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<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-grid/#overlarge-grids">
<link rel="author" title="Tab Atkins-Bittner" href="https://xanthir.com/contact">
<link rel="author" title="Elika J Etemad" href="http://inkedblade.net/contact">
<meta name="flags" content="should">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../support/computed-testcommon.js"></script>
<div id=target>
<div id=child1></div>
<div id=child2></div>
</div>
<style>
#target {
display: grid;
position: absolute;
}
</style>
<script>
const target = document.querySelector("#target");
const child1 = document.querySelector("#child1");
const child2 = document.querySelector("#child2");
test(()=>{
target.style.gridTemplateRows = "repeat(9999, 1px)";
target.style.gridTemplateColumns = "repeat(9999, 1px)";
const height = getComputedStyle(target).height;
const width = getComputedStyle(target).width;
assert_equals(height, "9999px", "repeat(9999, 1px) should make grid height 9999px");
assert_equals(width, "9999px", "repeat(9999, 1px) should make grid width 9999px");
target.removeAttribute('style');
}, "repeat(9999) should be supported in both axises");
test(()=>{
// Start from no explicit grid, so only implicit tracks happen
target.style.gridAutoRows = "1px";
target.style.gridAutoColumns = "1px";
child1.style.gridRowEnd = "10000";
child1.style.gridColumnEnd = "10000";
child2.style.gridRowStart = "-10000";
child2.style.gridColumnStart = "-10000";
const height = getComputedStyle(target).height;
const width = getComputedStyle(target).width;
assert_equals(height, "19998px", "Positioning children at lines -10k and 10k should generate 19998 implicit 1px tracks.");
assert_equals(width, "19998px", "Positioning children at lines -10k and 10k should generate 19998 implicit 1px tracks.");
target.removeAttribute('style');
child1.removeAttribute('style');
child2.removeAttribute('style');
}, "Implicit grid should support lines [-10k, 10k].");
</script>
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