d37989e9f2c70165782"
   dependencies:
+    acorn "^5.5.3"
     bytes "^3.0.0"
     chalk "^2.3.2"
-    fast-deep-equal "^1.1.0"
     gzip-size "^4.1.0"
-    jest-diff "^22.4.0"
+    jest-diff "^23.0.0"
     memory-fs "^0.4.1"
     rollup-plugin-replace "^2.0.0"
-    uglify-es "^3.3.9"
+    terser "^3.7.5"
     webpack "^4.5.0"
 
-rollup-plugin-uglify@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/rollup-plugin-uglify/-/rollup-plugin-uglify-3.0.0.tgz#a34eca24617709c6bf1778e9653baafa06099b86"
+rollup-plugin-uglify@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-uglify/-/rollup-plugin-uglify-4.0.0.tgz#6eb471738f1ce9ba7d9d4bc43b71cba02417c8fb"
   dependencies:
-    uglify-es "^3.3.7"
+    "@babel/code-frame" "^7.0.0-beta.47"
+    uglify-js "^3.3.25"
 
 rollup-pluginutils@^1.5.0:
   version "1.5.2"
@@ -5951,11 +5986,11 @@ rollup-pluginutils@^2.0.1:
     estree-walker "^0.3.0"
     micromatch "^2.3.11"
 
-rollup@^0.58.2:
-  version "0.58.2"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-0.58.2.tgz#2feddea8c0c022f3e74b35c48e3c21b3433803ce"
+rollup@^0.59.3:
+  version "0.59.3"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-0.59.3.tgz#15dae74cb1b6a6b39a63c7096c1d6f47d8f2a5bd"
   dependencies:
-    "@types/estree" "0.0.38"
+    "@types/estree" "0.0.39"
     "@types/node" "*"
 
 rst-selector-parser@^2.2.3:
@@ -6555,6 +6590,13 @@ tar@^2.2.1:
     fstream "^1.0.2"
     inherits "2"
 
+terser@^3.7.5:
+  version "3.7.5"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-3.7.5.tgz#b18090210794c79a5774bc1f0ebe80fb877a31bd"
+  dependencies:
+    commander "~2.14.1"
+    source-map "~0.6.1"
+
 test-exclude@^4.1.1:
   version "4.2.1"
   resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-4.2.1.tgz#dfa222f03480bca69207ca728b37d74b45f724fa"
@@ -6710,7 +6752,7 @@ ua-parser-js@^0.7.9:
   version "0.7.17"
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.17.tgz#e9ec5f9498b9ec910e7ae3ac626a805c4d09ecac"
 
-uglify-es@^3.2.1, uglify-es@^3.3.4, uglify-es@^3.3.7, uglify-es@^3.3.9:
+uglify-es@^3.2.1, uglify-es@^3.3.4:
   version "3.3.9"
   resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.3.9.tgz#0c1c4f0700bed8dbc124cdb304d2592ca203e677"
   dependencies:
@@ -6733,6 +6775,13 @@ uglify-js@^3.3.14:
     commander "~2.15.0"
     source-map "~0.6.1"
 
+uglify-js@^3.3.25:
+  version "3.3.27"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.3.27.tgz#eb8c3c9429969f86ff5b0a2422ffc78c3cea8cc0"
+  dependencies:
+    commander "~2.15.0"
+    source-map "~0.6.1"
+
 uglify-to-browserify@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz#6e0924d6bda6b5afe349e39a6d632850a0f882b7"