var gulp = require('gulp'); gulp.task('build', build); gulp.task('monitor', monitor); function build() { return gulp.src('./src/config.js') .pipe(gulp.dest('./build/')) .pipe(gulp.src('./src/secure.js')) .pipe(gulp.dest('./build/')); } function monitor() { gulp.watch('src/*.js', build); } gulp.task( 'default', gulp.series( build, monitor ) );