Using Autoprefixer with Gulp

gulpfile

var autoprefix = require('gulp-autoprefixer');

gulp.task('scss', function() {
    
    return gulp.src(appFiles.scss)
        .pipe(scss({
        errLogToConsole: true
    }))
        .pipe(autoprefix())
        .pipe(minifyCSS())
        .pipe(concat('ag.min.css'))
        .pipe(gulp.dest(appDirectory.dist + '/css'));
});