Created
February 18, 2016 05:59
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| function isElementVisible (el, withinEl) { | |
| var withinRect = withinEl ? | |
| withinEl.getBoundingClientRect() : | |
| { top: 0, left: 0, right: window.innerWidth, bottom: window.innerHeight }; | |
| var rect = el.getBoundingClientRect(); | |
| return ( | |
| rect.top >= withinRect.top && | |
| rect.left >= withinRect.left && | |
| rect.bottom <= withinRect.bottom && | |
| rect.right <= withinRect.right | |
| ); | |
| } |
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Determine if one element is visible within the other