From 890fc031ac9def3667c70f3cd64edb664fc954db Mon Sep 17 00:00:00 2001
From: Jayden Seric <me@jaydenseric.com>
Date: Wed, 2 May 2018 23:48:53 +1000
Subject: [PATCH 1/5] Support native ESM via .mjs.

Relates to https://github.com/graphql/express-graphql/issues/425.

- Swapped deprecated babel-preset-es2015 for babel-preset-env.
- Added package.json engines field.
- Configured babel-preset-env to target the Node.js version defined in package.json engines field.
- Kept Babel at v6, but moved config into a v7 ready .babelrc.js file for dynamic config via env.
- Tidied the package.json scripts, added an ESM build step that generates .mjs dist files. Follow the lead of https://github.com/graphql/graphql-js/pull/1244, although I do things quite different for my own projects with Babel v7.
- Updated package.json main field for ESM/CJS cross compatibility.
- Added a package.json module field for tree-shaking bundlers.
---
 .babelrc.js  |  15 ++++++
 package.json |  21 ++++----
 yarn.lock    | 147 +++++++++++++++++++++++++++++++++++----------------
 3 files changed, 129 insertions(+), 54 deletions(-)
 create mode 100644 .babelrc.js

diff --git a/.babelrc.js b/.babelrc.js
new file mode 100644
index 00000000..574e4773
--- /dev/null
+++ b/.babelrc.js
@@ -0,0 +1,15 @@
+module.exports = {
+  presets: [
+    [
+      'env',
+      {
+        modules: process.env.ESM ? false : 'commonjs',
+        targets: {
+          node: require('./package.json').engines.node.substring(2), // Strip `>=`
+        },
+      },
+    ],
+  ],
+  plugins: ['transform-class-properties', 'transform-flow-strip-types'],
+  ignore: ['__tests__'],
+};
diff --git a/package.json b/package.json
index 32d79c9b..3264feac 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,11 @@
     "middleware",
     "api"
   ],
-  "main": "dist/index.js",
+  "engines": {
+    "node": ">=4"
+  },
+  "main": "dist/index",
+  "module": "dist/index.mjs",
   "directories": {
     "lib": "./dist"
   },
@@ -34,26 +38,25 @@
   },
   "babel": {
     "presets": [
-      "es2015"
-    ],
-    "plugins": [
-      "transform-class-properties",
-      "transform-flow-strip-types"
+      "./.babelrc.js"
     ]
   },
   "scripts": {
-    "prepublish": ". ./resources/prepublish.sh",
     "test": "npm run lint && npm run check && npm run testonly",
     "testonly": "mocha $npm_package_options_mocha",
     "lint": "eslint src",
     "prettier": "prettier --write 'src/**/*.js'",
     "check": "flow check",
-    "build": "rm -rf dist/* && babel src --ignore __tests__ --out-dir dist && npm run build:flow",
+    "build": "npm run build:clean && npm run build:esm && npm run build:cjs && npm run build:flow",
+    "build:clean": "rm -rf dist/*",
+    "build:esm": "ESM=1 babel src -d dist/esm && for file in $(find dist/esm -name '*.js'); do mv \"$file\" `echo \"$file\" | sed 's/dist\\/esm/dist/g; s/.js$/.mjs/g'`; done && rm -rf dist/esm",
+    "build:cjs": "babel src -d dist",
     "build:flow": "find ./src -name '*.js' -not -path '*/__tests__*' | while read filepath; do cp $filepath `echo $filepath | sed 's/\\/src\\//\\/dist\\//g'`.flow; done",
     "watch": "node resources/watch.js",
     "cover": "babel-node node_modules/.bin/isparta cover --root src --report html node_modules/.bin/_mocha -- $npm_package_options_mocha",
     "cover:lcov": "babel-node node_modules/.bin/isparta cover --root src --report lcovonly node_modules/.bin/_mocha -- $npm_package_options_mocha",
     "preversion": "npm test",
+    "prepublish": ". ./resources/prepublish.sh",
     "start": "babel-node examples/index.js"
   },
   "dependencies": {
@@ -69,7 +72,7 @@
     "babel-plugin-transform-class-properties": "6.24.1",
     "babel-plugin-transform-flow-strip-types": "6.22.0",
     "babel-plugin-transform-runtime": "^6.23.0",
-    "babel-preset-es2015": "6.24.1",
+    "babel-preset-env": "^1.6.1",
     "babel-register": "^6.26.0",
     "babel-runtime": "^6.26.0",
     "body-parser": "1.18.2",
diff --git a/yarn.lock b/yarn.lock
index 60944b98..43eeed0a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -347,6 +347,14 @@ babel-generator@^6.26.0:
     source-map "^0.5.6"
     trim-right "^1.0.1"
 
+babel-helper-builder-binary-assignment-operator-visitor@^6.24.1:
+  version "6.24.1"
+  resolved "https://registry.yarnpkg.com/babel-helper-builder-binary-assignment-operator-visitor/-/babel-helper-builder-binary-assignment-operator-visitor-6.24.1.tgz#cce4517ada356f4220bcae8a02c2b346f9a56664"
+  dependencies:
+    babel-helper-explode-assignable-expression "^6.24.1"
+    babel-runtime "^6.22.0"
+    babel-types "^6.24.1"
+
 babel-helper-call-delegate@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-helper-call-delegate/-/babel-helper-call-delegate-6.24.1.tgz#ece6aacddc76e41c3461f88bfc575bd0daa2df8d"
@@ -365,6 +373,14 @@ babel-helper-define-map@^6.24.1:
     babel-types "^6.26.0"
     lodash "^4.17.4"
 
+babel-helper-explode-assignable-expression@^6.24.1:
+  version "6.24.1"
+  resolved "https://registry.yarnpkg.com/babel-helper-explode-assignable-expression/-/babel-helper-explode-assignable-expression-6.24.1.tgz#f25b82cf7dc10433c55f70592d5746400ac22caa"
+  dependencies:
+    babel-runtime "^6.22.0"
+    babel-traverse "^6.24.1"
+    babel-types "^6.24.1"
+
 babel-helper-function-name@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-helper-function-name/-/babel-helper-function-name-6.24.1.tgz#d3475b8c03ed98242a25b48351ab18399d3580a9"
@@ -452,11 +468,19 @@ babel-plugin-syntax-class-properties@^6.8.0:
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-class-properties/-/babel-plugin-syntax-class-properties-6.13.0.tgz#d7eb23b79a317f8543962c505b827c7d6cac27de"
 
+babel-plugin-syntax-exponentiation-operator@^6.8.0:
+  version "6.13.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-exponentiation-operator/-/babel-plugin-syntax-exponentiation-operator-6.13.0.tgz#9ee7e8337290da95288201a6a57f4170317830de"
+
 babel-plugin-syntax-flow@^6.18.0:
   version "6.18.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-flow/-/babel-plugin-syntax-flow-6.18.0.tgz#4c3ab20a2af26aa20cd25995c398c4eb70310c8d"
 
-babel-plugin-transform-async-to-generator@6.24.1:
+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-to-generator@6.24.1, babel-plugin-transform-async-to-generator@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-async-to-generator/-/babel-plugin-transform-async-to-generator-6.24.1.tgz#6536e378aff6cb1d5517ac0e40eb3e9fc8d08761"
   dependencies:
@@ -485,7 +509,7 @@ babel-plugin-transform-es2015-block-scoped-functions@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-block-scoping@^6.24.1:
+babel-plugin-transform-es2015-block-scoping@^6.23.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-block-scoping/-/babel-plugin-transform-es2015-block-scoping-6.26.0.tgz#d70f5299c1308d05c12f463813b0a09e73b1895f"
   dependencies:
@@ -495,7 +519,7 @@ babel-plugin-transform-es2015-block-scoping@^6.24.1:
     babel-types "^6.26.0"
     lodash "^4.17.4"
 
-babel-plugin-transform-es2015-classes@^6.24.1:
+babel-plugin-transform-es2015-classes@^6.23.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-classes/-/babel-plugin-transform-es2015-classes-6.24.1.tgz#5a4c58a50c9c9461e564b4b2a3bfabc97a2584db"
   dependencies:
@@ -509,33 +533,33 @@ babel-plugin-transform-es2015-classes@^6.24.1:
     babel-traverse "^6.24.1"
     babel-types "^6.24.1"
 
-babel-plugin-transform-es2015-computed-properties@^6.24.1:
+babel-plugin-transform-es2015-computed-properties@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-computed-properties/-/babel-plugin-transform-es2015-computed-properties-6.24.1.tgz#6fe2a8d16895d5634f4cd999b6d3480a308159b3"
   dependencies:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-destructuring@^6.22.0:
+babel-plugin-transform-es2015-destructuring@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-destructuring/-/babel-plugin-transform-es2015-destructuring-6.23.0.tgz#997bb1f1ab967f682d2b0876fe358d60e765c56d"
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-duplicate-keys@^6.24.1:
+babel-plugin-transform-es2015-duplicate-keys@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-duplicate-keys/-/babel-plugin-transform-es2015-duplicate-keys-6.24.1.tgz#73eb3d310ca969e3ef9ec91c53741a6f1576423e"
   dependencies:
     babel-runtime "^6.22.0"
     babel-types "^6.24.1"
 
-babel-plugin-transform-es2015-for-of@^6.22.0:
+babel-plugin-transform-es2015-for-of@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-for-of/-/babel-plugin-transform-es2015-for-of-6.23.0.tgz#f47c95b2b613df1d3ecc2fdb7573623c75248691"
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-function-name@^6.24.1:
+babel-plugin-transform-es2015-function-name@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-function-name/-/babel-plugin-transform-es2015-function-name-6.24.1.tgz#834c89853bc36b1af0f3a4c5dbaa94fd8eacaa8b"
   dependencies:
@@ -549,7 +573,7 @@ babel-plugin-transform-es2015-literals@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-modules-amd@^6.24.1:
+babel-plugin-transform-es2015-modules-amd@^6.22.0, babel-plugin-transform-es2015-modules-amd@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-amd/-/babel-plugin-transform-es2015-modules-amd-6.24.1.tgz#3b3e54017239842d6d19c3011c4bd2f00a00d154"
   dependencies:
@@ -557,16 +581,16 @@ babel-plugin-transform-es2015-modules-amd@^6.24.1:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-modules-commonjs@^6.24.1:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-commonjs/-/babel-plugin-transform-es2015-modules-commonjs-6.26.0.tgz#0d8394029b7dc6abe1a97ef181e00758dd2e5d8a"
+babel-plugin-transform-es2015-modules-commonjs@^6.23.0, babel-plugin-transform-es2015-modules-commonjs@^6.24.1:
+  version "6.26.2"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-commonjs/-/babel-plugin-transform-es2015-modules-commonjs-6.26.2.tgz#58a793863a9e7ca870bdc5a881117ffac27db6f3"
   dependencies:
     babel-plugin-transform-strict-mode "^6.24.1"
     babel-runtime "^6.26.0"
     babel-template "^6.26.0"
     babel-types "^6.26.0"
 
-babel-plugin-transform-es2015-modules-systemjs@^6.24.1:
+babel-plugin-transform-es2015-modules-systemjs@^6.23.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-systemjs/-/babel-plugin-transform-es2015-modules-systemjs-6.24.1.tgz#ff89a142b9119a906195f5f106ecf305d9407d23"
   dependencies:
@@ -574,7 +598,7 @@ babel-plugin-transform-es2015-modules-systemjs@^6.24.1:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-modules-umd@^6.24.1:
+babel-plugin-transform-es2015-modules-umd@^6.23.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-umd/-/babel-plugin-transform-es2015-modules-umd-6.24.1.tgz#ac997e6285cd18ed6176adb607d602344ad38468"
   dependencies:
@@ -582,14 +606,14 @@ babel-plugin-transform-es2015-modules-umd@^6.24.1:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-object-super@^6.24.1:
+babel-plugin-transform-es2015-object-super@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-object-super/-/babel-plugin-transform-es2015-object-super-6.24.1.tgz#24cef69ae21cb83a7f8603dad021f572eb278f8d"
   dependencies:
     babel-helper-replace-supers "^6.24.1"
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-parameters@^6.24.1:
+babel-plugin-transform-es2015-parameters@^6.23.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-parameters/-/babel-plugin-transform-es2015-parameters-6.24.1.tgz#57ac351ab49caf14a97cd13b09f66fdf0a625f2b"
   dependencies:
@@ -600,7 +624,7 @@ babel-plugin-transform-es2015-parameters@^6.24.1:
     babel-traverse "^6.24.1"
     babel-types "^6.24.1"
 
-babel-plugin-transform-es2015-shorthand-properties@^6.24.1:
+babel-plugin-transform-es2015-shorthand-properties@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-shorthand-properties/-/babel-plugin-transform-es2015-shorthand-properties-6.24.1.tgz#24f875d6721c87661bbd99a4622e51f14de38aa0"
   dependencies:
@@ -613,7 +637,7 @@ babel-plugin-transform-es2015-spread@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-sticky-regex@^6.24.1:
+babel-plugin-transform-es2015-sticky-regex@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-sticky-regex/-/babel-plugin-transform-es2015-sticky-regex-6.24.1.tgz#00c1cdb1aca71112cdf0cf6126c2ed6b457ccdbc"
   dependencies:
@@ -627,13 +651,13 @@ babel-plugin-transform-es2015-template-literals@^6.22.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-typeof-symbol@^6.22.0:
+babel-plugin-transform-es2015-typeof-symbol@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-typeof-symbol/-/babel-plugin-transform-es2015-typeof-symbol-6.23.0.tgz#dec09f1cddff94b52ac73d505c84df59dcceb372"
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-unicode-regex@^6.24.1:
+babel-plugin-transform-es2015-unicode-regex@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-unicode-regex/-/babel-plugin-transform-es2015-unicode-regex-6.24.1.tgz#d38b12f42ea7323f729387f18a7c5ae1faeb35e9"
   dependencies:
@@ -641,6 +665,14 @@ babel-plugin-transform-es2015-unicode-regex@^6.24.1:
     babel-runtime "^6.22.0"
     regexpu-core "^2.0.0"
 
+babel-plugin-transform-exponentiation-operator@^6.22.0:
+  version "6.24.1"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-exponentiation-operator/-/babel-plugin-transform-exponentiation-operator-6.24.1.tgz#2ab0c9c7f3098fa48907772bb813fe41e8de3a0e"
+  dependencies:
+    babel-helper-builder-binary-assignment-operator-visitor "^6.24.1"
+    babel-plugin-syntax-exponentiation-operator "^6.8.0"
+    babel-runtime "^6.22.0"
+
 babel-plugin-transform-flow-strip-types@6.22.0:
   version "6.22.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-flow-strip-types/-/babel-plugin-transform-flow-strip-types-6.22.0.tgz#84cb672935d43714fdc32bce84568d87441cf7cf"
@@ -648,7 +680,7 @@ babel-plugin-transform-flow-strip-types@6.22.0:
     babel-plugin-syntax-flow "^6.18.0"
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-regenerator@^6.24.1:
+babel-plugin-transform-regenerator@^6.22.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-regenerator/-/babel-plugin-transform-regenerator-6.26.0.tgz#e0703696fbde27f0a3efcacf8b4dca2f7b3a8f2f"
   dependencies:
@@ -675,34 +707,40 @@ babel-polyfill@^6.26.0:
     core-js "^2.5.0"
     regenerator-runtime "^0.10.5"
 
-babel-preset-es2015@6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-preset-es2015/-/babel-preset-es2015-6.24.1.tgz#d44050d6bc2c9feea702aaf38d727a0210538939"
+babel-preset-env@^1.6.1:
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/babel-preset-env/-/babel-preset-env-1.6.1.tgz#a18b564cc9b9afdf4aae57ae3c1b0d99188e6f48"
   dependencies:
     babel-plugin-check-es2015-constants "^6.22.0"
+    babel-plugin-syntax-trailing-function-commas "^6.22.0"
+    babel-plugin-transform-async-to-generator "^6.22.0"
     babel-plugin-transform-es2015-arrow-functions "^6.22.0"
     babel-plugin-transform-es2015-block-scoped-functions "^6.22.0"
-    babel-plugin-transform-es2015-block-scoping "^6.24.1"
-    babel-plugin-transform-es2015-classes "^6.24.1"
-    babel-plugin-transform-es2015-computed-properties "^6.24.1"
-    babel-plugin-transform-es2015-destructuring "^6.22.0"
-    babel-plugin-transform-es2015-duplicate-keys "^6.24.1"
-    babel-plugin-transform-es2015-for-of "^6.22.0"
-    babel-plugin-transform-es2015-function-name "^6.24.1"
+    babel-plugin-transform-es2015-block-scoping "^6.23.0"
+    babel-plugin-transform-es2015-classes "^6.23.0"
+    babel-plugin-transform-es2015-computed-properties "^6.22.0"
+    babel-plugin-transform-es2015-destructuring "^6.23.0"
+    babel-plugin-transform-es2015-duplicate-keys "^6.22.0"
+    babel-plugin-transform-es2015-for-of "^6.23.0"
+    babel-plugin-transform-es2015-function-name "^6.22.0"
     babel-plugin-transform-es2015-literals "^6.22.0"
-    babel-plugin-transform-es2015-modules-amd "^6.24.1"
-    babel-plugin-transform-es2015-modules-commonjs "^6.24.1"
-    babel-plugin-transform-es2015-modules-systemjs "^6.24.1"
-    babel-plugin-transform-es2015-modules-umd "^6.24.1"
-    babel-plugin-transform-es2015-object-super "^6.24.1"
-    babel-plugin-transform-es2015-parameters "^6.24.1"
-    babel-plugin-transform-es2015-shorthand-properties "^6.24.1"
+    babel-plugin-transform-es2015-modules-amd "^6.22.0"
+    babel-plugin-transform-es2015-modules-commonjs "^6.23.0"
+    babel-plugin-transform-es2015-modules-systemjs "^6.23.0"
+    babel-plugin-transform-es2015-modules-umd "^6.23.0"
+    babel-plugin-transform-es2015-object-super "^6.22.0"
+    babel-plugin-transform-es2015-parameters "^6.23.0"
+    babel-plugin-transform-es2015-shorthand-properties "^6.22.0"
     babel-plugin-transform-es2015-spread "^6.22.0"
-    babel-plugin-transform-es2015-sticky-regex "^6.24.1"
+    babel-plugin-transform-es2015-sticky-regex "^6.22.0"
     babel-plugin-transform-es2015-template-literals "^6.22.0"
-    babel-plugin-transform-es2015-typeof-symbol "^6.22.0"
-    babel-plugin-transform-es2015-unicode-regex "^6.24.1"
-    babel-plugin-transform-regenerator "^6.24.1"
+    babel-plugin-transform-es2015-typeof-symbol "^6.23.0"
+    babel-plugin-transform-es2015-unicode-regex "^6.22.0"
+    babel-plugin-transform-exponentiation-operator "^6.22.0"
+    babel-plugin-transform-regenerator "^6.22.0"
+    browserslist "^2.1.2"
+    invariant "^2.2.2"
+    semver "^5.3.0"
 
 babel-register@^6.26.0:
   version "6.26.0"
@@ -885,6 +923,13 @@ 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:
+  version "2.11.3"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.11.3.tgz#fe36167aed1bbcde4827ebfe71347a2cc70b99b2"
+  dependencies:
+    caniuse-lite "^1.0.30000792"
+    electron-to-chromium "^1.3.30"
+
 bser@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/bser/-/bser-2.0.0.tgz#9ac78d3ed5d915804fd87acb158bc797147a1719"
@@ -933,6 +978,10 @@ camelcase@^1.0.2:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-1.2.1.tgz#9bb5304d2e0b56698b2c758b08a3eaa9daa58a39"
 
+caniuse-lite@^1.0.30000792:
+  version "1.0.30000833"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000833.tgz#98e84fcdb4399c6fa0b0fd41490d3217ac7802b4"
+
 caseless@~0.12.0:
   version "0.12.0"
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
@@ -1458,6 +1507,10 @@ ee-first@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
 
+electron-to-chromium@^1.3.30:
+  version "1.3.45"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.45.tgz#458ac1b1c5c760ce8811a16d2bfbd97ec30bafb8"
+
 encodeurl@~1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.1.tgz#79e3d58655346909fe6f0f45a5de68103b294d20"
@@ -3033,7 +3086,11 @@ prettier@^1.10.2:
   version "1.10.2"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.10.2.tgz#1af8356d1842276a99a5b5529c82dd9e9ad3cc93"
 
-private@^0.1.6, private@^0.1.7:
+private@^0.1.6:
+  version "0.1.8"
+  resolved "https://registry.yarnpkg.com/private/-/private-0.1.8.tgz#2381edb3689f7a53d653190060fcf822d2f368ff"
+
+private@^0.1.7:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/private/-/private-0.1.7.tgz#68ce5e8a1ef0a23bb570cc28537b5332aba63ef1"
 
@@ -3172,8 +3229,8 @@ readdirp@^2.0.0:
     set-immediate-shim "^1.0.1"
 
 regenerate@^1.2.1:
-  version "1.3.2"
-  resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.3.2.tgz#d1941c67bad437e1be76433add5b385f95b19260"
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.3.3.tgz#0c336d3980553d755c39b586ae3b20aa49c82b7f"
 
 regenerator-runtime@^0.10.5:
   version "0.10.5"

From f2adf5bd6248a31da8864ed4e0c3d424fa2cd61a Mon Sep 17 00:00:00 2001
From: Jayden Seric <me@jaydenseric.com>
Date: Thu, 3 May 2018 00:25:52 +1000
Subject: [PATCH 2/5] Fix test transpilation.

---
 .babelrc.js  | 3 +--
 package.json | 4 ++--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/.babelrc.js b/.babelrc.js
index 574e4773..90641c4c 100644
--- a/.babelrc.js
+++ b/.babelrc.js
@@ -10,6 +10,5 @@ module.exports = {
       },
     ],
   ],
-  plugins: ['transform-class-properties', 'transform-flow-strip-types'],
-  ignore: ['__tests__'],
+  plugins: ['transform-class-properties', 'transform-flow-strip-types']
 };
diff --git a/package.json b/package.json
index 3264feac..82f89052 100644
--- a/package.json
+++ b/package.json
@@ -49,8 +49,8 @@
     "check": "flow check",
     "build": "npm run build:clean && npm run build:esm && npm run build:cjs && npm run build:flow",
     "build:clean": "rm -rf dist/*",
-    "build:esm": "ESM=1 babel src -d dist/esm && for file in $(find dist/esm -name '*.js'); do mv \"$file\" `echo \"$file\" | sed 's/dist\\/esm/dist/g; s/.js$/.mjs/g'`; done && rm -rf dist/esm",
-    "build:cjs": "babel src -d dist",
+    "build:esm": "ESM=1 babel src -d dist/esm --ignore __tests__ && for file in $(find dist/esm -name '*.js'); do mv \"$file\" `echo \"$file\" | sed 's/dist\\/esm/dist/g; s/.js$/.mjs/g'`; done && rm -rf dist/esm",
+    "build:cjs": "babel src -d dist --ignore __tests__",
     "build:flow": "find ./src -name '*.js' -not -path '*/__tests__*' | while read filepath; do cp $filepath `echo $filepath | sed 's/\\/src\\//\\/dist\\//g'`.flow; done",
     "watch": "node resources/watch.js",
     "cover": "babel-node node_modules/.bin/isparta cover --root src --report html node_modules/.bin/_mocha -- $npm_package_options_mocha",

From 28cace0af498659e6f3727712cb448cb3ac0ffaa Mon Sep 17 00:00:00 2001
From: Jayden Seric <me@jaydenseric.com>
Date: Thu, 3 May 2018 00:27:00 +1000
Subject: [PATCH 3/5] Fix index  ESM exports.

This one needs careful consideration.
---
 src/index.js | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/index.js b/src/index.js
index a8a81a11..13a35a0c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -138,8 +138,7 @@ type Middleware = (request: $Request, response: $Response) => Promise<void>;
  * Middleware for express; takes an options object or function as input to
  * configure behavior, and returns an express middleware.
  */
-module.exports = graphqlHTTP;
-function graphqlHTTP(options: Options): Middleware {
+export default function graphqlHTTP(options: Options): Middleware {
   if (!options) {
     throw new Error('GraphQL middleware requires options.');
   }
@@ -381,8 +380,7 @@ export type GraphQLParams = {
  * Provided a "Request" provided by express or connect (typically a node style
  * HTTPClientRequest), Promise the GraphQL request parameters.
  */
-module.exports.getGraphQLParams = getGraphQLParams;
-function getGraphQLParams(request: $Request): Promise<GraphQLParams> {
+export function getGraphQLParams(request: $Request): Promise<GraphQLParams> {
   return parseBody(request).then(bodyData => {
     const urlData = (request.url && url.parse(request.url, true).query) || {};
     return parseGraphQLParams(urlData, bodyData);

From cb84e76952f7fb22660a001881c28ee078e63353 Mon Sep 17 00:00:00 2001
From: Jayden Seric <me@jaydenseric.com>
Date: Mon, 7 May 2018 12:36:40 +1000
Subject: [PATCH 4/5] Removed default export for cross-compatible ESM/CJS named
 exports.

This is a nesesary breaking change. This is consistent with the graphql package, which only has named exports.
---
 README.md                   | 12 ++++++------
 examples/index.js           |  2 +-
 src/__tests__/http-test.js  |  2 +-
 src/__tests__/usage-test.js |  2 +-
 src/index.js                |  2 +-
 5 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/README.md b/README.md
index a7278a6b..addbd337 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Just mount `express-graphql` as a route handler:
 
 ```js
 const express = require('express');
-const graphqlHTTP = require('express-graphql');
+const { graphqlHTTP } = require('express-graphql');
 
 const app = express();
 
@@ -38,7 +38,7 @@ Use `.get` or `.post` (or both) rather than `.use` to configure your route handl
 
 ```js
 const restify = require('restify');
-const graphqlHTTP = require('express-graphql');
+const { graphqlHTTP } = require('express-graphql');
 
 const app = restify.createServer();
 
@@ -162,7 +162,7 @@ This example uses [`express-session`][] to provide GraphQL with the currently lo
 
 ```js
 const session = require('express-session');
-const graphqlHTTP = require('express-graphql');
+const { graphqlHTTP } = require('express-graphql');
 
 const app = express();
 
@@ -207,7 +207,7 @@ This example illustrates adding the amount of time consumed by running the
 provided query, which could perhaps be used by your development tools.
 
 ```js
-const graphqlHTTP = require('express-graphql');
+const { graphqlHTTP } = require('express-graphql');
 
 const app = express();
 
@@ -273,9 +273,9 @@ running a GraphQL request. This function is used internally to handle the
 incoming request, you may use it directly for building other similar services.
 
 ```js
-const graphqlHTTP = require('express-graphql');
+const { getGraphQLParams } = require('express-graphql');
 
-graphqlHTTP.getGraphQLParams(request).then(params => {
+getGraphQLParams(request).then(params => {
   // do something...
 })
 ```
diff --git a/examples/index.js b/examples/index.js
index 1fe67583..11ebe70f 100644
--- a/examples/index.js
+++ b/examples/index.js
@@ -8,7 +8,7 @@
  */
 
 import express from 'express';
-import graphqlHTTP from '../src/';
+import { graphqlHTTP } from '../src/';
 import { buildSchema } from 'graphql';
 
 // Construct a schema, using GraphQL schema language
diff --git a/src/__tests__/http-test.js b/src/__tests__/http-test.js
index 05f4b5e5..bf451b64 100644
--- a/src/__tests__/http-test.js
+++ b/src/__tests__/http-test.js
@@ -30,7 +30,7 @@ import {
   GraphQLError,
   BREAK,
 } from 'graphql';
-import graphqlHTTP from '../';
+import { graphqlHTTP } from '../';
 
 const QueryRootType = new GraphQLObjectType({
   name: 'QueryRoot',
diff --git a/src/__tests__/usage-test.js b/src/__tests__/usage-test.js
index 4ec7842c..0ef29555 100644
--- a/src/__tests__/usage-test.js
+++ b/src/__tests__/usage-test.js
@@ -11,7 +11,7 @@ import { expect } from 'chai';
 import { describe, it } from 'mocha';
 import request from 'supertest';
 import express from 'express';
-import graphqlHTTP from '../';
+import { graphqlHTTP } from '../';
 
 describe('Useful errors when incorrectly used', () => {
   it('requires an option factory function', () => {
diff --git a/src/index.js b/src/index.js
index 13a35a0c..3fe33d18 100644
--- a/src/index.js
+++ b/src/index.js
@@ -138,7 +138,7 @@ type Middleware = (request: $Request, response: $Response) => Promise<void>;
  * Middleware for express; takes an options object or function as input to
  * configure behavior, and returns an express middleware.
  */
-export default function graphqlHTTP(options: Options): Middleware {
+export function graphqlHTTP(options: Options): Middleware {
   if (!options) {
     throw new Error('GraphQL middleware requires options.');
   }

From a5d02db55b4dc41823a8234a90ec4d148ccfe2c3 Mon Sep 17 00:00:00 2001
From: Jayden Seric <me@jaydenseric.com>
Date: Mon, 7 May 2018 13:05:14 +1000
Subject: [PATCH 5/5] Update Node.js support to v6+.

- Configured Travis to test on the latest stable Node.js version (v9-10+ were not being tested!), and the lowest supported version which is now v6. Removed unessesary versions in between.
- Updated package.json engines field, which in turn updates transpilation via dynamic Babel preset-env config.
---
 .travis.yml  | 4 +---
 package.json | 2 +-
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 993b6a62..82d4b065 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,10 +2,8 @@ language: node_js
 
 # https://github.com/nodejs/LTS
 node_js:
-  - "8"
-  - "7"
+  - "node"
   - "6"
-  - "4"
 
 git:
   depth: 5
diff --git a/package.json b/package.json
index 835a2d5c..55b78488 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "api"
   ],
   "engines": {
-    "node": ">=4"
+    "node": ">=6"
   },
   "main": "dist/index",
   "module": "dist/index.mjs",