IsItThere?

Simple function that takes in an element and returns how much of it is visible in the viewport along with information about the top and bottom being visible

import isItThere from "isitthere";

const elm = document.getElementById("iAmADOMElement");
const results = isItThere(elm);

console.log(results);
// {
//    topVisible: True,
//    bottomVisible: False,
//    percentVisible: 0.55,
// }