export function navSelectAnchor() {
    // let content = $('.content-nav');
    // if(content.length > 0){
    //     let heightNav = content.outerHeight();
    // }
    let link = $('.content-link');
    let windowDistance = $(window).scrollTop();
    if(link.length > 0){
        let fairsapp = $('#fairsapp').offset().top -1;
        let download = $('#download').offset().top -1;
        let sicurezza = $('#sicurezza').offset().top -1;
        let faq = $('#faq').offset().top -1;
        let contatti = $('#contatti').offset().top -1;

        let start = 0;

        if(windowDistance >= start && windowDistance <= fairsapp)
        {
            $('.nav-button').removeClass('selected');
        }

        else if(windowDistance >= fairsapp && windowDistance <= download)
        {
            $('.nav-button').removeClass('selected');
            $('.nav-button.nav-fairsapp').addClass('selected');
        }

        else if (windowDistance >= download && windowDistance <= sicurezza)
        {
            $('.nav-button').removeClass('selected');
            $('.nav-button.nav-download').addClass('selected');
        }

        else if(windowDistance >= sicurezza && windowDistance <= faq)
        {
            $('.nav-button').removeClass('selected');
            $('.nav-button.nav-sicurezza').addClass('selected');
        }

        else if(windowDistance >= faq && windowDistance <= contatti)
        {
            $('.nav-button').removeClass('selected');
            $('.nav-button.nav-faq').addClass('selected');
        }

        else if(windowDistance > contatti)
        {
            $('.nav-button').removeClass('selected');
            $('.nav-button.nav-contatti').addClass('selected');
        }
    }

}