Exemple de code de la propriété CSS grid-row.

<style>
.exemple-grid-container{ 
  display : grid; 
  grid-template-columns : auto auto ; 
  grid-template-rows : [A] auto [B] auto [C] auto [A] auto [R] auto [C-star] auto [A] auto [B] auto [C] auto ; 
}

.grid-row-auto .cible{
  grid-row : auto; 
}
.grid-row-nombre .c1{ 
  grid-row : 1 / 3; 
}

.grid-row-nombre .c2{ 
  grid-row : 4 / -2; 
}

.grid-row-span .c1{  
  grid-row : 1 / span 3; 
}

.grid-row-span .c2{  
  grid-row : 3 / span 4; 
}

.grid-row-identifiant .c1{ 
   grid-row : 1 / C; 
}

.grid-row-identifiant .c2{ 
   grid-row : 3 / B -1; 
}

.grid-row-span-identifiant .c1{ 
   grid-row : 1 / span C; 
}

.grid-row-span-identifiant .c2{ 
   grid-row : 3 / span B; 
}

.exemple-grid-item{border:1px dotted #666; }
.exemple-grid-item.cible{border-color:#008A11; background-color:mediumaquamarine; }
.exemple { border:1px solid #2a712a; margin-bottom:10px; padding:5px; }
</style>
<strong>sans grid-row </strong> 
<div class="exemple exemple-grid-container">
  <div class="exemple-grid-item">Cel. 1A</div>
  <div class="exemple-grid-item">Cel. 2B</div>
  <div class="exemple-grid-item">Cel. 3C</div>
  <div class="exemple-grid-item">Cel. 4A</div>  
  <div class="exemple-grid-item">Cel. 5R</div>
  <div class="exemple-grid-item">Cel. 6C-start</div>
  <div class="exemple-grid-item">Cel. 7A</div>
  <div class="exemple-grid-item">Cel. 8B</div> 
  <div class="exemple-grid-item">Cel. 9C</div> 
  <div class="exemple-grid-item cible">Cel. cible</div> 
</div>

<strong>grid-row : auto / auto; </strong> 
<div class="exemple exemple-grid-container grid-row-auto">
  <div class="exemple-grid-item">Cel. 1A</div>
  <div class="exemple-grid-item">Cel. 2B</div>
  <div class="exemple-grid-item">Cel. 3C</div>
  <div class="exemple-grid-item">Cel. 4A</div>  
  <div class="exemple-grid-item">Cel. 5R</div>
  <div class="exemple-grid-item">Cel. 6C-start</div>
  <div class="exemple-grid-item">Cel. 7A</div>
  <div class="exemple-grid-item">Cel. 8B</div> 
  <div class="exemple-grid-item">Cel. 9C</div> 
  <div class="exemple-grid-item cible">Cel. cible</div> 
</div>

<strong>grid-row: numérique / numérique; </strong> 
<div class="exemple exemple-grid-container grid-row-nombre">
  <div class="exemple-grid-item">Cel. 1A</div>
  <div class="exemple-grid-item">Cel. 2B</div>
  <div class="exemple-grid-item">Cel. 3C</div>
  <div class="exemple-grid-item">Cel. 4A</div>  
  <div class="exemple-grid-item">Cel. 5R</div>
  <div class="exemple-grid-item">Cel. 6C-start</div>
  <div class="exemple-grid-item">Cel. 7A</div>
  <div class="exemple-grid-item">Cel. 8B</div> 
  <div class="exemple-grid-item">Cel. 9C</div> 
  <div class="exemple-grid-item cible c1">Cible 1</div> 
  <div class="exemple-grid-item cible c2">Cible 2</div>
</div>

<strong>grid-row: numérique / Identifiant; </strong> 
<div class="exemple exemple-grid-container grid-row-identifiant">
  <div class="exemple-grid-item">Cel. 1A</div>
  <div class="exemple-grid-item">Cel. 2B</div>
  <div class="exemple-grid-item">Cel. 3C</div>
  <div class="exemple-grid-item">Cel. 4A</div>  
  <div class="exemple-grid-item">Cel. 5R</div>
  <div class="exemple-grid-item">Cel. 6C-start</div>
  <div class="exemple-grid-item">Cel. 7A</div>
  <div class="exemple-grid-item">Cel. 8B</div> 
  <div class="exemple-grid-item">Cel. 9C</div> 
  <div class="exemple-grid-item cible c1">Cible 1</div> 
  <div class="exemple-grid-item cible c2">Cible 2</div>
</div>

<strong>grid-row: numérique / span numérique; </strong> 
<div class="exemple exemple-grid-container grid-row-span"> 
  <div class="exemple-grid-item cible c1">Cible 1</div>
  <div class="exemple-grid-item cible c2">Cible 2</div>
  <div class="exemple-grid-item">Cel. 1A</div>
  <div class="exemple-grid-item">Cel. 2B</div>
  <div class="exemple-grid-item">Cel. 3C</div>
  <div class="exemple-grid-item">Cel. 4A</div>  
  <div class="exemple-grid-item">Cel. 5R</div>
  <div class="exemple-grid-item">Cel. 6C-start</div>
  <div class="exemple-grid-item">Cel. 7A</div>
  <div class="exemple-grid-item">Cel. 8B</div> 
  <div class="exemple-grid-item">Cel. 9C</div> 
</div>

<strong>grid-row numérique / span Identifiant</strong> 
<div class="exemple exemple-grid-container grid-row-span-identifiant"> 
  <div class="exemple-grid-item cible c1">Cible 1</div> 
  <div class="exemple-grid-item">Cel. 1A</div>
  <div class="exemple-grid-item">Cel. 2B</div>
  <div class="exemple-grid-item">Cel. 3C</div>
  <div class="exemple-grid-item">Cel. 4A</div>  
  <div class="exemple-grid-item">Cel. 5R</div>
  <div class="exemple-grid-item">Cel. 6C-start</div>
  <div class="exemple-grid-item">Cel. 7A</div>
  <div class="exemple-grid-item">Cel. 8B</div> 
  <div class="exemple-grid-item">Cel. 9C</div>
  <div class="exemple-grid-item cible c2">Cible 2</div> 
</div>