导航栏启动时网站跳转。如何修复它

Question

这是我的javaskript，我认为问题出在这里？ 它会跳，那么如何修复它。 无法到达底部

window.onscroll = function() {
    myFunction();
};


var navbar = document.getElementById("navbar");
var placeholder = document.getElementById("navbar-placeholder");
var sticky = navbar.offsetTop - 10;

function myFunction() {
    if (window.scrollY >= sticky) {
        navbar.classList.add("sticky");
        placeholder.style.height = navbar.offsetHeight + "px"; // Set placeholder height
    } else {
        navbar.classList.remove("sticky");
        placeholder.style.height = "0"; // Reset placeholder height
    }
}

Answer 1

这是我的CSS：

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Arial", sans-serif;
    font-size: 15px;
}

h1 {
    margin-bottom: 5%;
}

p {
    margin-bottom: 10%;
}

/* image */

img {
    max-width: 100%;
    max-height: 100%;
}

/* Set dimensions for the container */
.top  {
    width: 100%;
    height: auto;
}

/* navbar */
#navbar {
    overflow: hidden;
    background-color: rgba(0, 200, 300);
    padding: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.6);
    margin-bottom: 5%;
}

#navbar a {
    float: left;
    display: block;
    color: rgb(3, 33, 133);
    text-align: center;
    padding: 20px;
    text-decoration: none;
    transition: background-color 0.3s;
}

#navbar a:hover {
    background-color: #bfc291;
}

#navbar a.darker {
    background-color: #222;
}

.content {
    padding: 16px;
}

.sticky {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: #222;
    z-index: 1000;
}

.sticky + .content {
    padding-top: 60px;
}

/* center af text */
.center-text {
    text-align: center;
    margin-top: 0;
}

.footer-basic {
    padding:40px 0;
    background-color:rgba(0, 200, 300);
    color: rgba(3, 33, 133);
  }

.footer-basic .social {
    text-align:center;
    padding-bottom:25px;
  }
  
.footer-basic .social > a {
    font-size:24px;
    width:40px;
    height:40px;
    line-height:40px;
    display:inline-block;
    text-align:center;
    border-radius:50%;
    border:1px solid #ccc;
    margin:0 50px;
    color:inherit;
    opacity:0.75;
  }
  
.footer-basic .social > a:hover {
    background-color: #bfc291;
  }

.footer-basic .copyright {
    margin-top:15px;
    text-align:center;
    font-size:13px;
    color:rgba(3, 33, 133);
    margin-bottom:0;
  }

.footer-link {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 15px;   
}