I have following html, I'm getting topOffset
of each div, but child div under position:relative
div are taking unexpected offset
, I can't remove position
, any help/solution would be great.
I'm trying to set some js
behavior on some randomly generating div with offset
.
Note: I can only use javascript
not jq
.
document.getElementById('demo').innerHTML = document.getElementById('div1').offsetTop + " " + document.getElementById('div2').offsetTop + " " + document.getElementById('div2-child').offsetTop;
* { box-sizing: border-box; } html, body { margin: 0; padding: 0; } #div1 { border: 1px solid #000; padding: 10px; position: relative; } #div2 { border: 1px solid #000; padding: 10px; margin-top: 5px; position: relative; } #div2-child { border: 1px solid #000; padding: 10px; margin-top: 5px; }
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quidem, harum, officia quam magni provident tempora debitis mollitia placeat ducimus atque nobis fugit voluptatibus nisi commodi doloremque hic perspiciatis sint odit? <div id="div1">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quidem, harum, officia quam magni provident tempora debitis mollitia placeat ducimus atque nobis fugit voluptatibus nisi commodi doloremque hic perspiciatis sint odit?</div> <div id="div2"> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quidem, harum, officia quam magni provident tempora debitis mollitia placeat ducimus atque nobis fugit voluptatibus nisi commodi doloremque hic perspiciatis sint odit? <div id="div2-child">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quidem, harum, officia quam magni provident tempora debitis mollitia placeat ducimus atque nobis fugit voluptatibus nisi commodi doloremque hic perspiciatis sint odit?</div> </div> <p id=demo></p>
As mentioned in MDN HTMLElement.offsetTop
returns position relative to the parent element . So in your example document.getElementById('div2-child').offsetTop
returns top position relative to div2
So, if you want the position relative to window(viewport) you need to add child position with it's parent position like below:
document.getElementById('demo').innerHTML = document.getElementById('div1').offsetTop + " " + document.getElementById('div2').offsetTop + " " + (document.getElementById('div2-child').offsetParent.offsetTop + document.getElementById('div2-child').offsetTop);
or you could use element.getBoundingClientRect() as below:
document.getElementById('demo').innerHTML = document.getElementById('div1').offsetTop + " " + document.getElementById('div2').offsetTop + " " + (document.getElementById('div2-child').getBoundingClientRect().top);
/**
* Get the position of an element relative to the document body
*/
function absoluteOffset(el) {
var offset = el.offsetTop
var offsetParent = el.offsetParent
if (offsetParent === document.body) {
return offset
}
return offset + absoluteOffset(offsetParent)
}
var div1 = document.getElementById('div1') var div2 = document.getElementById('div2') var div2Child = document.getElementById('div2-child') document.getElementById('demo').innerHTML = absoluteOffset(div1) + ' ' + absoluteOffset(div2) + ' ' + absoluteOffset(div2Child) /** * Get the position of an element relative to the document body */ function absoluteOffset(el) { var offset = el.offsetTop var offsetParent = el.offsetParent if (offsetParent === document.body) { return offset } return offset + absoluteOffset(offsetParent) }
* { box-sizing: border-box; } html, body { margin: 0; padding: 0; } #div1 { border: 1px solid #000; padding: 10px; position: relative; } #div2 { border: 1px solid #000; padding: 10px; margin-top: 5px; position: relative; } #div2-child { border: 1px solid #000; padding: 10px; margin-top: 5px; }
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quidem, harum, officia quam magni provident tempora debitis mollitia placeat ducimus atque nobis fugit voluptatibus nisi commodi doloremque hic perspiciatis sint odit? <div id="div1">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quidem, harum, officia quam magni provident tempora debitis mollitia placeat ducimus atque nobis fugit voluptatibus nisi commodi doloremque hic perspiciatis sint odit?</div> <div id="div2"> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quidem, harum, officia quam magni provident tempora debitis mollitia placeat ducimus atque nobis fugit voluptatibus nisi commodi doloremque hic perspiciatis sint odit? <div id="div2-child">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quidem, harum, officia quam magni provident tempora debitis mollitia placeat ducimus atque nobis fugit voluptatibus nisi commodi doloremque hic perspiciatis sint odit?</div> </div> <p id=demo></p>
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