gulpfile.babel.js

/**
 * Created by chengyuan on 2017/3/14.
 */
import gulp from 'gulp';
import watch from 'gulp-watch';
import babel from 'gulp-babel';

gulp.task('transform', () => {
    return gulp.src('src/**/*.js')
        .pipe(babel({
            presets: ['es2015', 'es2016', 'es2017'],
            plugins: [
                [
                    "transform-runtime", {
                    "polyfill": false,
                    "regenerator": true
                }
                ]
            ]
        }))
        .on('error', function(err){
            console.log(err.stack);
            this.emit('end');
        })
        .pipe(gulp.dest('lib'));
});

gulp.task('watch', () => {
    return gulp.src('src/**/*.js')
        .pipe(watch('src/**/*.js', {
            verbose: true
        }))
        .pipe(babel({
            presets: ['es2015', 'es2016', 'es2017'],
            plugins: [
                [
                    "transform-runtime", {
                    "polyfill": false,
                    "regenerator": true
                }
                ]
            ]
        }))
        .pipe(gulp.dest('lib'));
});

gulp.task('default', () => {
    gulp.start('transform');
});