Everytime I Get An Assertion Error While Running Gulp In Command Line

I'm trying to run the command below but unfortunately I run into an error. C:\Users\usver\Desktop\git test\git\Bootstrap4\conFusion>gulp I got assertion error after running the

Solution 1:

You are using gulp3 syntax in a gulp4 file.

Search your error message Task function must be specified and you will get lots of hits.

Change these lines:

gulp.task('sass:watch',function(){
    // gulp.watch('./css/*.scss',['sass']);

    gulp.watch('./css/*.scss', gulp.series('sass'));
    // gulp.watch('./css/*.scss', 'sass');    // should work too
});

and

// gulp.task('default',['browser-sync'],function(){
    //gulp.start('sass:watch');
// });

to

gulp.task('default', gulp.series('browser-sync', 'sass:watch'));

It looks like you were working off of an old gulp3 tutorial but look for some migration guides from gulp3 to gulp4 instead.