understanding-sampling/tasks/clean.js

import config from '../config';
import path from 'path';
import del from 'del';

/**
 * Clean build products
 *
 * @param cb: callback handler passed by gulp, signals task completion when called
 */
export const clean = (cb) => {

  const assetPath = path.join(config.paths.dest, config.paths.assets);

  del([
    path.join(assetPath, config.paths.css, '/**/*'),
    path.join(assetPath, config.paths.fonts, '/**/*'),
    path.join(assetPath, config.paths.images, '/**/*'),
    path.join(assetPath, config.paths.js, '/**/*')
  ]);

  cb();
};