Changelog

v1.6.1 (2017-10-17)

🐛 Bug Fix

• Update compat table to fix two small issues (#445) (@danez)

ES2015 destructuring is not fully supported in Edge 15 and the polyfill required again. es6.math.imul is supported on Android as of version 4.4

• Add polyfills for ES6 static Object methods (#441) (@danez)

Functions such as Object.keys, Object.freeze, ... do already exist in ES5, but their behaviour changed in ES2015. babel-preset-env with builtIns: true now adds the core-js polyfills for this methods if the browser only supports the ES5 variant of the method (like IE11 for example)

• Normalize module format of plugins/built-ins data (#376) (@rtsao)

v1.6.0 (2017-07-04)

🚀 New Feature

• Bump compat-table for node8 support (#363) (@existentialism)

We updated our mappings to support native trailing function commas and string paddings in Node.js 8+.

🐛 Bug Fix

• Handle chromeandroid browserslist value (#367) (@yavorsky)

We added support for using browserslist's chromeandroid in targets.

📝 Documentation

• Tweak uglify option docs (#368) (@existentialism)

Thanks to @graingert and @pfiaux for pointing out some needed updates to the uglify-js-related docs.

v1.5.2 (2017-06-07)

🐛 Bug Fix

• Ensure explicit targets always override browsers key targets (#346) (@existentialism)

browser targets should be overridden by explicit targets, and we inadvertently broke this when we landed string version support.

v1.5.1 (2017-05-22)

🐛 Bug Fix

• Compile with loose mode (#322) (@existentialism)

v1.5.0 (2017-05-19)

🚀 New Feature

• Support target versions as strings (#321) (@existentialism)

We were originally waiting on 2.x for a breaking change, but since node v7.10 and other targets are causing some pain, we decided to land a backwards compatible version.

🏠 Internal

• Backport: use preset-env and remove flow-strip-types (#324) (@yavorsky)
• Bump electron-to-chromium (#329) (@existentialism)
• Tweak version mappings to match compat-table updates (#323) (@existentialism)
• Bump browserslist (#319) (@existentialism)
• Bump compat-table (#307) (@existentialism)
• Add debug-fixtures and test/tmp to .eslintignore (#305) (@yavorsky)

v1.4.0 (2017-04-14)

🚀 New Feature

• Support spec option (#98) (@Kovensky)

Added an option to enable more spec compliant, but potentially slower, transformations for any plugins in this preset that support them.

• Bump compat-table for Edge 15 support (#273) (@existentialism)

We updated our mappings so that you can get native support for async/await and other goodies when targeting Edge 15!

🐛 Bug Fix

• Add Android browser to name map (#270) (@existentialism)

Fixed a bug that was ignoring Android targets in browserslist queries (for example: "Android >= 4").

📝 Documentation

• Clarify note about loading polyfills only once (#282) (@darahak)
• Add a reminder about include/exclude options (#275) (@existentialism)

🏠 Internal

• Chore: reduce package size. (#281) (@evilebottnawi)
• Remove deprecated comment (#271) (@yavorsky)

v1.3.3 (2017-04-07)

🐛 Bug Fix

• Support electron version in a string format (#252) (@yavorsky)

Adding electron as a target was an inadvertent breaking change as it no longer allowed string versions. We added an exception for now, even though it is inconsistent with other versions. Just as a note, the upcoming version 2.x will allow both number and string versions.

• Ensure const-check plugin order (#257) (@existentialism)

We now force the const-es2015-check plugin to run first (so that it can correctly report issues before they get transpiled away).

🚀 New Feature

• Allow use babel-plugin- prefix for include and exclude (#242) (@yavorsky)

The include and exclude options now allow both prefixed (babel-plugin-transform-es2015-spread) and prefix-less (transform-es2015-spread) plugin names.

📝 Documentation

• Note babel plugin prefix handling in include/exclude (#245) (@existentialism)
• Fix README: debug option shows info in stdout. (#236) (@Gerhut)

🏠 Internal

• Add simple smoke-test (#240) (@existentialism)
• Add prepublish script (@existentialism)

v1.3.2 (2017-03-30)

• Fixed an issue with a broken publish

v1.3.1 (2017-03-30)

• Fixed a regression with missing files due to .npmignore.

v1.3.0 (2017-03-30)

🐛 Bug Fix

• Add check for ArrayBufferSymbol.species (@existentialism)

We now properly check for Symbol.species support in ArrayBuffer and include the polyfill if necessary. This should, as a side effect, fix ArrayBuffer-related errors on IE9.

💅 Polish

• Fill data with electron as a target. (#229) (@yavorsky)

We've simplified things by adding electron as a target instead of doing a bunch of things at runtime. Electron targets should now also be displayed in the debug output.

• separate default builtins for platforms (#226) (@restrry)

If you are targeting the node environment exclusively, the always-included web polyfills (like dom.iterable, and a few others) will now no longer be included.

📝 Documentation

• remove deprecated projects (#223) skip ci

🏠 Internal

• npmignore: Add related to build data and codecov. (#216) (@yavorsky)

v1.2.2 (2017-03-14)

🐛 Bug Fix

• Refactor browser data parsing to handle families (#208) (@existentialism)

When parsing plugin data, we weren't properly handling browser families. This caused transform-es2015-block-scoping and other plugins to be incorrectly added for Edge >= 12. (s/o to @mgol for the the report and review!)

• Add typed array methods to built-ins features. (#198) (@yavorsky)

Fixes an issue where some TypedArray features were not being polyfilled properly. (s/o to @alippai for the report!)

📝 Documentation

• Fixed minor typo in readme (#199) (@bl4ckdu5t)
• Add built-ins, better links, compat-table url, etc (#195) (@yavorsky)
• Change CONTRIBUTING.md to use absolute paths (#194) (@aaronang)

🏠 Internal

• Bump plugins (#201) (@yavorsky)
• Enable code coverage (#200) (@alxpy)
• Increase mocha timeout to 10s (#202) (@yavorsky)

v1.2.1 (2017-03-06)

🐛 Bug Fix

• Add transform-duplicate-keys mapping (#192) (@existentialism)

Our plugin data was missing a mapping for the transform-duplicate-keys plugin which caused it to never be included. (s/o to @Timer for the report!)

📝 Documentation

• Clarify reasons for the uglify option in README.md (#188) (@mikegreiling)

v1.2.0 (2017-03-03)

🚀 New Feature

• Add uglify as a target (#178) (@yavorsky)

Support for uglify as a target is now available! This will enable all plugins and, as a result, fully compiles your code to ES5. Note, that useBuiltIns will work as before, and only the polyfills that your other target(s) need will be included.

{
  "presets": [
    ["env", {
      "targets": {
        "chrome": 55,
        "uglify": true
      },
      "useBuiltIns": true,
      "modules": false
    }]
  ]
}

🐛 Bug Fix

• Respect older versions in invert equals map (#180) (@danez)

Fixes a number of bugs that caused some incorrect and/or missing environment data when parsing compat-table.

v1.1.11 (2017-03-01)

This release primarily upgrades compat-table, which adds support for async on Node 7.6!

🐛 Bug Fix

• Fix hasBeenWarned condition. (#175) (@yavorsky)

📝 Documentation

• Add yarn example. (#174) (@yavorsky)

🏠 Internal

• Bump compat-table (#177) (@existentialism)
• Add electron version exception test (#176) (@existentialism)

v1.1.10 (2017-02-24)

🐛 Bug Fix

• Drop use of lodash/intersection from checkDuplicateIncludeExcludes (#173) (@existentialism)

v1.1.9 (2017-02-24)

🐛 Bug Fix

• Add tests for debug output (#156) (@existentialism)

Since we've (mostly @yavorsky) have fixed a number of bugs recently with the debug option output, we added the ability to assert stdout matches what we expect. Read the updated CONTRIBUTING.md for more info.

• Fixes #143. Log correct targets. (#155) (@yavorsky)

This fixes a bug in the debug output where incorrect target(s) were being displayed for why a particular plugin/preset was being included.

Given targets:

{
  "firefox": 52,
  "node": 7.4
}

Before:

Using plugins:
  transform-es2015-destructuring {"node":6.5}
  transform-es2015-for-of {"node":6.5}
  transform-es2015-function-name {"node":6.5}
  transform-es2015-literals {"node":4}
  transform-exponentiation-operator {"firefox":52}
  syntax-trailing-function-commas {"firefox":52}

After:

Using plugins:
  transform-es2015-destructuring {"firefox":52}
  transform-es2015-for-of {"firefox":52}
  transform-es2015-function-name {"firefox":52}
  transform-es2015-literals {"firefox":52}
  transform-exponentiation-operator {"node":7.4}
  syntax-trailing-function-commas {"node":7.4}

📝 Documentation

• Fix compat-table link in contributing.md (@existentialism)
• Update README examples to fix website (#151) (@existentialism)
• Fix few typos (#146) (@existentialism)
• Add configuration example to clarify debug: true (#138) (@yavorsky)
• Fix CHANGELOG’s v1.1.8 updates typo. (#136) (@yavorsky)
• README: Update debug: true example. (#138) (@yavorsky)

🏠 Internal

• update compat (#169) (@hzoo)
• Use external Electron to Chromium library (#144) (@Kilian)
• Update yarn lockfile (#152) (@existentialism)
• Extract option normalization into independant file (#125) (@baer)
• Update yarnfile (#145) (@baer)
• devDeps: eslint-config-babel v5.0.0 (#139) (@kaicataldo)
• Update compat-table, build data (#135) (@hzoo)

v1.1.8 (2017-01-10)

🐛 Bug Fix

• Debug: Transformations before logs. (#128) (@yavorsky)

Makes sure that all transformations on targets (such as exclude/include) are run before logging out with the debug option. Fixes (#127).

🏠 Internal

• Remove unnecessary extension. (#131) (@roman-yakobnyuk)
• Include yarn.lock and update CI. (#124) (@existentialism)

v1.1.7 (2017-01-09)

Had a publishing issue in the previous release.

v1.1.6 (2017-01-06)

🐛 Bug Fix

• Explicitly resolve lowest browser version. (#121) (@brokenmass)

{
  "targets": {
    "browsers": ["ios >= 6"] // was resolving to {ios: 10} rather than {ios: 6}
  }
}

v1.1.5 (2017-01-04)

🐛 Bug Fix

• Show error if target version is not a number. (#107) (@existentialism)

{
  "presets": [
    ["env", {
      "targets": {
        "chrome": "52", // will error since it's not a number,
        "chrome": 52 // correct!
      }
    }]
  ]
}

• Fix targets for the debug option. (#109) (@yavorsky)

Now it prints the transformed targets/environments rather than the browsers query.

Using targets:
{
  "chrome": 53,
  "ie": 10,
  "node": 6
}

Modules transform: false

Using plugins:
  transform-es2015-arrow-functions {"chrome":47,"node":6}
  transform-es2015-block-scoped-functions {"chrome":41,"ie":11,"node":4}

Using polyfills:
  es6.typed.uint8-clamped-array {"chrome":5,"node":0.12}
  es6.map {"chrome":51,"node":6.5}

v1.1.4 (2016-12-16)

v1.1.2-v1.1.4

🐛 Bug Fix

The new exclude/include options weren't working correctly for built-ins. (#102).

Also fixes an issue with debug option.

v1.1.1 (2016-12-13)

🐛 Bug Fix

Regression with the previous release due to using Object.values (ES2017). This wasn't caught because we are using babel-register to run tests and includes polyfills so it didn't fail on CI even though we have Node 0.10 as an env. Looking into fixing this to prevent future issues.

v1.1.0 (2016-12-13)

🚀 New Feature

• Add exclude option, rename whitelist to include (#89) (@hzoo)

Example:

{
  "presets": [
    ["env", {
      "targets": {
        "browsers": ["last 2 versions", "safari >= 7"]
      },
      "include": ["transform-es2015-arrow-functions"],
      "exclude": [
        "transform-regenerator",
        "transform-async-to-generator",
        "map"
      ],
      "useBuiltIns": true
    }]
  ]
}

"exclude": ["transform-regenerator"] doesn't transform generators and removes regeneratorRuntime from being imported.

"exclude": ["transform-async-to-generator"] doesn't use the built-in async-to-gen transform so you can use something like fast-async.

"exclude": ["map"] doesn't include the Map polyfill if you know you aren't using it in your code (w/ useBuiltIns). (We will figure out a way to automatically do this #84).

If you pass a wrong plugin it will error: valid options for include/exclude are in /data/plugin-features.js and /data/built-in-features.js (without the es6.)

🏠 Internal

• Optimize result filtration. (#77) (@yavorsky)
• Update eslint config to align with other babel projects (#79) (@baer)
• Update pathnames to avoid uppercase (#80) (@baer)
• Refactor build data for clarity/consistency (#81) (@baer)
• Update linting rules to cover all js (#82) (@baer)
• Cleanup lib before rebuilding (#87) (@baer)
• Move linting dependency to be dev only (#88) (@baer)

📝 Documentation

• Fix typo (#78) (@rohmanhm)
• Fix PR link in changelog. (#75) (@nhajidin)

v1.0.2 (2016-12-10)

🐛 Bug Fix

• Fix issue with Object.getOwnPropertySymbols (#71) (@existentialism)

Was requiring the wrong module kinda of like in v1.0.1:

https://github.com/zloirock/core-js#ecmascript-6-symbol

-import "core-js/modules/es6.object.get-own-property-symbols";

The test is just a part of Symbol.

v1.0.1 (2016-12-10)

🐛 Bug Fix

• Fix regenerator import (#68) (@hzoo)

We were outputting an invalid path for regenerator!

+import "regenerator-runtime/runtime";
-import "core-js/modules/regenerator-runtime/runtime"-

v1.0.0 (2016-12-09)

🚀 New Feature

• Add useBuiltIns option (#56) (@hzoo), (@yavorsky), (@existentialism)

A way to apply babel-preset-env for polyfills (via "babel-polyfill"`).

This option will apply a new Babel plugin that replaces require("babel-polyfill") with the individual requires for babel-polyfill based on the target environments.

Install

npm install babel-polyfill --save

In

import "babel-polyfill"; // create an entry js file that contains this
// or
import "core-js";

Out (different based on environment)

// chrome 55
import "core-js/modules/es7.string.pad-start"; // haha left_pad
import "core-js/modules/es7.string.pad-end";
import "core-js/modules/web.timers";
import "core-js/modules/web.immediate";
import "core-js/modules/web.dom.iterable";

.babelrc Usage

{
  "presets": [
    ["env", {
      "targets": {
        "electron": 1.4
      },
      "modules": false, // webpack 2
      "useBuiltIns": true // new option
    }]
  ]
}

Also looking to make an easier integration point via Webpack with this method. Please reach out if you have ideas!

---

• Support Electron (#55) (@paulcbetts)

Electron is also an environment, so Paul went ahead and added support for this!

.babelrc Usage

{
  "presets": [ ["env", {"targets": { "electron": 1.4 }}]]
}

Currently we are manually updating the data in /data/electron-to-chromium.js, but @kevinsawicki says we could generate the data from atom-shell/dist/index.json as well! (Someone should make a PR 😄)

v0.0.9 (2016-11-24)

🚀 New Feature

• Support Opera (#48) (Henry Zhu)

Was as simple as modifying the chrome version and subtracting 13! (so chrome 54 = opera 41)

{
  "presets": [
    ["env", {
      "targets": {
        "opera": 41
      }
    }]
  ]
}

v0.0.8 (2016-11-16)

💅 Polish

• Only print the debug info once (#46 (Henry Zhu)

When using the debug option it was printing the data for each file processed rather than once.

{
  "presets": [
    ["env", {
      "debug": true
    }]
  ]
}

v0.0.7 (2016-11-02)

🚀 New Feature

• hardcode a current node version option (#35) (Henry Zhu)

{
  "presets": [
    ["env", {
      "targets": {
        "node": "current" // parseFloat(process.versions.node)
      }
    }]
  ]
}

• add 'whitelist' option (#31) (Henry Zhu)

 {
  "presets": [
    ["env", {
      "targets": {
        "chrome": 52
      },
      "whitelist": ["transform-es2015-arrow-functions"]
    }]
  ]
}

• Add more aliases (Henry Zhu)
• Update plugin data: firefox 52 supports async/await! (#29) (Henry Zhu)

🐛 Bug Fixes

• Use compat-table equals option (#36) (Henry Zhu)

Compute and use compat-table equivalents

{
  "safari6": "phantom",
  "chrome44": "iojs",
  "chrome50": "node64",
  "chrome51": "node65",
  "chrome54": "node7",
  "chrome30": "android44",
  "chrome37": "android50",
  "chrome39": "android51",
  "safari7": "ios7",
  "safari71_8": "ios8",
  "safari9": "ios9",
  "safari10": "ios10",
  "chrome50": "node6"
}

• Change default behavior to act the same as babel-preset-latest (#33) (Henry Zhu)

{ "presets": ["env"] } // should act the same as babel-preset-latest

Internal

• Add fixture helper for tests (#28) (Henry Zhu)