How to create a basic gallery grid using an unordered list

Question

Using flex, I'm trying to create a gallery grid using an unordered list item.

It requires the first image to be 50%, then the other 4 images alongside it in a grid.

I have attached a js fiddle and an image of what I'm after, as I can't figure out where I'm going wrong.

http://jsfiddle.net/qj7u5tv6/

li:first-child{
  width: 50%;
} 

li:not(:first-child)  {
  width: 25%;
  flex-direction: row;
  display: flex;
  flex-wrap: wrap;
  
}

Thanks

Answer 1

Using grid it's pretty trivial.

Your layout is basically a two rows and 3 columns layout.
Both rows take 50% of the height or in fraction 1fr, while for first column takes 50% of the width and the others 25% or in fraction: 2fr, 1fr and 1fr.

The first image spans across the two rows.

ul {
  list-style: none;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
}

li:first-child {
  grid-row: span 2;
}

If you want a gap, you can add it to the grid:

  gap: 1rem;

To have the pictures fill their cells:

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

Snippet:

* {
  margin: 0px;
  padding: 0px;
}

ul {
  list-style: none;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 1rem;
}

li:first-child {
  grid-row: span 2;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

<ul>
  <li>
    <img src="https://via.placeholder.com/400" />
  </li>
  <li>
    <img src="https://via.placeholder.com/400" />
  </li>
  <li>
    <img src="https://via.placeholder.com/400" />
  </li>
  <li>
    <img src="https://via.placeholder.com/400" />
  </li>
  <li>
    <img src="https://via.placeholder.com/400" />
  </li>
</ul>