BACK2TOP.JS

Back2Top Js is a small library to create a back to top button using Vanilla JavaScript.

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DEMO https://chiranjit2020.github.io/back2top/index.html

HTML

<!-- Place the button on your page -->
<button id="back2top">BACK2TOP</button>

CSS

button#back2top{
    /*Button will appear on bottom-right corner of the page */
    position: fixed;
    right: 2%;
    bottom: 2%;
    opacity: 0;
    visibility: hidden;
    
    /*For better looking button*/
    font-family: sans-serif;
    font-size: 14px;
    color: #fff;
    line-height: 1.3;
    background-color: #123;
    border: none;
    outline: none;
    cursor: pointer;
    padding: 10px 18px;
    margin: 0;
}

JavaScript

//Add BACK2TOP.JS or BACK2TOP.MIN.JS file
//<script src="back2top.js"></script>
<script src="back2top.min.js"></script>
<script>
    const button = document.querySelector("#back2top");

    // Call the BACK2TOP Function
    // BACK2TOP(element, offsetToValue)
    // offsetValue = When the button will appear on the screen
    BACK2TOP(button, 200);
</script>

How To Control Animation

/*
* BACK2TOP(htmlElement, offsetValue, transition-property, transition-duration, transition-timing-function, transition-delay);

* Transition Property will be Visibility, Opacity and Transform

* Default value is set for - 
    transition-property = all,
    transition-duration = 300,
    transition-timing-function = ease,
    transition-delay = 0.

* You can avoid those above parameters if you want.

* Please give a ★ if you find this useful.
*/