gulp es7配置文件

/**
 * Created by udi on 2016/11/24.
 */
var gulp = require(‘gulp‘);
var babel = require(‘gulp-babel‘);


var es7SrcJs = ["es7/*/*.js"];
var descPath = "src";

gulp.task(‘babelify‘, function () {
    return gulp.src(es7SrcJs)
        .pipe(babel({
            presets: [‘es2015‘, ‘es2016‘, ‘es2017‘],
            plugins: [["transform-runtime", {
                "polyfill": false,
                "regenerator": true
            }]]
        }))
        .pipe(gulp.dest(descPath))
        .on(‘error‘, function (err) {
            console.log(err.stack);
            this.emit(‘end‘);
        })
});

gulp.task(‘watch‘, function(){
    return gulp.watch(es7SrcJs, [‘babelify‘]);
});

gulp.task(‘default‘, [‘babelify‘, ‘watch‘]);

var abc = o=>{ return 1;}

var sleep = function (time) {
    return new Promise(function (resolve, reject) {
        setTimeout(function () {
            resolve();
        }, time);
    })
};

var start = async function () {
    // 在这里使用起来就像同步代码那样直观
    console.log(‘start‘);
    await sleep(3000);
    console.log(‘end‘);
};

start();