Gulpfile.js

Gulp will run file named gulpfile.js

that is located at project root directory

gulpfile.js

Gulpfile.js

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

Require modules

Define tasks

gulp.task('task-name', function() {
  // task here
};

Gulpfile.js

gulp.task('task-name', function() {

  return gulp
          .src('src/filename.js')
          .pipe(jshint())
          .pipe(jshint.reporter('default'))
          .pipe(minify())
          .pipe(gulp.dest('dist/filename.js'));

});

https://github.com/gulpjs/gulp/blob/master/docs/API.md

Gulpfile.js

var gulp = require('gulp');
var del = require('del');

gulp.task('task-clean', function() {

  del('temp/file.js');

});

https://github.com/gulpjs/gulp/blob/master/docs/API.md

Gulpfile.js

gulp.task('watch-task', function() {

    gulp.watch('js/*.js', ['task-1', 'task-2']);

});

https://github.com/gulpjs/gulp/blob/master/docs/API.md

Watch file changes

Gulpfile.js

gulp.task('default', ['task-1', 'task-2', 'task-3']); 

https://github.com/gulpjs/gulp/blob/master/docs/API.md

Run multiple tasks

Runing tasks

$ gulp

Will run task named 'default'

$ gulp task-name

Will run task named 'task-name'

Runing tasks

gulpfile.js

var gulp = require('gulp');

gulp.task('default', function(){
  console.log('Hello!');
});

$ gulp

[17:00:00] Using gulpfile ~/demo/gulpfile.js
[17:00:00] Starting 'default'...
Hello!
[17:00:00] Finished 'default' after 102 μs