запретить нажимать на кнопку, пока не проскроллен блок полностью.(фуллскрин блок)

.wrapper{
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.header {
    min-height: 100vh;
    background: url("images/bgheader.jpg") center / cover no-repeat fixed;
    text-align: center;
    color: #fff;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.logo {
    width: 100%;
    height: 100%;
    flex: 1 1 auto;
    padding-top: 40px;
}
.tagline {
    font-size: 60px;
    font-family: "Bebas Neue";
    letter-spacing: 5.71px;
    line-height:70,31px;
}
.under_tagline {
    flex: 1 1 auto;
    font-size: 16px;
    font-family: Open Sans;
    font-size: 16px;
    font-style: normal;
    font-weight: 600;
    line-height: 22px;

}
.scroll {
    flex: 0 1 auto;
    padding-bottom: 71px;
}
.scroll-down{
    font-family: Open Sans;
    font-size: 11px;
    font-style: normal;
    font-weight: 600;
    line-height: 15px;
    letter-spacing: 3.700000047683716px;
    color: #fff;
    position: relative;
}

.scroll-down{
    padding: 20px;
}

    <div class="wrapper">
        <div class="header">
            <div class="logo">
                <a href=""><img src="images/logo.png" alt=""></a>
            </div>
            <p class="tagline">
                PARTNER WITH KONSTRUCT
            </p>
            <p class="under_tagline">
                An award-winning construction management firm
            </p>
            <div class="scroll">
                <a href="#scroll" class="scroll-down flowing-scroll">SCROLL DOWN</a>
            </div>
        </div>
  </div>

$(document).ready(function(){
    $('.navbar_burger').click(function(event){
        $('.navbar_burger,.navbar_link').toggleClass('active');
        $('body').toggleClass('lock')
    });
})

.navbar {
        position: sticky;
    top: 0;
    border-bottom: 1px solid #E6E6E6;
    z-index: 1;
}
.navbar:before{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fff;
    z-index: 3;
}
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}
.logo_link {
    flex: 0 0 100px;
    
        z-index: 4;
}
.logo_link img{
    width: 100%;
}
.navbar_burger {
    display: none;
}


.navbar_link{
    display: flex;
    justify-content: space-between;

}
.navbar_link li{
    margin:0 40px;
        z-index: 4;
}
.navbar_link li a{
    color: #48555B;
    font-family: Open Sans;
    font-size: 12px;
    font-style: normal;
    font-weight: 600;
    line-height: 16px;
    letter-spacing: 1.0909091234207153px;
}
.navbar_link li a:hover{
    color: #00a4e5;
}
.navbar_link li .active{
    color: #00a4e5;
}


@media(max-width: 767px){
    body.lock{
        overflow: hidden;
    }
    .logo_link{
        flex: 0 0 80px;
    }
    .nav{
        height: 40px;
    }
    .navbar_burger {
        display: block;
        width: 30px;
        height: 20px;
        position: relative;
        z-index: 4;
    }
    .navbar_burger span{
        position: absolute;
        width: 100%;
        height: 2px;
        background-color: #48555B;
        left: 0;
        top: 9px;
        transition:all 0.5s ease 0s;
    }
    .navbar_burger:before,
    .navbar_burger:after {
        content: '';
        position: absolute;
        width: 100%;
        height: 2px;
        background-color: #48555B;
        left: 0;
        transition:all 0.5s ease 0s;
    }
    .navbar_burger:before{
        top: 0;
    }
    .navbar_burger:after{
        bottom: 0;
    }
    .navbar_link{
        position: fixed;
        top: -100%;
        height: 100%;
        width: 100%;
        background-color: #325aff;
        display: block;
        padding: 60px 0 0 0;
        transition:all 0.5s ease 0s;
        overflow: auto;
    }
    .navbar_link.active{
        top: 0;
    }
    .navbar_link li{
        text-align: center;
        margin-bottom:40px ;
    }
    .navbar_link li a{
        font-size: 45px;

    }
}
.navbar_burger.active span{
    transform: scale(0);
}
.navbar_burger.active:before{
    transform: rotate(-405deg);
    top: 9px;
}
.navbar_burger.active:after{
    transform: rotate(405deg);
    bottom: 9px;
}

<div class="navbar" id="scroll">
            <div class="padding">
                <nav class="nav">
                    <div class="logo_link">
                        <a href="#">
                            <img src="images/logo_black_navbar.png" alt="">
                        </a>
                    </div>
                    <div class="navbar_burger">
                        <span></span>
                    </div>
                    <ul class="navbar_link">
                        <li><a href="#">Home</a></li>
                        <li><a class="active" href="#">About</a></li>
                        <li><a href="#">Service</a></li>
                        <li><a href="#">Work</a></li>
                        <li><a href="#">Contacts</a></li>
                    </ul>
                </nav>
            </div>
        </div>
    <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script>