Add stage-3 plugin option (#384)

experimental/babel-preset-env/data/built-in-features.js

@@ -1,5 +1,3 @@
-// https://github.com/zloirock/core-js
-
 const typedArrayMethods = [
   "typed arrays / %TypedArray%.from",
   "typed arrays / %TypedArray%.of",
@@ -80,7 +78,18 @@ const es2015 = {
   "es6.reflect.set": "Reflect / Reflect.set",
   "es6.reflect.set-prototype-of": "Reflect / Reflect.setPrototypeOf",
 
-  "es6.promise": "Promise",
+  "es6.promise": {
+    features: [
+      "Promise / basic functionality",
+      "Promise / constructor requires new",
+      "Promise / Promise.prototype isn\'t an instance",
+      "Promise / Promise.all",
+      "Promise / Promise.all, generic iterables",
+      "Promise / Promise.race",
+      "Promise / Promise.race, generic iterables",
+      "Promise / Promise[Symbol.species]"
+    ]
+  },
 
   "es6.symbol": {
     features: [
@@ -178,4 +187,6 @@ const es2017 = {
   "es7.string.pad-end": "String padding / String.prototype.padEnd",
 };
 
-module.exports = Object.assign({}, es2015, es2016, es2017);
+const stage3 = require("./stage3").builtIns;
+
+module.exports = Object.assign({}, es2015, es2016, es2017, stage3);

experimental/babel-preset-env/data/built-ins.json

@@ -164,7 +164,7 @@
   "es6.reflect.construct": {
     "chrome": "49",
     "edge": "13",
-    "firefox": "45",
+    "firefox": "44",
     "safari": "10",
     "node": "6",
     "ios": "10",
@@ -691,6 +691,7 @@
     "firefox": "23",
     "safari": "7",
     "node": "0.12",
+    "android": "4.4",
     "ios": "7",
     "opera": "17",
     "electron": "0.2"
@@ -824,5 +825,6 @@
     "ios": "10",
     "opera": "44",
     "electron": "1.7"
-  }
+  },
+  "es7.promise.finally": {}
 }

experimental/babel-preset-env/data/plugin-features.js

@@ -135,4 +135,6 @@ const es2017 = {
   }
 };
 
-module.exports = Object.assign({}, es2015, es2016, es2017);
+const stage3 = require("./stage3").plugins;
+
+module.exports = Object.assign({}, es2015, es2016, es2017, stage3);

experimental/babel-preset-env/data/plugins.json

@@ -62,7 +62,6 @@
   },
   "transform-es2015-destructuring": {
     "chrome": "51",
-    "edge": "15",
     "firefox": "53",
     "safari": "10",
     "node": "6.5",
@@ -238,5 +237,14 @@
     "ios": "10",
     "opera": "45",
     "electron": "1.7"
-  }
+  },
+  "transform-async-generator-functions": {},
+  "transform-object-rest-spread": {
+    "chrome": "60",
+    "firefox": "55",
+    "node": "8.3",
+    "opera": "47"
+  },
+  "transform-optional-catch-binding": {},
+  "transform-unicode-property-regex": {}
 }

experimental/babel-preset-env/data/stage3.js

@@ -0,0 +1,19 @@
+const builtIns = {
+  "es7.promise.finally": "Promise.prototype.finally"
+};
+
+const plugins = {
+  "transform-async-generator-functions": "Asynchronous Iterators",
+  "transform-object-rest-spread": "object rest/spread properties",
+  "transform-optional-catch-binding": "optional catch binding",
+  "transform-unicode-property-regex": "RegExp Unicode Property Escapes",
+};
+
+const pluginSyntaxMap = new Map([
+  ["transform-async-generator-functions", "syntax-async-generators"],
+  ["transform-object-rest-spread", "syntax-object-rest-spread"],
+  ["transform-optional-catch-binding", "syntax-optional-catch-binding"],
+  ["transform-unicode-property-regex", null],
+]);
+
+module.exports = { builtIns, plugins, pluginSyntaxMap };

experimental/babel-preset-env/package.json

@@ -26,8 +26,12 @@
   },
   "dependencies": {
     "babel-plugin-check-es2015-constants": "7.0.0-beta.0",
+    "babel-plugin-syntax-async-generators": "7.0.0-beta.0",
+    "babel-plugin-syntax-object-rest-spread": "7.0.0-beta.0",
+    "babel-plugin-syntax-optional-catch-binding": "7.0.0-beta.0",
     "babel-plugin-syntax-trailing-function-commas": "7.0.0-beta.0",
     "babel-plugin-transform-async-to-generator": "7.0.0-beta.0",
+    "babel-plugin-transform-async-generator-functions": "7.0.0-beta.0",
     "babel-plugin-transform-es2015-arrow-functions": "7.0.0-beta.0",
     "babel-plugin-transform-es2015-block-scoped-functions": "7.0.0-beta.0",
     "babel-plugin-transform-es2015-block-scoping": "7.0.0-beta.0",
@@ -53,6 +57,9 @@
     "babel-plugin-transform-exponentiation-operator": "7.0.0-beta.0",
     "babel-plugin-transform-new-target": "7.0.0-beta.0",
     "babel-plugin-transform-regenerator": "7.0.0-beta.0",
+    "babel-plugin-transform-object-rest-spread": "7.0.0-beta.0",
+    "babel-plugin-transform-optional-catch-binding": "7.0.0-beta.0",
+    "babel-plugin-transform-unicode-property-regex": "^2.0.5",
     "browserslist": "^2.4.0",
     "invariant": "^2.2.2",
     "semver": "^5.3.0"
@@ -68,7 +75,7 @@
     "babel-register": "7.0.0-alpha.16",
     "chai": "^4.0.2",
     "codecov": "^2.2.0",
-    "compat-table": "kangax/compat-table#d88c80ea6dcbc7064112eb46bb020718107892f7",
+    "compat-table": "kangax/compat-table#b8477cc0f6d65c000c46213e654d19f350de9fa8",
     "eslint": "^3.17.1",
     "eslint-config-babel": "^6.0.0",
     "eslint-plugin-flowtype": "^2.33.0",

experimental/babel-preset-env/scripts/build-data.js

@@ -3,14 +3,11 @@
 const fs = require("fs");
 const path = require("path");
 
-const flatten = require("lodash/flatten");
 const flattenDeep = require("lodash/flattenDeep");
 const isEqual = require("lodash/isEqual");
 const mapValues = require("lodash/mapValues");
 const pickBy = require("lodash/pickBy");
 const electronToChromiumVersions = require("electron-to-chromium").versions;
-const pluginFeatures = require("../data/plugin-features");
-const builtInFeatures = require("../data/built-in-features");
 
 const electronToChromiumKeys = Object.keys(
   electronToChromiumVersions
@@ -36,8 +33,10 @@ const findClosestElectronVersion = targetVersion => {
 const chromiumToElectron = chromium =>
   chromiumToElectronMap[chromium] || findClosestElectronVersion(chromium);
 
-const renameTests = (tests, getName) =>
+const renameTests = (tests, getName, category) =>
-  tests.map(test => Object.assign({}, test, { name: getName(test.name) }));
+  tests.map(test =>
+    Object.assign({}, test, { name: getName(test.name), category })
+  );
 
 // The following is adapted from compat-table:
 // https://github.com/kangax/compat-table/blob/gh-pages/build.js
@@ -54,11 +53,16 @@ const byTestSuite = suite => browser => {
     : true;
 };
 
-const es6 = require("compat-table/data-es6");
+const compatSources = [
-es6.browsers = pickBy(envs, byTestSuite("es6"));
+  "es6",
-
+  "es2016plus",
-const es2016plus = require("compat-table/data-es2016plus");
+  "esnext",
-es2016plus.browsers = pickBy(envs, byTestSuite("es2016plus"));
+].reduce((result, source) => {
+  const data = require(`compat-table/data-${source}`);
+  data.browsers = pickBy(envs, byTestSuite(source));
+  result.push(data);
+  return result;
+}, []);
 
 const interpolateAllResults = (rawBrowsers, tests) => {
   const interpolateResults = res => {
@@ -111,8 +115,9 @@ const interpolateAllResults = (rawBrowsers, tests) => {
   });
 };
 
-interpolateAllResults(es6.browsers, es6.tests);
+compatSources.forEach(({ browsers, tests }) =>
-interpolateAllResults(es2016plus.browsers, es2016plus.tests);
+  interpolateAllResults(browsers, tests)
+);
 
 // End of compat-table code adaptation
 
@@ -130,44 +135,55 @@ const environments = [
 ];
 
 const compatibilityTests = flattenDeep(
-  [es6, es2016plus].map(data =>
+  compatSources.map(data =>
     data.tests.map(test => {
       return test.subtests
-        ? [test, renameTests(test.subtests, name => test.name + " / " + name)]
+        ? [
+            test,
+            renameTests(
+              test.subtests,
+              name => test.name + " / " + name,
+              test.category
+            ),
+          ]
         : test;
     })
   )
 );
 
 const getLowestImplementedVersion = ({ features }, env) => {
-  const tests = flatten(
+  const tests = compatibilityTests
-    compatibilityTests
+    .filter(test => {
-      .filter(test => {
+      return (
-        return (
+        features.indexOf(test.name) >= 0 ||
-          features.indexOf(test.name) >= 0 ||
+        // for features === ["DataView"]
-          // for features === ["DataView"]
+        // it covers "DataView (Int8)" and "DataView (UInt8)"
-          // it covers "DataView (Int8)" and "DataView (UInt8)"
+        (features.length === 1 && test.name.indexOf(features[0]) === 0)
-          (features.length === 1 && test.name.indexOf(features[0]) === 0)
+      );
-        );
+    })
-      })
+    .reduce((result, test) => {
-      .map(test => {
+      const isBuiltIn =
-        const isBuiltIn =
+        test.category === "built-ins" ||
-          test.category === "built-ins" ||
+        test.category === "built-in extensions";
-          test.category === "built-in extensions";
 
-        return test.subtests
+      if (!test.subtests) {
-          ? test.subtests.map(subtest => ({
+        result.push({
-              name: `${test.name}/${subtest.name}`,
+          name: test.name,
-              res: subtest.res,
+          res: test.res,
-              isBuiltIn,
+          isBuiltIn,
-            }))
+        });
-          : {
+      } else {
-              name: test.name,
+        test.subtests.forEach(subtest =>
-              res: test.res,
+          result.push({
-              isBuiltIn,
+            name: `${test.name}/${subtest.name}`,
-            };
+            res: subtest.res,
-      })
+            isBuiltIn,
-  );
+          })
+        );
+      }
+
+      return result;
+    }, []);
 
   const envTests = tests.map(({ res: test, name, isBuiltIn }, i) => {
     // Babel itself doesn't implement the feature correctly,
@@ -221,6 +237,7 @@ const generateData = (environments, features) => {
 
     environments.forEach(env => {
       const version = getLowestImplementedVersion(options, env);
+
       if (version !== null) {
         plugin[env] = version.toString();
       }
@@ -245,36 +262,26 @@ const generateData = (environments, features) => {
   });
 };
 
-const pluginsDataPath = path.join(__dirname, "../data/plugins.json");
+["plugin", "built-in"].forEach(target => {
-const builtInsDataPath = path.join(__dirname, "../data/built-ins.json");
+  const newData = generateData(
+    environments,
+    require(`../data/${target}-features`)
+  );
+  const dataPath = path.join(__dirname, `../data/${target}s.json`);
 
-const newPluginData = generateData(environments, pluginFeatures);
+  if (process.argv[2] === "--check") {
-const newBuiltInsData = generateData(environments, builtInFeatures);
+    const currentData = require(dataPath);
 
-if (process.argv[2] === "--check") {
+    if (!isEqual(currentData, newData)) {
-  const currentPluginData = require(pluginsDataPath);
+      console.error(
-  const currentBuiltInsData = require(builtInsDataPath);
+        "The newly generated plugin/built-in data does not match the current " +
+          "files. Re-run `npm run build-data`."
+      );
+      process.exit(1);
+    }
 
-  if (
+    process.exit(0);
-    !isEqual(currentPluginData, newPluginData) ||
-    !isEqual(currentBuiltInsData, newBuiltInsData)
-  ) {
-    console.error(
-      "The newly generated plugin/built-in data does not match the current " +
-        "files. Re-run `npm run build-data`."
-    );
-    process.exit(1);
   }
 
-  process.exit(0);
+  fs.writeFileSync(dataPath, `${JSON.stringify(newData, null, 2)}\n`);
-}
+});
-
-fs.writeFileSync(
-  pluginsDataPath,
-  JSON.stringify(newPluginData, null, 2) + "\n"
-);
-
-fs.writeFileSync(
-  builtInsDataPath,
-  JSON.stringify(newBuiltInsData, null, 2) + "\n"
-);

experimental/babel-preset-env/src/available-plugins.js

@@ -1,7 +1,11 @@
 export default {
   "check-es2015-constants": require("babel-plugin-check-es2015-constants"),
+  "syntax-async-generators": require("babel-plugin-syntax-async-generators"),
+  "syntax-object-rest-spread": require("babel-plugin-syntax-object-rest-spread"),
+  "syntax-optional-catch-binding": require("babel-plugin-syntax-optional-catch-binding"),
   "syntax-trailing-function-commas": require("babel-plugin-syntax-trailing-function-commas"),
   "transform-async-to-generator": require("babel-plugin-transform-async-to-generator"),
+  "transform-async-generator-functions": require("babel-plugin-transform-async-generator-functions"),
   "transform-es2015-arrow-functions": require("babel-plugin-transform-es2015-arrow-functions"),
   "transform-es2015-block-scoped-functions": require("babel-plugin-transform-es2015-block-scoped-functions"),
   "transform-es2015-block-scoping": require("babel-plugin-transform-es2015-block-scoping"),
@@ -26,5 +30,8 @@ export default {
   "transform-es2015-unicode-regex": require("babel-plugin-transform-es2015-unicode-regex"),
   "transform-exponentiation-operator": require("babel-plugin-transform-exponentiation-operator"),
   "transform-new-target": require("babel-plugin-transform-new-target"),
+  "transform-object-rest-spread": require("babel-plugin-transform-object-rest-spread"),
+  "transform-optional-catch-binding": require("babel-plugin-transform-optional-catch-binding"),
   "transform-regenerator": require("babel-plugin-transform-regenerator"),
+  "transform-unicode-property-regex": require("babel-plugin-transform-unicode-property-regex"),
 };

experimental/babel-preset-env/src/index.js

@@ -7,13 +7,36 @@ import { defaultWebIncludes } from "./default-includes";
 import moduleTransformations from "./module-transformations";
 import normalizeOptions from "./normalize-options.js";
 import pluginList from "../data/plugins.json";
+import {
+  builtIns as stage3BuiltIns,
+  plugins as stage3Plugins,
+  pluginSyntaxMap,
+} from "../data/stage3.js";
 import useBuiltInsEntryPlugin from "./use-built-ins-entry-plugin";
 import addUsedBuiltInsPlugin from "./use-built-ins-plugin";
 import getTargets from "./targets-parser";
 import availablePlugins from "./available-plugins";
-import { prettifyTargets, semverify } from "./utils";
+import { filterStageFromList, prettifyTargets, semverify } from "./utils";
 import type { Plugin, Targets } from "./types";
 
+const getPlugin = (pluginName: string) => {
+  const plugin = availablePlugins[pluginName];
+
+  if (!plugin) {
+    throw new Error(
+      `Could not find plugin "${pluginName}". Ensure there is an entry in ./available-plugins.js for it.`,
+    );
+  }
+
+  return plugin;
+};
+
+const builtInsListWithoutStage3 = filterStageFromList(
+  builtInsList,
+  stage3BuiltIns,
+);
+const pluginListWithoutStage3 = filterStageFromList(pluginList, stage3Plugins);
+
 export const isPluginRequired = (
   supportedEnvironments: Targets,
   plugin: Targets,
@@ -84,14 +107,28 @@ const getPlatformSpecificDefaultFor = (targets: Targets): ?Array<string> => {
   return isAnyTarget || isWebTarget ? defaultWebIncludes : null;
 };
 
-const filterItems = (list, includes, excludes, targets, defaultItems) => {
+const filterItems = (
+  list,
+  includes,
+  excludes,
+  targets,
+  defaultItems,
+): Set<string> => {
   const result = new Set();
 
   for (const item in list) {
     const excluded = excludes.has(item);
 
-    if (!excluded && isPluginRequired(targets, list[item])) {
+    if (!excluded) {
-      result.add(item);
+      if (isPluginRequired(targets, list[item])) {
+        result.add(item);
+      } else {
+        const stage3Syntax = pluginSyntaxMap.get(item);
+
+        if (stage3Syntax) {
+          result.add(stage3Syntax);
+        }
+      }
     }
   }
 
@@ -118,6 +155,7 @@ export default function buildPreset(
     loose,
     modules,
     spec,
+    stage3,
     targets: optionsTargets,
     useBuiltIns,
   } = normalizeOptions(opts);
@@ -144,7 +182,7 @@ export default function buildPreset(
   const transformTargets = forceAllTransforms || hasUglifyTarget ? {} : targets;
 
   const transformations = filterItems(
-    pluginList,
+    stage3 ? pluginList : pluginListWithoutStage3,
     include.plugins,
     exclude.plugins,
     transformTargets,
@@ -157,7 +195,7 @@ export default function buildPreset(
     polyfillTargets = getBuiltInTargets(targets);
 
     polyfills = filterItems(
-      builtInsList,
+      stage3 ? builtInsList : builtInsListWithoutStage3,
       include.builtIns,
       exclude.builtIns,
       polyfillTargets,
@@ -166,15 +204,19 @@ export default function buildPreset(
   }
 
   const plugins = [];
-
+  const pluginUseBuiltIns = useBuiltIns !== false;
-  if (modules !== false && moduleTransformations[modules]) {
-    plugins.push([availablePlugins[moduleTransformations[modules]], { loose }]);
-  }
 
   // NOTE: not giving spec here yet to avoid compatibility issues when
   // babel-plugin-transform-es2015-modules-commonjs gets its spec mode
+  if (modules !== false && moduleTransformations[modules]) {
+    plugins.push([getPlugin(moduleTransformations[modules]), { loose }]);
+  }
+
   transformations.forEach(pluginName =>
-    plugins.push([availablePlugins[pluginName], { spec, loose }]),
+    plugins.push([
+      getPlugin(pluginName),
+      { spec, loose, useBuiltIns: pluginUseBuiltIns },
+    ]),
   );
 
   const regenerator = transformations.has("transform-regenerator");

experimental/babel-preset-env/src/normalize-options.js

@@ -91,15 +91,6 @@ export const validateBoolOption = (
   return value;
 };
 
-export const validateLooseOption = (looseOpt: boolean) =>
-  validateBoolOption("loose", looseOpt, false);
-
-export const validateSpecOption = (specOpt: boolean) =>
-  validateBoolOption("spec", specOpt, false);
-
-export const validateForceAllTransformsOption = (forceAllTransforms: boolean) =>
-  validateBoolOption("forceAllTransforms", forceAllTransforms, false);
-
 export const validateIgnoreBrowserslistConfig = (
   ignoreBrowserslistConfig: boolean,
 ) =>
@@ -161,16 +152,19 @@ export default function normalizeOptions(opts: Options) {
     configPath: validateConfigPathOption(opts.configPath),
     debug: opts.debug,
     exclude: validateIncludesAndExcludes(opts.exclude, "exclude"),
-    forceAllTransforms: validateForceAllTransformsOption(
+    forceAllTransforms: validateBoolOption(
+      "forceAllTransforms",
       opts.forceAllTransforms,
+      false,
     ),
     ignoreBrowserslistConfig: validateIgnoreBrowserslistConfig(
       opts.ignoreBrowserslistConfig,
     ),
     include: validateIncludesAndExcludes(opts.include, "include"),
-    loose: validateLooseOption(opts.loose),
+    loose: validateBoolOption("loose", opts.loose, false),
     modules: validateModulesOption(opts.modules),
-    spec: validateSpecOption(opts.spec),
+    spec: validateBoolOption("loose", opts.spec, false),
+    stage3: validateBoolOption("stage3", opts.stage3, false),
     targets: opts.targets,
     useBuiltIns: validateUseBuiltInsOption(opts.useBuiltIns),
   };

experimental/babel-preset-env/src/types.js

@@ -21,6 +21,7 @@ export type Options = {
   loose: boolean,
   modules: ModuleOption,
   spec: boolean,
+  stage3: boolean,
   targets: Targets,
   useBuiltIns: BuiltInsOption,
 };

experimental/babel-preset-env/src/utils.js

@@ -51,3 +51,13 @@ export const prettifyTargets = (targets: Targets): Object => {
     return results;
   }, {});
 };
+
+export const filterStageFromList = (list: any, stageList: any) => {
+  return Object.keys(list).reduce((result, item) => {
+    if (!stageList[item]) {
+      result[item] = list[item];
+    }
+
+    return result;
+  }, {});
+};

experimental/babel-preset-env/test/debug-fixtures/stage3-chrome60/in/in.js

@@ -0,0 +1 @@
+import 'babel-polyfill';

experimental/babel-preset-env/test/debug-fixtures/stage3-chrome60/options.json

@@ -0,0 +1,12 @@
+{
+  "presets": [
+    ["../../lib", {
+      "debug": true,
+      "targets": {
+        "browsers": "chrome 60"
+      },
+      "stage3": true,
+      "useBuiltIns": "entry"
+    }]
+  ]
+}

experimental/babel-preset-env/test/debug-fixtures/stage3-chrome60/stdout.txt

@@ -0,0 +1,23 @@
+babel-preset-env: `DEBUG` option
+
+Using targets:
+{
+  "chrome": "60"
+}
+
+Using modules transform: commonjs
+
+Using plugins:
+  transform-async-generator-functions { "chrome":"60" }
+  syntax-object-rest-spread { "chrome":"60" }
+  transform-optional-catch-binding { "chrome":"60" }
+  transform-unicode-property-regex { "chrome":"60" }
+
+Using polyfills with `entry` option:
+
+[src/in.js] Replaced `babel-polyfill` with the following polyfills:
+  es7.promise.finally { "chrome":"60" }
+  web.timers { "chrome":"60" }
+  web.immediate { "chrome":"60" }
+  web.dom.iterable { "chrome":"60" }
+src/in.js -> lib/in.js

experimental/babel-preset-env/test/debug-fixtures/stage3/in/in.js

@@ -0,0 +1 @@
+import 'babel-polyfill';

experimental/babel-preset-env/test/debug-fixtures/stage3/options.json

@@ -0,0 +1,9 @@
+{
+  "presets": [
+    ["../../lib", {
+      "debug": true,
+      "stage3": true,
+      "useBuiltIns": "entry"
+    }]
+  ]
+}

experimental/babel-preset-env/test/debug-fixtures/stage3/stdout.txt

@@ -0,0 +1,128 @@
+babel-preset-env: `DEBUG` option
+
+Using targets:
+{}
+
+Using modules transform: commonjs
+
+Using plugins:
+  check-es2015-constants {}
+  transform-es2015-arrow-functions {}
+  transform-es2015-block-scoped-functions {}
+  transform-es2015-block-scoping {}
+  transform-es2015-classes {}
+  transform-es2015-computed-properties {}
+  transform-es2015-destructuring {}
+  transform-es2015-duplicate-keys {}
+  transform-es2015-for-of {}
+  transform-es2015-function-name {}
+  transform-es2015-literals {}
+  transform-es2015-object-super {}
+  transform-es2015-parameters {}
+  transform-es2015-shorthand-properties {}
+  transform-es2015-spread {}
+  transform-es2015-sticky-regex {}
+  transform-es2015-template-literals {}
+  transform-es2015-typeof-symbol {}
+  transform-es2015-unicode-regex {}
+  transform-new-target {}
+  transform-regenerator {}
+  transform-exponentiation-operator {}
+  transform-async-to-generator {}
+  syntax-trailing-function-commas {}
+  transform-async-generator-functions {}
+  transform-object-rest-spread {}
+  transform-optional-catch-binding {}
+  transform-unicode-property-regex {}
+
+Using polyfills with `entry` option:
+
+[src/in.js] Replaced `babel-polyfill` with the following polyfills:
+  es6.typed.array-buffer {}
+  es6.typed.data-view {}
+  es6.typed.int8-array {}
+  es6.typed.uint8-array {}
+  es6.typed.uint8-clamped-array {}
+  es6.typed.int16-array {}
+  es6.typed.uint16-array {}
+  es6.typed.int32-array {}
+  es6.typed.uint32-array {}
+  es6.typed.float32-array {}
+  es6.typed.float64-array {}
+  es6.map {}
+  es6.set {}
+  es6.weak-map {}
+  es6.weak-set {}
+  es6.reflect.apply {}
+  es6.reflect.construct {}
+  es6.reflect.define-property {}
+  es6.reflect.delete-property {}
+  es6.reflect.get {}
+  es6.reflect.get-own-property-descriptor {}
+  es6.reflect.get-prototype-of {}
+  es6.reflect.has {}
+  es6.reflect.is-extensible {}
+  es6.reflect.own-keys {}
+  es6.reflect.prevent-extensions {}
+  es6.reflect.set {}
+  es6.reflect.set-prototype-of {}
+  es6.promise {}
+  es6.symbol {}
+  es6.object.assign {}
+  es6.object.is {}
+  es6.object.set-prototype-of {}
+  es6.function.name {}
+  es6.string.raw {}
+  es6.string.from-code-point {}
+  es6.string.code-point-at {}
+  es6.string.repeat {}
+  es6.string.starts-with {}
+  es6.string.ends-with {}
+  es6.string.includes {}
+  es6.regexp.flags {}
+  es6.regexp.match {}
+  es6.regexp.replace {}
+  es6.regexp.split {}
+  es6.regexp.search {}
+  es6.array.from {}
+  es6.array.of {}
+  es6.array.copy-within {}
+  es6.array.find {}
+  es6.array.find-index {}
+  es6.array.fill {}
+  es6.array.iterator {}
+  es6.number.is-finite {}
+  es6.number.is-integer {}
+  es6.number.is-safe-integer {}
+  es6.number.is-nan {}
+  es6.number.epsilon {}
+  es6.number.min-safe-integer {}
+  es6.number.max-safe-integer {}
+  es6.math.acosh {}
+  es6.math.asinh {}
+  es6.math.atanh {}
+  es6.math.cbrt {}
+  es6.math.clz32 {}
+  es6.math.cosh {}
+  es6.math.expm1 {}
+  es6.math.fround {}
+  es6.math.hypot {}
+  es6.math.imul {}
+  es6.math.log1p {}
+  es6.math.log10 {}
+  es6.math.log2 {}
+  es6.math.sign {}
+  es6.math.sinh {}
+  es6.math.tanh {}
+  es6.math.trunc {}
+  es7.array.includes {}
+  es7.object.values {}
+  es7.object.entries {}
+  es7.object.get-own-property-descriptors {}
+  es7.string.pad-start {}
+  es7.string.pad-end {}
+  es7.promise.finally {}
+  web.timers {}
+  web.immediate {}
+  web.dom.iterable {}
+src/in.js -> lib/in.js

experimental/babel-preset-env/test/fixtures/preset-options/stage3-use-builtins-entry/actual.js

@@ -0,0 +1,6 @@
+let { x, y, ...z } = { x: 1, y: 2, a: 3, b: 4 };
+let n = { x, y, ...z };
+async function* agf() {
+  await 1;
+  yield 2;
+}

experimental/babel-preset-env/test/fixtures/preset-options/stage3-use-builtins-entry/expected.js

@@ -0,0 +1,48 @@
+"use strict";
+
+var _asyncGenerator = function () { function AwaitValue(value) { this.value = value; } function AsyncGenerator(gen) { var front, back; function send(key, arg) { return new Promise(function (resolve, reject) { var request = { key: key, arg: arg, resolve: resolve, reject: reject, next: null }; if (back) { back = back.next = request; } else { front = back = request; resume(key, arg); } }); } function resume(key, arg) { try { var result = gen[key](arg); var value = result.value; if (value instanceof AwaitValue) { Promise.resolve(value.value).then(function (arg) { resume("next", arg); }, function (arg) { resume("throw", arg); }); } else { settle(result.done ? "return" : "normal", result.value); } } catch (err) { settle("throw", err); } } function settle(type, value) { switch (type) { case "return": front.resolve({ value: value, done: true }); break; case "throw": front.reject(value); break; default: front.resolve({ value: value, done: false }); break; } front = front.next; if (front) { resume(front.key, front.arg); } else { back = null; } } this._invoke = send; if (typeof gen.return !== "function") { this.return = undefined; } } if (typeof Symbol === "function" && Symbol.asyncIterator) { AsyncGenerator.prototype[Symbol.asyncIterator] = function () { return this; }; } AsyncGenerator.prototype.next = function (arg) { return this._invoke("next", arg); }; AsyncGenerator.prototype.throw = function (arg) { return this._invoke("throw", arg); }; AsyncGenerator.prototype.return = function (arg) { return this._invoke("return", arg); }; return { wrap: function wrap(fn) { return function () { return new AsyncGenerator(fn.apply(this, arguments)); }; }, await: function _await(value) { return new AwaitValue(value); } }; }();
+
+var agf = function () {
+  var _ref = _asyncGenerator.wrap(
+  /*#__PURE__*/
+  regeneratorRuntime.mark(function _callee() {
+    return regeneratorRuntime.wrap(function _callee$(_context) {
+      while (1) {
+        switch (_context.prev = _context.next) {
+          case 0:
+            _context.next = 2;
+            return _asyncGenerator.await(1);
+
+          case 2:
+            _context.next = 4;
+            return 2;
+
+          case 4:
+          case "end":
+            return _context.stop();
+        }
+      }
+    }, _callee, this);
+  }));
+
+  return function agf() {
+    return _ref.apply(this, arguments);
+  };
+}();
+
+function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
+
+var _x$y$a$b = {
+  x: 1,
+  y: 2,
+  a: 3,
+  b: 4
+},
+    x = _x$y$a$b.x,
+    y = _x$y$a$b.y,
+    z = _objectWithoutProperties(_x$y$a$b, ["x", "y"]);
+
+var n = Object.assign({
+  x: x,
+  y: y
+}, z);

experimental/babel-preset-env/test/fixtures/preset-options/stage3-use-builtins-entry/options.json

@@ -0,0 +1,8 @@
+{
+  "presets": [
+    ["../../../../lib", {
+      "stage3": true,
+      "useBuiltIns": "entry"
+    }]
+  ]
+}

experimental/babel-preset-env/test/fixtures/preset-options/stage3-use-builtins-usage/actual.js

@@ -0,0 +1,6 @@
+let { x, y, ...z } = { x: 1, y: 2, a: 3, b: 4 };
+let n = { x, y, ...z };
+async function* agf() {
+  await 1;
+  yield 2;
+}

experimental/babel-preset-env/test/fixtures/preset-options/stage3-use-builtins-usage/expected.js

@@ -0,0 +1,56 @@
+"use strict";
+
+var _asyncGenerator = function () { function AwaitValue(value) { this.value = value; } function AsyncGenerator(gen) { var front, back; function send(key, arg) { return new Promise(function (resolve, reject) { var request = { key: key, arg: arg, resolve: resolve, reject: reject, next: null }; if (back) { back = back.next = request; } else { front = back = request; resume(key, arg); } }); } function resume(key, arg) { try { var result = gen[key](arg); var value = result.value; if (value instanceof AwaitValue) { Promise.resolve(value.value).then(function (arg) { resume("next", arg); }, function (arg) { resume("throw", arg); }); } else { settle(result.done ? "return" : "normal", result.value); } } catch (err) { settle("throw", err); } } function settle(type, value) { switch (type) { case "return": front.resolve({ value: value, done: true }); break; case "throw": front.reject(value); break; default: front.resolve({ value: value, done: false }); break; } front = front.next; if (front) { resume(front.key, front.arg); } else { back = null; } } this._invoke = send; if (typeof gen.return !== "function") { this.return = undefined; } } if (typeof Symbol === "function" && Symbol.asyncIterator) { AsyncGenerator.prototype[Symbol.asyncIterator] = function () { return this; }; } AsyncGenerator.prototype.next = function (arg) { return this._invoke("next", arg); }; AsyncGenerator.prototype.throw = function (arg) { return this._invoke("throw", arg); }; AsyncGenerator.prototype.return = function (arg) { return this._invoke("return", arg); }; return { wrap: function wrap(fn) { return function () { return new AsyncGenerator(fn.apply(this, arguments)); }; }, await: function _await(value) { return new AwaitValue(value); } }; }();
+
+var agf = function () {
+  var _ref = _asyncGenerator.wrap(
+  /*#__PURE__*/
+  regeneratorRuntime.mark(function _callee() {
+    return regeneratorRuntime.wrap(function _callee$(_context) {
+      while (1) {
+        switch (_context.prev = _context.next) {
+          case 0:
+            _context.next = 2;
+            return _asyncGenerator.await(1);
+
+          case 2:
+            _context.next = 4;
+            return 2;
+
+          case 4:
+          case "end":
+            return _context.stop();
+        }
+      }
+    }, _callee, this);
+  }));
+
+  return function agf() {
+    return _ref.apply(this, arguments);
+  };
+}();
+
+require("babel-polyfill/lib/core-js/modules/es6.symbol");
+
+require("babel-polyfill/lib/core-js/modules/es6.promise");
+
+require("babel-polyfill/lib/regenerator-runtime/runtime");
+
+require("babel-polyfill/lib/core-js/modules/es6.object.assign");
+
+function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
+
+var _x$y$a$b = {
+  x: 1,
+  y: 2,
+  a: 3,
+  b: 4
+},
+    x = _x$y$a$b.x,
+    y = _x$y$a$b.y,
+    z = _objectWithoutProperties(_x$y$a$b, ["x", "y"]);
+
+var n = Object.assign({
+  x: x,
+  y: y
+}, z);

experimental/babel-preset-env/test/fixtures/preset-options/stage3-use-builtins-usage/options.json

@@ -0,0 +1,8 @@
+{
+  "presets": [
+    ["../../../../lib", {
+      "stage3": true,
+      "useBuiltIns": "usage"
+    }]
+  ]
+}

experimental/babel-preset-env/test/fixtures/preset-options/stage3/actual.js

@@ -0,0 +1,6 @@
+let { x, y, ...z } = { x: 1, y: 2, a: 3, b: 4 };
+let n = { x, y, ...z };
+async function* agf() {
+  await 1;
+  yield 2;
+}

experimental/babel-preset-env/test/fixtures/preset-options/stage3/expected.js

@@ -0,0 +1,50 @@
+"use strict";
+
+var _asyncGenerator = function () { function AwaitValue(value) { this.value = value; } function AsyncGenerator(gen) { var front, back; function send(key, arg) { return new Promise(function (resolve, reject) { var request = { key: key, arg: arg, resolve: resolve, reject: reject, next: null }; if (back) { back = back.next = request; } else { front = back = request; resume(key, arg); } }); } function resume(key, arg) { try { var result = gen[key](arg); var value = result.value; if (value instanceof AwaitValue) { Promise.resolve(value.value).then(function (arg) { resume("next", arg); }, function (arg) { resume("throw", arg); }); } else { settle(result.done ? "return" : "normal", result.value); } } catch (err) { settle("throw", err); } } function settle(type, value) { switch (type) { case "return": front.resolve({ value: value, done: true }); break; case "throw": front.reject(value); break; default: front.resolve({ value: value, done: false }); break; } front = front.next; if (front) { resume(front.key, front.arg); } else { back = null; } } this._invoke = send; if (typeof gen.return !== "function") { this.return = undefined; } } if (typeof Symbol === "function" && Symbol.asyncIterator) { AsyncGenerator.prototype[Symbol.asyncIterator] = function () { return this; }; } AsyncGenerator.prototype.next = function (arg) { return this._invoke("next", arg); }; AsyncGenerator.prototype.throw = function (arg) { return this._invoke("throw", arg); }; AsyncGenerator.prototype.return = function (arg) { return this._invoke("return", arg); }; return { wrap: function wrap(fn) { return function () { return new AsyncGenerator(fn.apply(this, arguments)); }; }, await: function _await(value) { return new AwaitValue(value); } }; }();
+
+var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
+
+var agf = function () {
+  var _ref = _asyncGenerator.wrap(
+  /*#__PURE__*/
+  regeneratorRuntime.mark(function _callee() {
+    return regeneratorRuntime.wrap(function _callee$(_context) {
+      while (1) {
+        switch (_context.prev = _context.next) {
+          case 0:
+            _context.next = 2;
+            return _asyncGenerator.await(1);
+
+          case 2:
+            _context.next = 4;
+            return 2;
+
+          case 4:
+          case "end":
+            return _context.stop();
+        }
+      }
+    }, _callee, this);
+  }));
+
+  return function agf() {
+    return _ref.apply(this, arguments);
+  };
+}();
+
+function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
+
+var _x$y$a$b = {
+  x: 1,
+  y: 2,
+  a: 3,
+  b: 4
+},
+    x = _x$y$a$b.x,
+    y = _x$y$a$b.y,
+    z = _objectWithoutProperties(_x$y$a$b, ["x", "y"]);
+
+var n = _extends({
+  x: x,
+  y: y
+}, z);

experimental/babel-preset-env/test/fixtures/preset-options/stage3/options.json

@@ -0,0 +1,7 @@
+{
+  "presets": [
+    ["../../../../lib", {
+      "stage3": true
+    }]
+  ]
+}

experimental/babel-preset-env/test/normalize-options.spec.js

@@ -6,11 +6,9 @@ const assert = require("assert");
 const {
   checkDuplicateIncludeExcludes,
   normalizePluginNames,
-  validateForceAllTransformsOption,
+  validateBoolOption,
   validateIncludesAndExcludes,
-  validateLooseOption,
   validateModulesOption,
-  validateSpecOption,
 } = normalizeOptions;
 
 describe("normalize-options", () => {
@@ -39,31 +37,25 @@ describe("normalize-options", () => {
     });
   });
 
-  const testBoolOption = validator => {
+  describe("validateBoolOption", () => {
-    describe(validator.name, () => {
+    it("`undefined` option returns false", () => {
-      it("`undefined` option returns false", () => {
+      assert(validateBoolOption("test", undefined, false) === false);
-        assert(validator() === false);
+    });
-      });
 
-      it("`false` option returns false", () => {
+    it("`false` option returns false", () => {
-        assert(validator(false) === false);
+      assert(validateBoolOption("test", false, false) === false);
-      });
+    });
 
-      it("`true` option returns true", () => {
+    it("`true` option returns true", () => {
-        assert(validator(true) === true);
+      assert(validateBoolOption("test", true, false) === true);
-      });
+    });
 
-      it("array option is invalid", () => {
+    it("array option is invalid", () => {
-        assert.throws(() => {
+      assert.throws(() => {
-          validateLooseOption([]);
+        validateBoolOption("test", [], false);
-        });
       });
     });
-  };
+  });
-
-  testBoolOption(validateLooseOption);
-  testBoolOption(validateSpecOption);
-  testBoolOption(validateForceAllTransformsOption);
 
   describe("checkDuplicateIncludeExcludes", function() {
     it("should throw if duplicate names in both", function() {

experimental/babel-preset-env/yarn.lock

@@ -558,6 +558,14 @@ babel-helper-regex@^6.24.1:
     babel-types "^6.24.1"
     lodash "^4.2.0"
 
+babel-helper-regex@^6.26.0:
+  version "6.26.0"
+  resolved "https://registry.yarnpkg.com/babel-helper-regex/-/babel-helper-regex-6.26.0.tgz#325c59f902f82f24b74faceed0363954f6495e72"
+  dependencies:
+    babel-runtime "^6.26.0"
+    babel-types "^6.26.0"
+    lodash "^4.17.4"
+
 babel-helper-remap-async-to-generator@7.0.0-alpha.16:
   version "7.0.0-alpha.16"
   resolved "https://registry.yarnpkg.com/babel-helper-remap-async-to-generator/-/babel-helper-remap-async-to-generator-7.0.0-alpha.16.tgz#3c68be8d7bebe6e64bfcd0d9a21553e859a5dc07"
@@ -709,6 +717,10 @@ babel-plugin-syntax-async-functions@^6.8.0:
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz#cad9cad1191b5ad634bf30ae0872391e0647be95"
 
+babel-plugin-syntax-async-generators@7.0.0-beta.0:
+  version "7.0.0-beta.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-async-generators/-/babel-plugin-syntax-async-generators-7.0.0-beta.0.tgz#a89061e968d4f4c2ee2f8a5b9c84eed19ec48488"
+
 babel-plugin-syntax-async-generators@^6.5.0:
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-async-generators/-/babel-plugin-syntax-async-generators-6.13.0.tgz#6bc963ebb16eccbae6b92b596eb7f35c342a8b9a"
@@ -757,10 +769,18 @@ babel-plugin-syntax-function-bind@^6.8.0:
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-function-bind/-/babel-plugin-syntax-function-bind-6.13.0.tgz#48c495f177bdf31a981e732f55adc0bdd2601f46"
 
+babel-plugin-syntax-object-rest-spread@7.0.0-beta.0:
+  version "7.0.0-beta.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-7.0.0-beta.0.tgz#34a1eee484acfb0a89effc364e386a8d769286eb"
+
 babel-plugin-syntax-object-rest-spread@^6.8.0:
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz#fd6536f2bce13836ffa3a5458c4903a597bb3bf5"
 
+babel-plugin-syntax-optional-catch-binding@7.0.0-beta.0:
+  version "7.0.0-beta.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-optional-catch-binding/-/babel-plugin-syntax-optional-catch-binding-7.0.0-beta.0.tgz#9c92545c42865954c544f480648e179ba15757fb"
+
 babel-plugin-syntax-trailing-function-commas@7.0.0-alpha.16:
   version "7.0.0-alpha.16"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-trailing-function-commas/-/babel-plugin-syntax-trailing-function-commas-7.0.0-alpha.16.tgz#daed195b88dcc26db401d51a58d346808b8e4585"
@@ -773,6 +793,13 @@ babel-plugin-syntax-trailing-function-commas@^6.22.0:
   version "6.22.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-trailing-function-commas/-/babel-plugin-syntax-trailing-function-commas-6.22.0.tgz#ba0360937f8d06e40180a43fe0d5616fff532cf3"
 
+babel-plugin-transform-async-generator-functions@7.0.0-beta.0:
+  version "7.0.0-beta.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-async-generator-functions/-/babel-plugin-transform-async-generator-functions-7.0.0-beta.0.tgz#df506a7b90fe7a707f8ca8f309435df6b651ccf4"
+  dependencies:
+    babel-helper-remap-async-to-generator "7.0.0-beta.0"
+    babel-plugin-syntax-async-generators "7.0.0-beta.0"
+
 babel-plugin-transform-async-generator-functions@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-async-generator-functions/-/babel-plugin-transform-async-generator-functions-6.24.1.tgz#f058900145fd3e9907a6ddf28da59f215258a5db"
@@ -1327,6 +1354,12 @@ babel-plugin-transform-new-target@7.0.0-beta.0:
   version "7.0.0-beta.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-new-target/-/babel-plugin-transform-new-target-7.0.0-beta.0.tgz#0ded2d30b0e889a2916384d4955de96ddd2c2764"
 
+babel-plugin-transform-object-rest-spread@7.0.0-beta.0:
+  version "7.0.0-beta.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-object-rest-spread/-/babel-plugin-transform-object-rest-spread-7.0.0-beta.0.tgz#51b6cabe5b55dc63d4fe0287b3df23a7691b11d4"
+  dependencies:
+    babel-plugin-syntax-object-rest-spread "7.0.0-beta.0"
+
 babel-plugin-transform-object-rest-spread@^6.22.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-object-rest-spread/-/babel-plugin-transform-object-rest-spread-6.23.0.tgz#875d6bc9be761c58a2ae3feee5dc4895d8c7f921"
@@ -1334,6 +1367,12 @@ babel-plugin-transform-object-rest-spread@^6.22.0:
     babel-plugin-syntax-object-rest-spread "^6.8.0"
     babel-runtime "^6.22.0"
 
+babel-plugin-transform-optional-catch-binding@7.0.0-beta.0:
+  version "7.0.0-beta.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-optional-catch-binding/-/babel-plugin-transform-optional-catch-binding-7.0.0-beta.0.tgz#363bcd26e133dd28ba1eb9b2680d1bf99c250294"
+  dependencies:
+    babel-plugin-syntax-optional-catch-binding "7.0.0-beta.0"
+
 babel-plugin-transform-regenerator@7.0.0-alpha.16:
   version "7.0.0-alpha.16"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-regenerator/-/babel-plugin-transform-regenerator-7.0.0-alpha.16.tgz#892ccde496b9187c8517ca01eb1e86b7636e58ea"
@@ -1371,6 +1410,13 @@ babel-plugin-transform-strict-mode@^6.24.1:
     babel-runtime "^6.22.0"
     babel-types "^6.24.1"
 
+babel-plugin-transform-unicode-property-regex@^2.0.5:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-unicode-property-regex/-/babel-plugin-transform-unicode-property-regex-2.0.5.tgz#24922190f9598384d258a6c8e7409309dc6f3898"
+  dependencies:
+    babel-helper-regex "^6.26.0"
+    regexpu-core "^4.1.3"
+
 babel-polyfill@7.0.0-alpha.16:
   version "7.0.0-alpha.16"
   resolved "https://registry.yarnpkg.com/babel-polyfill/-/babel-polyfill-7.0.0-alpha.16.tgz#3cd865f5eb18dd065916fac33aafcf4617ca2956"
@@ -1530,6 +1576,13 @@ babel-runtime@^6.18.0, babel-runtime@^6.22.0:
     core-js "^2.4.0"
     regenerator-runtime "^0.10.0"
 
+babel-runtime@^6.26.0:
+  version "6.26.0"
+  resolved "https://registry.yarnpkg.com/babel-runtime/-/babel-runtime-6.26.0.tgz#965c7058668e82b55d7bfe04ff2337bc8b5647fe"
+  dependencies:
+    core-js "^2.4.0"
+    regenerator-runtime "^0.11.0"
+
 babel-template@7.0.0-alpha.16:
   version "7.0.0-alpha.16"
   resolved "https://registry.yarnpkg.com/babel-template/-/babel-template-7.0.0-alpha.16.tgz#f8bec2b5074e150c47b415d13db231b15e45598d"
@@ -1625,6 +1678,15 @@ babel-types@^6.18.0, babel-types@^6.19.0, babel-types@^6.23.0, babel-types@^6.24
     lodash "^4.2.0"
     to-fast-properties "^1.0.1"
 
+babel-types@^6.26.0:
+  version "6.26.0"
+  resolved "https://registry.yarnpkg.com/babel-types/-/babel-types-6.26.0.tgz#a3b073f94ab49eb6fa55cd65227a334380632497"
+  dependencies:
+    babel-runtime "^6.26.0"
+    esutils "^2.0.2"
+    lodash "^4.17.4"
+    to-fast-properties "^1.0.3"
+
 babylon@7.0.0-beta.17:
   version "7.0.0-beta.17"
   resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.17.tgz#2aad4d6764f409dfb3ac216d855dc93d70d37911"
@@ -1633,14 +1695,14 @@ babylon@7.0.0-beta.22:
   version "7.0.0-beta.22"
   resolved "https://registry.yarnpkg.com/babylon/-/babylon-7.0.0-beta.22.tgz#74f0ad82ed7c7c3cfeab74cf684f815104161b65"
 
-babylon@^6.11.0, babylon@^6.17.4:
+babylon@^6.11.0, babylon@^6.15.0, babylon@^6.17.0:
-  version "6.17.4"
-  resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.17.4.tgz#3e8b7402b88d22c3423e137a1577883b15ff869a"
-
-babylon@^6.15.0, babylon@^6.17.0:
   version "6.17.0"
   resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.17.0.tgz#37da948878488b9c4e3c4038893fa3314b3fc932"
 
+babylon@^6.17.4:
+  version "6.17.4"
+  resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.17.4.tgz#3e8b7402b88d22c3423e137a1577883b15ff869a"
+
 balanced-match@^0.4.1:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
@@ -1694,7 +1756,14 @@ browser-stdout@1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.0.tgz#f351d32969d32fa5d7a5567154263d928ae3bd1f"
 
-browserslist@^2.1.2, browserslist@^2.4.0:
+browserslist@^2.1.2:
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.1.4.tgz#cc526af4a1312b7d2e05653e56d0c8ab70c0e053"
+  dependencies:
+    caniuse-lite "^1.0.30000670"
+    electron-to-chromium "^1.3.11"
+
+browserslist@^2.4.0:
   version "2.4.0"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.4.0.tgz#693ee93d01e66468a6348da5498e011f578f87f8"
   dependencies:
@@ -1739,9 +1808,13 @@ camelcase@^4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-4.1.0.tgz#d545635be1e33c542649c69173e5de6acfae34dd"
 
+caniuse-lite@^1.0.30000670:
+  version "1.0.30000676"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000676.tgz#1e962123f48073f0c51c4ea0651dd64d25786498"
+
 caniuse-lite@^1.0.30000718:
-  version "1.0.30000721"
+  version "1.0.30000733"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000721.tgz#931a21a7bd85016300328d21f126d84b73437d35"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000733.tgz#ebfc48254117cc0c66197a4536cb4397a6cfbccd"
 
 caseless@~0.11.0:
   version "0.11.0"
@@ -1957,9 +2030,9 @@ commoner@^0.10.1:
     q "^1.1.2"
     recast "^0.11.17"
 
-compat-table@kangax/compat-table#d88c80ea6dcbc7064112eb46bb020718107892f7:
+compat-table@kangax/compat-table#b8477cc0f6d65c000c46213e654d19f350de9fa8:
   version "0.0.0"
-  resolved "https://codeload.github.com/kangax/compat-table/tar.gz/d88c80ea6dcbc7064112eb46bb020718107892f7"
+  resolved "https://codeload.github.com/kangax/compat-table/tar.gz/b8477cc0f6d65c000c46213e654d19f350de9fa8"
   dependencies:
     babel-core latest
     babel-polyfill latest
@@ -2231,9 +2304,13 @@ ecc-jsbn@~0.1.1:
   dependencies:
     jsbn "~0.1.0"
 
+electron-to-chromium@^1.3.11:
+  version "1.3.13"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.13.tgz#1b3a5eace6e087bb5e257a100b0cbfe81b2891fc"
+
 electron-to-chromium@^1.3.18:
-  version "1.3.19"
+  version "1.3.21"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.19.tgz#73d97b0e8b05aa776cedf3cdce7fdc0538037675"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.21.tgz#a967ebdcfe8ed0083fc244d1894022a8e8113ea2"
 
 elegant-spinner@^1.0.1:
   version "1.0.1"
@@ -4204,14 +4281,28 @@ regenerate-unicode-properties@^5.0.6:
   dependencies:
     regenerate "^1.3.2"
 
+regenerate-unicode-properties@^5.1.1:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/regenerate-unicode-properties/-/regenerate-unicode-properties-5.1.1.tgz#f5b947b5b7514b79ce58a756659724fa9444c06b"
+  dependencies:
+    regenerate "^1.3.2"
+
 regenerate@^1.2.1, regenerate@^1.3.2, regenerate@latest:
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.3.2.tgz#d1941c67bad437e1be76433add5b385f95b19260"
 
+regenerate@^1.3.3:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.3.3.tgz#0c336d3980553d755c39b586ae3b20aa49c82b7f"
+
 regenerator-runtime@^0.10.0:
   version "0.10.5"
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.10.5.tgz#336c3efc1220adcedda2c9fab67b5a7955a33658"
 
+regenerator-runtime@^0.11.0:
+  version "0.11.0"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.0.tgz#7e54fe5b5ccd5d6624ea6255c3473be090b802e1"
+
 regenerator-transform@0.10.0:
   version "0.10.0"
   resolved "https://registry.yarnpkg.com/regenerator-transform/-/regenerator-transform-0.10.0.tgz#f9ab3eac9cc2de38431d996a6a8abf1c50f2e459"
@@ -4254,6 +4345,17 @@ regexpu-core@^4.0.2:
     unicode-match-property-ecmascript "^1.0.1"
     unicode-match-property-value-ecmascript "^1.0.0"
 
+regexpu-core@^4.1.3:
+  version "4.1.3"
+  resolved "https://registry.yarnpkg.com/regexpu-core/-/regexpu-core-4.1.3.tgz#fb81616dbbc2a917a7419b33f8379144f51eb8d0"
+  dependencies:
+    regenerate "^1.3.3"
+    regenerate-unicode-properties "^5.1.1"
+    regjsgen "^0.3.0"
+    regjsparser "^0.2.1"
+    unicode-match-property-ecmascript "^1.0.3"
+    unicode-match-property-value-ecmascript "^1.0.1"
+
 regjsgen@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/regjsgen/-/regjsgen-0.2.0.tgz#6c016adeac554f75823fe37ac05b92d5a4edb1f7"
@@ -4296,7 +4398,7 @@ replace-ext@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/replace-ext/-/replace-ext-1.0.0.tgz#de63128373fcbf7c3ccfa4de5a480c45a67958eb"
 
-request@2.79.0:
+request@2.79.0, request@^2.55.0:
   version "2.79.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.79.0.tgz#4dfe5bf6be8b8cdc37fcf93e04b65577722710de"
   dependencies:
@@ -4321,7 +4423,7 @@ request@2.79.0:
     tunnel-agent "~0.4.1"
     uuid "^3.0.0"
 
-request@^2.55.0, request@^2.81.0:
+request@^2.81.0:
   version "2.81.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.81.0.tgz#c6928946a0e06c5f8d6f8a9333469ffda46298a0"
   dependencies:
@@ -4784,7 +4886,7 @@ through@^2.3.6:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
 
-to-fast-properties@^1.0.1:
+to-fast-properties@^1.0.1, to-fast-properties@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-1.0.3.tgz#b83571fa4d8c25b82e231b06e3a3055de4ca1a47"
 
@@ -4881,6 +4983,10 @@ unicode-canonical-property-names-ecmascript@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unicode-canonical-property-names-ecmascript/-/unicode-canonical-property-names-ecmascript-1.0.0.tgz#20068aef4ada99ea2a80bf3ff8299a4db3e5bed0"
 
+unicode-canonical-property-names-ecmascript@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/unicode-canonical-property-names-ecmascript/-/unicode-canonical-property-names-ecmascript-1.0.2.tgz#08ef9ec454392fc5ed99b08a70524ae3881c0306"
+
 unicode-match-property-ecmascript@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/unicode-match-property-ecmascript/-/unicode-match-property-ecmascript-1.0.1.tgz#f380567fb895cc649828bea3a524fa34f4feb9da"
@@ -4888,14 +4994,29 @@ unicode-match-property-ecmascript@^1.0.1:
     unicode-canonical-property-names-ecmascript "^1.0.0"
     unicode-property-aliases-ecmascript "^1.0.1"
 
+unicode-match-property-ecmascript@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/unicode-match-property-ecmascript/-/unicode-match-property-ecmascript-1.0.3.tgz#db9b1cb4ffc67e0c5583780b1b59370e4cbe97b9"
+  dependencies:
+    unicode-canonical-property-names-ecmascript "^1.0.2"
+    unicode-property-aliases-ecmascript "^1.0.3"
+
 unicode-match-property-value-ecmascript@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-1.0.0.tgz#393fa3e8baf4de2c415b95a8d7338587e3e563be"
 
+unicode-match-property-value-ecmascript@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-1.0.1.tgz#fea059120a016f403afd3bf586162b4db03e0604"
+
 unicode-property-aliases-ecmascript@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-1.0.2.tgz#b495f544c79c2a85cf3083c907c884ef154be1a0"
 
+unicode-property-aliases-ecmascript@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-1.0.3.tgz#ac3522583b9e630580f916635333e00c5ead690d"
+
 universalify@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/universalify/-/universalify-0.1.0.tgz#9eb1c4651debcc670cc94f1a75762332bb967778"