How to find out if an element overflows (with jQuery)?

Question

The layout looks like this:

Basically all I want is to find out if the

Answer 1

All the answers here have not checked if element is at top: negative value or left: negative value.

So that's why, I am giving a more correct or precise answer here.

var pageWidth = $(".page").width();
var pageHeight = $(".page").height();
var pageTop = $(".page").offset().top;
var pageLeft = $(".page").offset().left;

var elementWidth = $(".element").width();
var elementHeight = $(".element").height();
var elementTop = $(".element").offset().top;
var elementLeft = $(".element").offset().left;


if ((elementLeft >= pageLeft) && (elementTop >= pageTop) && (elementLeft + elementWidth <= pageLeft + pageWidth) && (elementTop + elementHeight <= pageTop + pageHeight)) {
  // Its inside
  alert('Inside');
} else {
  //
  alert('Outside');
}

.page {
  overflow: hidden;
  width: 200px;
  height: 200px;
  position: relative;
  background: black;
}
.element {
  width: 100px;
  height: 100px;
  position: absolute;
  background: blue;
  top: -10px;
  left: -10px;
}

Check Fiddle