logo   Til toppen med myBtn




Til toppen med knappen "myBtn" og rød firkant.




Funktionaliteten består af tre dele:


CSS

Placeres indenfor <style> ... </style> i nederste del af <header>

Firkante kan gøres større / mindre ved at ændre "padding".

#myBtn {
    display: none; /* Hidden by default */
    position: fixed; /* Fixed/sticky position */
    bottom: 20px; /* Place the button at the bottom of the page */
    right: 30px; /* Place the button 30px from the right */
    z-index: 99; /* Make sure it does not overlap */
    border: none; /* Remove borders */
    outline: none; /* Remove outline */
    background-color: red; /* Set a background color */
    color: white; /* Text color */
    cursor: pointer; /* Add a mouse pointer on hover */
    padding: 5px; /* Some padding */
    border-radius: 10px; /* Rounded corners */
    font-size: 18px; /* Increase font size */
}

#myBtn:hover {
    background-color: #555; /* Add a dark-grey background on hover */
}


Trigger

Placeres lige under <body>

<button onclick="topFunction()" id="myBtn" title="Go to top">Top</button>


Script

Placeres lige over </body>

<script>
//Get the button
var mybutton = document.getElementById("myBtn");

// When the user scrolls down 20px from the top of the document, show the button
window.onscroll = function() {scrollFunction()};

function scrollFunction() {
if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
mybutton.style.display = "block";
} else {
mybutton.style.display = "none";
}
}

// When the user clicks on the button, scroll to the top of the document
function topFunction() {
document.body.scrollTop = 0;
document.documentElement.scrollTop = 0;
}
</script>




















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