how to check element is in viewport
function isVisible (ele) {
const { top, bottom } = ele.getBoundingClientRect();
const vHeight = (window.innerHeight || document.documentElement.clientHeight);
return (
(top > 0 || bottom > 0) &&
top < vHeight
);
}jquery check if element is visible in viewport
// this function runs every time you are scrolling
$(window).scroll(function() {
var top_of_element = $("#element").offset().top;
var bottom_of_element = $("#element").offset().top + $("#element").outerHeight();
var bottom_of_screen = $(window).scrollTop() + $(window).innerHeight();
var top_of_screen = $(window).scrollTop();
if ((bottom_of_screen > top_of_element) && (top_of_screen < bottom_of_element)){
// the element is visible, do something
} else {
// the element is not visible, do something else
}
});Copyright © 2021 Codeinu
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