html - Make a grid item span to the last row / column

Question

Is it possible to make a grid item span from the first to the last row when I don't know the number of rows?

Lets say I have the following html with an unknown number of boxes.

How can I make the third .box span from the first grid-line to the last?

.container {
  display: grid;
  grid-template-columns: repeat(3, minmax(10rem, 1fr)) [last-col] 35%;
  grid-template-rows: auto [last-line];
}

.box {
  background-color: blue;
  padding: 20px;
  border: 1px solid red;
}

.box:nth-child(3) {
  background-color: yellow;
  grid-column: last-col / span 1;
  grid-row: 1 / last-line;
}

<div class="container">
  <div class="box"></div>
  <div class="box"></div>
  <div class="box">3</div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
</div>

question from:https://stackoverflow.com/questions/44052336/make-a-grid-item-span-to-the-last-row-column

Answer 1

You can add grid-row-start to that boxes css, and set it to span an absurdly high number.

.container {
  display: grid;
  grid-template-columns: repeat(3, minmax(10rem, 1fr)) [last-col] 35%; 
  grid-template-rows: auto [last-line];
}

.box {
  background-color: blue;
  padding: 20px;
  border: 1px solid red;
}

.box:nth-child(3) {
  background-color: yellow;
  grid-column: last-col / span 1;
  grid-row: 1 / last-line;
  grid-row-start: span 9000;
}

<div class="container">
  <div class="box"></div>
  <div class="box"></div>
  <div class="box">3</div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
  <div class="box"></div>
</div>