css/css-grid/alignment/grid-gutters-007.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Support for percentage values for gap with definite height and width for grid</title>
<link rel="help" href="https://www.w3.org/TR/css-grid-1/#gutters">
<link rel="help" href="https://www.w3.org/TR/css-align-3/#gap-shorthand">
<link rel="match" href="../reference/grid-equal-gutters-ref.html">
<link rel="author" title="Rachel Andrew" href="mailto:me@rachelandrew.co.uk">
<style>
    #grid {
        display: grid;
        width:200px;
        height: 200px;
        gap: 10%;
        grid-template-columns: 90px 90px;
        grid-template-rows: 90px 90px;
        background-color: green;
    }

    #grid > div {
        background-color: silver;
    }
</style>

<p>The test passes if it has the same visual effect as reference.</p>
<div id="grid">
    <div></div>
    <div></div>
    <div></div>
    <div></div>
</div>