Gulp-autoprefixer throwing ReferenceError: Promise is not defined
问题 I try to make a gulp compile my sass then autoprefixit with gulp-autoprefixer but i'm getting an error. var gulp = require('gulp'), sass = require('gulp-sass'), autoprefixer = require('gulp-autoprefixer'); gulp.task('test', function(){ gulp.src('_sass/main.sass') .pipe(sass()) .pipe(autoprefixer()) .pipe(gulp.dest('./assets/css')); }); I'm trying to run this Gulpfile.js and i'm using : "gulp": "~3.9.0", "gulp-sass": "~2.0.4", "gulp-autoprefixer": "~3.0.1", and NPM version 1.3.10 When i run