function test() {
const elm = document.querySelector('.panel');
const options = {
    root: null,
    rootMargin: '0px',
    threshold: 0}

observer = new IntersectionObserver(elements => {
elements.forEach(element => {
if(element.intersectionRatio > 0) {
    var intersectionRatio = element.intersectionRatio;
    var isIntersecting = element.isIntersecting;
    var time = element.time;}
    });
});
observer.observe(elm );
return time;}

VM32254:16 Uncaught TypeError: Failed to execute 'observe' on 'IntersectionObserver': parameter 1 is not of type 'Element'.
at test (<anonymous>:16:14)
at <anonymous>:1:1