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JavaScript Gulp Basics Improving your Gulp Task Pipelines Putting Multiple Tasks Together

Ryan Doran
Ryan Doran
7,815 Points
Posted by Ryan Doran
Ryan Doran
7,815 Points

AssertionError [ERR_ASSERTION]: Task function must be specified at Gulp.set [as _setTask]

Gulp 4 requires the Gulp function to be specified. The video says to use: 

gulp.task('build', ['concatScripts', 'minifyScripts', 'compileSass']);

but for Gulp 4 (which is what most have at this time), you must use the gulp.series before the array of tasks to perform the synchronized build task.

gulp.task('build', gulp.series('concatScripts', 'minifyScripts', 'compileSass'));

hopefully this helps someone.