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Test Info:

<!DOCTYPE html>
<meta charset="utf-8">
<title>Box insets: top, right, bottom and left</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<!-- Regression test for https://github.com/jsdom/cssstyle/issues/281 -->
<div id="div"></div>
<script>
"use strict";
test(() => {
const div = document.getElementById("div");
div.style.top = "10px";
assert_equals(div.style.top, "10px");
}, "Position top");
test(() => {
const div = document.getElementById("div");
div.style.top = "-10px";
assert_equals(div.style.top, "-10px");
}, "Position top negative value");
test(() => {
const div = document.getElementById("div");
div.style.right = "20px";
assert_equals(div.style.right, "20px");
}, "Position right");
test(() => {
const div = document.getElementById("div");
div.style.right = "-20px";
assert_equals(div.style.right, "-20px");
}, "Position right negative value");
test(() => {
const div = document.getElementById("div");
div.style.bottom = "30px";
assert_equals(div.style.bottom, "30px");
}, "Position bottom");
test(() => {
const div = document.getElementById("div");
div.style.bottom = "-30px";
assert_equals(div.style.bottom, "-30px");
}, "Position bottom negative value");
test(() => {
const div = document.getElementById("div");
div.style.left = "40px";
assert_equals(div.style.left, "40px");
}, "Position left");
test(() => {
const div = document.getElementById("div");
div.style.left = "-40px";
assert_equals(div.style.left, "-40px");
}, "Position left negative value");
</script>