app.js

$(document).ready(function () {
    // Add smooth scrolling to all links
    $("a").on("click", function (event) {
        // Make sure this.hash has a value before overriding default behavior
        if (this.hash !== "") {
            // Prevent default anchor click behavior
            event.preventDefault();
            // Store hash
            var hash = this.hash;
            // Using jQuery's animate() method to add smooth page scroll
            // The optional number (800) specifies the number of milliseconds it takes to scroll to the specified area
            $("html, body").animate(
                {
                    scrollTop: $(hash).offset().top,
                },
                800,
                function () {
                    // Add hash (#) to URL when done scrolling (default click behavior)
                    window.location.hash = hash;
                }
            );
        } // End if
    });
});