Smooth Scroll to top and to target

back-to-top.js

// ---------------------------------------------------------
// Back to Top
// ---------------------------------------------------------
$(window).scroll(function () {
	if ($(this).scrollTop() > 100) {
		$('#back-top').fadeIn();
	} else {
		$('#back-top').fadeOut();
	}
});

$('#back-top a').click(function () {
	$('body').animate({
		scrollTop: 0
	}, 800);
	return false;
});

smooth-scroll-to-target.js

// Listen all anchors click
$('[data-href]').click(function(){
	var target = $(this).attr('data-href');
	$('body').animate({
		scrollTop: $(target).offset().top
	}, 800);
	return false; // Prevent anchor to add hash on url
});