<!doctype html>
<link rel="author" title="Xiaocheng Hu" href="mailto:xiaochengh@chromium.org">
<link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#background-position">
<link rel="help" href="https://drafts.csswg.org/css-values-4/#comp-func">
<link rel="match" href="reference/background-position-negative-percentage-comparison-ref.html">
<style>
.target {
  margin: 50px;
  width: 50px;
  height: 50px;
  border: 1px solid black;
  background-image: url("support/100x100-blue-and-orange.png");
  bac