inline-client-rect.html

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /intersection-observer/inline-client-rect.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta name="viewport" content="width=device-width,initial-scale=1">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="./resources/intersection-observer-test-utils.js"></script>

<style>

pre, #log {

  position: absolute;

  top: 120px;

  left: 0;

#scroller {

  width: 250px;

  overflow: auto;

#overflow {

  width: 1000px;

.content {

  width: 100px;

  height: 20px;

  padding: 40px 0;

  text-align: center;

  background-color: grey;

  display: inline-block;

</style>

<div id="scroller">

  <div id="overflow">

    <span><div class="content">1</div></span>

    <span><div class="content">2</div></span>

    <span><div class="content">3</div></span>

    <span id="target"><div class="content">4</div></span>

    <span><div class="content">5</div></span>

  </div>

</div>

<script>

var vw = document.documentElement.clientWidth;

var vh = document.documentElement.clientHeight;

var entries = [];

var scroller, target, spaceWidth, targetOffsetLeft, targetOffsetTop;

runTestCycle(function() {

  scroller = document.getElementById("scroller");

  assert_true(!!scroller, "scroller exists");

  target = document.getElementById("target");

  assert_true(!!target, "target exists");

  var observer = new IntersectionObserver(function(changes) {

    entries = entries.concat(changes)

});

  observer.observe(target);

  entries = entries.concat(observer.takeRecords());

  assert_equals(entries.length, 0, "No initial notifications.");

  runTestCycle(step0, "First rAF");

}, "Inline target");

function step0() {

  // Measure space width between two adjacent inlines.

  let nextEl = target.nextElementSibling;

  spaceWidth = nextEl.offsetLeft - target.offsetLeft - target.offsetWidth;

  // 8px body margin + 3 preceding siblings @ (100px width + spaceWidth) each

  targetOffsetLeft = 8 + 300 + (spaceWidth * 3);

  // 8px body margin + 40px top padding

  targetOffsetTop = 48;

  let left = targetOffsetLeft;

  let right = left + 100;

  let top = targetOffsetTop;

  let bottom = top + target.offsetHeight;

  scroller.scrollLeft = 90;

  runTestCycle(step1, "scroller.scrollLeft = 90");

  checkLastEntry(entries, 0, [left, right, top, bottom,

                              0, 0, 0, 0, 0, vw, 0, vh, false]);

function step1() {

  // -90px for scroll offset

  let left = targetOffsetLeft - 90;

  let right = left + 100;

  let top = targetOffsetTop;

  let bottom = top + target.offsetHeight;

  // 8px body margin + 250px client width of scroller

  let scrollerRight = 258;

  checkLastEntry(entries, 1, [left, right, top, bottom,

                              left, scrollerRight, top, bottom,

                              0, vw, 0, vh, true]);

</script>