As I scroll, I am looking for a way to hide my menu and trigger other actions when an image reaches the top of the screen. These images span the full width of the page, so they pass through every point on the x-axis. I've attempted using elementFromPoint, but that only gives me the entire html document. Is there a different method I can use to achieve this?
If your image remains fixed in place (which seems to be the case), you can utilize the following approach:
var timer;
$(document).scroll(function () {
// Implementing a timeout to prevent
// continuous execution at each scroll event.
// Only triggers when scrolling has stopped
if(timer) clearTimeout(timer);
timer = setTimeout(function () {
if($('#hello').offset().top - $(window).scrollTop() <= 0) {
$('#hello').attr('alt', 'Im touching the top!');
$('#status').text('Image is touching the top, or beyond it');
} else {
$('#hello').attr('alt', 'Not at top');
$('#status').text('Image is not touching the top');
}
}, 100);
});html, body {
height: 400%;
}
img {
position: absolute;
top: 150px;
width: 100px;
height: 100px;
}
#status {
position: fixed;
top: 0;
right: 0;
background: #000;
color: #fff;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="status">Image is not touching the top</div>
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