How do you handle dependencies and order of execution in Gulp?

Gulp handles dependencies and order of execution through task definition. To define a dependency, you list it in the second argument of gulp.task(). For instance, if ‘js’ depends on ‘clean’, we write: gulp.task(‘js’, [‘clean’], function() {…}). This ensures ‘clean’ runs before ‘js’.

For controlling order within tasks, Gulp 4 introduced series() and parallel() methods. The series() method executes tasks sequentially, while parallel() runs them concurrently. An example would be: gulp.series(‘task1’, ‘task2’) or gulp.parallel(‘task1’, ‘task2’).

However, remember that Gulp operates on the principle of maximum concurrency. It will always try to execute as many independent tasks simultaneously as possible unless explicitly told otherwise.