Gulp, BrowserSync, Sass, Autoprefixer, Nodemon

app.js

var express = require('express');
var app = express();
var router = express.Router();
var hbs = require('hbs');

app.set('view engine', 'html');
app.engine('html', hbs.__express);

app.use(express.json());
app.use(express.urlencoded());
app.use(express.static('public'));

app.get('/', function(req, res) {
	res.sendfile('./views/index.html');
});

app.listen(5000);

gulpfile.js

var gulp = require('gulp');
var sass = require('gulp-sass');
var prefix = require('gulp-autoprefixer');
var browserSync = require('browser-sync');
var reload = browserSync.reload;
var nodemon = require('gulp-nodemon');

gulp.task('sass', function () {
	return gulp.src('public/scss/*.scss')
	.pipe(sass({outputStyle: 'compressed', sourceComments: 'map'}, {errLogToConsole: true}))
	.pipe(prefix("last 2 versions", "> 1%", "ie 8", "Android 2", "Firefox ESR"))
	.pipe(gulp.dest('public/css'))
	.pipe(reload({stream:true}));
});

gulp.task('browser-sync', ['nodemon'], function() {
	browserSync.init(null, {
		proxy: {
			host: "http://localhost",
			port: "5000"
		}
	});
});

gulp.task('default', ['sass', 'browser-sync'], function () {
	gulp.watch("public/scss/*.scss", ['sass']);
	gulp.watch(["public/js/**/*.js", "./*.html"], reload);
});

gulp.task('nodemon', function (cb) {
	var called = false;
	return nodemon({script: 'app.js'}).on('start', function () {
		if (!called) {
			called = true;
			cb();
		}
	});
});

@kevinSuttle @sogko the reason you're getting this is because the proxy option accepts a string, not an object as in your example. See http://www.browsersync.io/docs/options/#option-proxy.

Try this instead:

browserSync.init(null, {
    proxy: "http://localhost:<nodemon_server_port>",
    port: <port_you_want_in_your_browser>
});

Now, when you go to http://localhost:9000 (for example), it will pass through browserSync, proxy to the nodemon server on the port you specify in the proxy option, and when the response comes back through browserSync it will inject the snippet before returning the response to the browser.

@simonrobb so what are the defaults for these ports - can they be stored as variables and used in the nodemon configuration in the nodemon task?
I noticed in the gulp-nodemon documentation you can specify a custom debug port.
nodeArgs: ['--debug=9999']

What are the options you can pass to the reload method? When nodemon restarts, I want my app to redirect to /

@simonrobb +1 about the proxy accepting strings and not objects.

This was a lifesaver, excellent work. Broswersync isn't 100% for me yet but it's definitely useable.