gulp Concat all css files into one using gulp-concat


First, Install gulp and gulp-concat plugin to your project localy

 npm install --save-dev gulp gulp-concat

and add gulp-concat task to your gulpfile.js

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

gulp.task('default', function() {

gulp.task('css', function() {
    return gulp.src('css/*.css')

gulp.task('default', ['css']);

After starting gulp command, plugin gulp-concat will take all the CSS files located in the css/ directory and concatenate them into a one file css/dist/concat.css