LibTest/html/IFrameElement/documentOffset_A01_t01.dart

// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart = 2.9

/// @assertion final documentOffset
/// Provides the coordinates of the element relative to the top of the document.
/// @description Checks that if there is no scroll, it should be equal to offset
/// of client rectangle.  

import "dart:html";
import "../../../Utils/expect.dart";

main() {
  var x = new Element.html('<div>First - div</div>');
  document.body.append(x);

  x = new Element.html('<iframe>Second - Iframe</iframe>');
  x.style.margin = '10px';
  document.body.append(x);

  var r = x.getBoundingClientRect();
  var off = x.documentOffset;

  Expect.approxEquals(r.left, off.x, 1, 'left');
  Expect.approxEquals(r.top, off.y, 1, 'top');
}