@prma85/gulp-babel

gulp-babel

Turn ES6 code into vanilla ES5 with no runtime required using babel

Issues with the output should be reported on the babel issue tracker.

Install

$ npm install --save-dev gulp-babel

Usage

var gulp = require('gulp');
var babel = require('gulp-babel');

gulp.task('default', function () {
	return gulp.src('src/app.js')
		.pipe(babel())
		.pipe(gulp.dest('dist'));
});

API

babel([options])

options

See the babel options, except for sourceMap and filename which is handled for you.

Source Maps

Use gulp-sourcemaps like this:

var gulp = require('gulp');
var sourcemaps = require('gulp-sourcemaps');
var babel = require('gulp-babel');
var concat = require('gulp-concat');

gulp.task('default', function () {
	return gulp.src('src/**/*.js')
		.pipe(sourcemaps.init())
		.pipe(babel())
		.pipe(concat('all.js'))
		.pipe(sourcemaps.write('.'))
		.pipe(gulp.dest('dist'));
});

Babel Metadata

Files in the stream are annotated with a babel property, which contains the metadata from babel.transform().

Example

var gulp = require('gulp');
var babel = require('gulp-babel');
var through = require('through2');

function logFileHelpers() {
	return through.obj(function (file, enc, cb) {
		console.log(file.babel.usedHelpers);
		cb(null, file);
	});
}

gulp.task('default', function () {
	return gulp.src('src/**/*.js')
		.pipe(babel())
		.pipe(logFileHelpers);
})

Runtime

If you are attempting to use features such as generators, you will need to pass { optional: ['runtime'] } to include the babel runtime. Otherwise you will receive the error: regeneratorRuntime is not defined.

var gulp = require('gulp');
var babel = require('gulp-babel');

gulp.task('default', function () {
	return gulp.src('src/app.js')
		.pipe(babel({ optional: ['runtime'] }))
		.pipe(gulp.dest('dist'));
});

License

MIT © Sindre Sorhus