Scroll to anchor jQuery/JS

scroll-to-anchor.js

    /* SCROLLTO ANCHOR
     *******************************************************************************/
    $('.js-scroll-to').on('click', function(event) {
        event.preventDefault();

        var link = $(this).attr('href');
        var hashExpression = new RegExp("#([a-zA-Z0-9\-\_]*)$");

        if( hashExpression.test(link) ){

            var target = this.hash,
                $target = $(target);

            $('html, body').stop().animate({
                'scrollTop': $target.offset().top
            }, 400, 'swing');

            return;
        }

    });