LiveReload with gulp.

gulpfile.js

var gulp = require('gulp'),
    express = require('express'),
    connect_livereload = require('connect-livereload'),
    livereload = require('gulp-livereload');

var EXPRESS_PORT = 4000;
var EXPRESS_ROOT = __dirname;

function startExpress() {
    var app = express();
    app.use(connect_livereload());
    app.use(express.static(EXPRESS_ROOT));
    app.listen(EXPRESS_PORT);
}

gulp.task('watch', function() {
    startExpress();
    var server = livereload();
    gulp.watch(['static/**']).on('change', function(file) {
        server.changed(file.path);
  });
});