npm install browser-sync gulp --save-dev
var gulp = require('gulp');
var browserSync = require('browser-sync').create();
gulp.task('reload', function (done) {
browserSync.reload();
done();
});
gulp.task('default', ['reload'], function () {
browserSync.init({
server: {
baseDir: "./"
}
});
gulp.watch("./**/*.html", ['reload']);
});