@hilemangroup/bp-frontend/src/js/plugins/jquery.scrollto.js

Common shared frontend utilities for boilerplate projects

+(function ($) {
    var historySupported = !!window.history.pushState;

    var settings = {
        context: 'html, body',
        duration: 800,
        offset: 0
    };

    function getOffset($ctx, $elem, options) {
        return $elem.offset().top - options.offset;
    }

    function toHash(hash, options) {
        var $elem = $(hash);
        var $ctx;

        if (!$elem.length) { return; }

        options = $.extend({}, settings, options);
        $ctx = $(options.context);

        $ctx.animate(
            {
                scrollTop: getOffset($ctx, $elem, options)
            },
            options.duration,
            function () {
                if (historySupported) {
                    window.history.replaceState(null, '', hash);
                }

                if (typeof options.callback === 'function') {
                    options.callback();
                }
            }
        );
    }

    function toElem(elem, options) {
        var $elem = $(elem);
        var $ctx;

        if (!$elem.length) { return; }

        options = $.extend({}, settings, options);
        $ctx = $(options.context);

        $ctx.animate(
            {
                scrollTop: getOffset($ctx, $elem, options)
            },
            options.duration,
            (typeof options.callback === 'function')
                ? options.callback
                : null
        );
    }

    $.scrollto = {
        elem: toElem,
        hash: toHash
    };
})(jQuery);