Run Gulp task before build in VS Code - asp.net-core

Question

I have a new empty .NET Core project. Can I automatically run Gulp tasks before a build in VS Code?
I can run the styles task manually by doing VS Code package manager -> Tasks: Run Task -> gulp -> gulp: styles, but when I do build it does not run.
/// <binding beforebuild="styles"></binding>
var gulp = require('gulp');
var gulpless = require('gulp-less');
gulp.task('styles', function () {
var srcfile = 'styles/Styles.less';
var dest = 'wwwroot';
return gulp
.src(srcfile)
.pipe(gulpless())
.pipe(gulp.dest(dest));
});
I got this code from some tutorials online and everything works except the first line.
Is this supposed to work in VS Code or is this only a luxury of Visual Studio?

Answer 1

//In this case we’re adding the a task before other task.
gulp.task('watch', ['array', 'of', 'tasks', 'to', 'complete','before', 'watch'], function (){
// ...
})
//And in this case we’re adding for example the browserSync task.
gulp.task('watch', ['browserSync'], function (){
gulp.watch('app/scss/**/*.scss', ['sass']);
// Other watchers
})
//We’ll also want to make sure sass runs before watch so the CSS will already be the latest whenever we run a Gulp command.
gulp.task('watch', ['browserSync', 'sass'], function (){
gulp.watch('app/scss/**/*.scss', ['sass']);
// Other watchers
});
Read this document : Gulp for Beginners