Flexbox: 4 items per row

Question

I\'m using a flex box to display 8 items that will dynamically resize with my page. How do I force it to split the items into two rows? (4 per row)?

Here is a releva

Answer 1

Flex wrap + negative margin

Why flex vs. display: inline-block?

• Flex gives more flexibility with elements sizing
• Built-in white spacing collapsing (see 3 inline-block divs with exactly 33% width not fitting in parent)

Why negative margin?

Either you use SCSS or CSS-in-JS for the edge cases (i.e. first element in column), or you set a default margin and get rid of the outer margin later.

Implementation

https://codepen.io/zurfyx/pen/BaBWpja

    

        

            

            
        
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:root {
  --columns: 2;
  --betweenColumns: 20px; /* This value is doubled when no margin collapsing */
}

.outerContainer {
    overflow: hidden; /* Hide the negative margin */
}

.container {
    background-color: grey;
    display: flex;
    flex-wrap: wrap;
    margin: calc(-1 * var(--betweenColumns));
}

.elementContainer {
    display: flex; /* To prevent margin collapsing */
    width: calc(1/var(--columns) * 100% - 2 * var(--betweenColumns));
    margin: var(--betweenColumns);
}

.element {
    display: flex;
    border: 1px solid red;
    background-color: yellow;
    width: 100%;
    height: 42px;
}