Use babel-preset-node6 on Node.js 6 and higher

Less transpilation, better performance, better stack traces, and less dependencies \o/

Author: sindresorhus

docs/recipes/babelrc.md

@@ -14,7 +14,7 @@ There are multiple options for configuring how AVA transpiles your tests using B
 
 ## AVA's default transpiler behavior
 
-By default, AVA transpiles your tests (and only your tests) using the [`es2015`](http://babeljs.io/docs/plugins/preset-es2015/) and [`stage-2`](http://babeljs.io/docs/plugins/preset-stage-2/) Babel presets. This is a great option for small modules where you do not desire a build step to transpile your source before deploying to `npm`.
+By default, AVA transpiles your tests (and only your tests) using the [`es2015-node4`](https://github.com/jbach/babel-preset-es2015-node4) on Node.js 4 or [`node6`](https://github.com/salakar/babel-preset-node6) on Node.js 6 and higher, and [`stage-2`](http://babeljs.io/docs/plugins/preset-stage-2/) Babel presets. This is a great option for small modules where you do not desire a build step to transpile your source before deploying to `npm`.
 
 ## Customizing how AVA transpiles your tests
 
@@ -25,7 +25,7 @@ You can override the default Babel configuration AVA uses for test transpilation
   "ava": {
     "babel": {
       "plugins": ["rewire"],
-      "presets": ["es2015", "stage-3"]
+      "presets": ["es2015-node4", "stage-3"]
     }
   }
 }
@@ -43,7 +43,7 @@ To transpile your sources, you will need to define a [`babel config` ](http://ba
     "require": ["babel-register"]
   },
   "babel": {
-    "presets": ["es2015"]
+    "presets": ["es2015-node4"]
   }
 }
 ```
@@ -63,12 +63,12 @@ Using the `"inherit"` shortcut will cause your tests to be transpiled the same a
     "babel": "inherit"
   },
   "babel": {
-    "presets": ["es2015", "react"]
+    "presets": ["es2015-node4", "react"]
   }
 }
 ```
 
-In the above example, both tests and sources will be transpiled using the [`es2015`](http://babeljs.io/docs/plugins/preset-es2015/) and [`react`](http://babeljs.io/docs/plugins/preset-react/) presets.
+In the above example, both tests and sources will be transpiled using the [`es2015-node4`](https://github.com/jbach/babel-preset-es2015-node4) and [`react`](http://babeljs.io/docs/plugins/preset-react/) presets.
 
 ## Extend your source transpilation configuration
 
@@ -87,12 +87,12 @@ When specifying the Babel config for your tests, you can set the `babelrc` optio
     }
   },
   "babel": {
-    "presets": ["es2015", "react"]
+    "presets": ["es2015-node4", "react"]
   }
 }
 ```
 
-In the above example, *sources* are compiled use [`es2015`](http://babeljs.io/docs/plugins/preset-es2015/) and [`react`](http://babeljs.io/docs/plugins/preset-react/), *tests* use those same plugins, plus the additional `custom` plugins specified.
+In the above example, *sources* are compiled use [`es2015-node4`](https://github.com/jbach/babel-preset-es2015-node4) and [`react`](http://babeljs.io/docs/plugins/preset-react/), *tests* use those same plugins, plus the additional `custom` plugins specified.
 
 ## Extend an alternate config file.
 

lib/babel-config.js

@@ -40,9 +40,9 @@ function lazy(initFn) {
 }
 
 const defaultPresets = lazy(() => {
-	const esPreset = semver.satisfies(process.version, '>=4') ?
-		'babel-preset-es2015-node4' :
-		'babel-preset-es2015';
+	const esPreset = semver.satisfies(process.version, '>=6') ?
+		'babel-preset-node6' :
+		'babel-preset-es2015-node4';
 
 	return [
 		require('babel-preset-stage-2'),

package.json

@@ -47,7 +47,7 @@
     "test-win": "tap --no-cov --reporter=classic --timeout=150 test/*.js test/reporters/*.js",
     "visual": "node test/visual/run-visual-tests.js",
     "prepublish": "npm run make-ts",
-    "make-ts": "babel-node --presets=babel-preset-es2015 --plugins=transform-runtime types/make.js"
+    "make-ts": "babel-node --presets=babel-preset-es2015-node4 --plugins=transform-runtime types/make.js"
   },
   "files": [
     "lib",
@@ -99,8 +99,8 @@
     "babel-plugin-detective": "^2.0.0",
     "babel-plugin-espower": "^2.3.1",
     "babel-plugin-transform-runtime": "^6.15.0",
-    "babel-preset-es2015": "^6.16.0",
     "babel-preset-es2015-node4": "^2.1.0",
+    "babel-preset-node6": "^11.0.0",
     "babel-preset-stage-2": "^6.17.0",
     "babel-runtime": "^6.11.6",
     "bluebird": "^3.0.0",

test/api.js

@@ -666,7 +666,7 @@ function generateTests(prefix, apiCreator) {
 
 		var api = apiCreator({
 			babelConfig: {
-				presets: ['react', 'es2015', 'stage-2']
+				presets: ['react', 'es2015-node4', 'stage-2']
 			}
 		});
 
@@ -840,7 +840,7 @@ function generateTests(prefix, apiCreator) {
 
 		var api = apiCreator({
 			babelConfig: {
-				presets: ['es2015', 'stage-2'],
+				presets: ['es2015-node4', 'stage-2'],
 				plugins: [testCapitalizerPlugin]
 			},
 			cacheEnabled: false

test/babel-config.js

@@ -35,7 +35,7 @@ test('uses babelConfig for babel options when babelConfig is an object', t => {
 	});
 
 	const babelConfig = {
-		presets: ['stage-2', 'es2015'],
+		presets: ['stage-2', 'es2015-node4'],
 		plugins: [customPlugin]
 	};
 
@@ -50,7 +50,7 @@ test('uses babelConfig for babel options when babelConfig is an object', t => {
 	t.false(options.ast);
 	t.true('inputSourceMap' in options);
 	t.false(options.babelrc);
-	t.strictDeepEqual(options.presets, ['stage-2', 'es2015']);
+	t.strictDeepEqual(options.presets, ['stage-2', 'es2015-node4']);
 	t.strictDeepEqual(options.plugins, [customPlugin, setup.powerAssert, throwsHelper, setup.rewrite, transformRuntime]);
 	t.end();
 });
@@ -65,7 +65,7 @@ test('should reuse existing source maps', t => {
 	});
 
 	const babelConfig = {
-		presets: ['stage-2', 'es2015'],
+		presets: ['stage-2', 'es2015-node4'],
 		plugins: [customPlugin]
 	};
 
@@ -79,7 +79,7 @@ test('should reuse existing source maps', t => {
 	t.true(options.sourceMaps);
 	t.false(options.ast);
 	t.true('inputSourceMap' in options);
-	t.strictDeepEqual(options.presets, ['stage-2', 'es2015']);
+	t.strictDeepEqual(options.presets, ['stage-2', 'es2015-node4']);
 	t.strictDeepEqual(options.plugins, [customPlugin, setup.powerAssert, throwsHelper, setup.rewrite, transformRuntime]);
 	t.end();
 });
@@ -94,7 +94,7 @@ test('should disable power-assert when powerAssert is false', t => {
 	});
 
 	const babelConfig = {
-		presets: ['stage-2', 'es2015'],
+		presets: ['stage-2', 'es2015-node4'],
 		plugins: [customPlugin]
 	};
 

test/fixture/babelrc/.alt-babelrc

@@ -1,4 +1,4 @@
 {
-  "presets": ["es2015", "stage-2"],
+  "presets": ["es2015-node4", "stage-2"],
   "plugins": ["../babel-plugin-foo-to-bar"]
 }

test/fixture/babelrc/.babelrc

@@ -1,4 +1,4 @@
 {
-  "presets": ["es2015", "stage-2"],
+  "presets": ["es2015-node4", "stage-2"],
   "plugins": ["../babel-plugin-test-doubler"]
 }

test/fixture/babelrc/test.js

@@ -1,3 +1,10 @@
-import test from '../../../'
+import test from '../../../';
 
-test('foo', t => t.pass());
+const fixture = [1, 2];
+
+test('foo', t => {
+	// using destructuring to ensure it transpiles on Node.js 4
+	// since that is a Node.js 6 feature
+	const [one, two] = fixture;
+	t.pass();
+});