I was trying this code from W3Schools and modified it to assign the resulted LEFT value to another element (DIV)
Nothing happens even if the left value 8 is correctly recovered ! Any idea on how i am trying this assigning wrong ! Thanks
To directly assign CSS you need to pass a valid value more on MDN to it. So it needs to have e.g. "px" or "%" at it.
In short, it would work like that:
document.getElementById("aaa").style.left = x + "px";
You want to add: + "px"
Therefore change the following line:
document.getElementById("aaa").style.left = x;
to:
document.getElementById("aaa").style.left = x + "px";