Files
30-seconds-of-code/test/elementIsVisibleInViewport/elementIsVisibleInViewport.js
Angelos Chalaris 4f7da1be9b Test migration to jest by hand
Apparently using regular expressions is way easier.
2018-06-18 15:15:56 +03:00

9 lines
473 B
JavaScript

const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
const { top, left, bottom, right } = el.getBoundingClientRect();
const { innerHeight, innerWidth } = window;
return partiallyVisible
? ((top > 0 && top < innerHeight) || (bottom > 0 && bottom < innerHeight)) &&
((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth))
: top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;
};
module.exports = elementIsVisibleInViewport;