To style an arbitrary row, you could use a wrapper element with its display
set to contents
. See the code snippet below:
.grid-container {
display: grid;
grid-template-columns: repeat(5, 1fr);
grid-gap: 2px;
}
.grid-item {
border: 1px solid black;
padding: 5px;
}
.grid-row-wrapper {
display: contents;
}
.grid-row-wrapper > .grid-item {
background: skyblue;
}
<div class="grid-container">
<div class="grid-item">1</div>
<div class="grid-item">2</div>
<div class="grid-item">3</div>
<div class="grid-item">4</div>
<div class="grid-item">5</div>
<div class="grid-row-wrapper">
<div class="grid-item">6</div>
<div class="grid-item">7</div>
<div class="grid-item">8</div>
<div class="grid-item">9</div>
<div class="grid-item">10</div>
</div>
<div class="grid-item">11</div>
<div class="grid-item">12</div>
<div class="grid-item">13</div>
<div class="grid-item">14</div>
<div class="grid-item">15</div>
<div class="grid-item">16</div>
<div class="grid-item">17</div>
<div class="grid-item">18</div>
<div class="grid-item">19</div>
<div class="grid-item">20</div>
</div>
EDIT: As with all implementations, you should check to ensure it works in your target environment(s). You can check the compatibility table on MDN or caniuse.com for support for display: contents
: