gulpfile.js

var gulp = require('gulp');
var browserSync = require('browser-sync').create();
var sass = require('gulp-sass');


// Compile sass into CSS & auto-inject into browsers
gulp.task('sass', function() {
	return gulp.src(['./node_modules/bootstrap/scss/bootstrap.scss', './src/scss/*.scss'])
			.pipe(sass())
			.pipe(gulp.dest("./src/css"))
			.pipe(browserSync.stream());
});

// Move the javascript files into our src/js folder
gulp.task('js', function() {
	return gulp.src(['./node_modules/bootstrap/dist/js/bootstrap.min.js', './node_modules/jquery/dist/jquery.min.js', './node_modules/popper.js/dist/umd/popper.min.js'])
			.pipe(gulp.dest("./src/js"))
			.pipe(browserSync.stream());
});

// Static Server + Watching scss/html files
gulp.task('serve', ['sass'], function() {
	
	browserSync.init({
		server: "./src"
	});

	gulp.watch(["./node_modules/bootstrap/scss/bootstrap.scss", "./src/scss/*.scss"], ["sass"]);
	gulp.watch("src/*.html").on('change', browserSync.reload);
});


gulp.task('default', ['js', 'serve']);