CSS

smooth scroll to anchor

/* Just use Native HTML Smooth Scroll */
html {
  scroll-behavior: smooth;
}

smooth scroll on anchor tag

document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function (e) {
        e.preventDefault();

        document.querySelector(this.getAttribute('href')).scrollIntoView({
            behavior: 'smooth'
        });
    });
});

smooth scroll to anchor

jQuery(document).ready(function($) {
					var $page = $('html, body');
					$('a[href*="#"]').click(function() {
						$page.animate({
							scrollTop: $($.attr(this, 'href')).offset().top-50
						}, 600);
						return false;
					});
					});