Smooth scrolling for in-page links

/**
 * Enables smooth page scrolling for in-page links
 * Usage: Just add this to your web page and it will automatically be applied.
 *
 * @Copyright 2016-2017 TNG Consulting Inc. GPLv3+ license.
 */
jQuery( document ).ready(function() {
    // Scroll to the in-page id. # alone takes you back to the top of the page.
    jQuery(document).on('click', 'a[href^="#"]', function(e) {
        // Get the target element id
        var id = jQuery(this).attr('href');

        if (id === '#') {
            return true; // Perform default action.
        }

        // Prevent standard hash navigation in Chrome and avoids blinking in IE.
        e.preventDefault();

        // Check if the target element exists
        var id = jQuery(id);
        if (id.length === 0) { // No.
            return false; // Do nothing.
        }
        // Scroll to id.
        var pos = jQuery(id).offset().top - 10;

        // Animated scrolling to id or top of page.
        jQuery('body,html').animate({scrollTop: pos}, 1000);
        return false;
    });
});