Managing CSS flex-box growth in multi-line to create a grid of equal blocks

Question

I am looking for a way to create equally sized boxes with flexbox while using flex-growth: 1. This works pretty good by defining t

Answer 1

Seems like if flex-grow is set to 1, you have explicitly declared that you don't care for the boxes to be equally sized — when a given line has fewer items, you have instructed it to grow larger than your flex-basis.

Does setting a max-width on items equal to your flex-basis achieve what you want? See http://jsfiddle.net/C2q8D/4/ for that. I added a justify-content property to the flex container as well; just experimenting myself with how it affects this layout.

Answer 2

This is totally possible, however, you have to know how many columns you'll have at a maximum. http://jsfiddle.net/kelunik/C2q8D/6/

Solution

By adding a few empty placeholders, your cards get equally sized. You just have to make sure, you're adding enough placeholders. It doesn't matter if there are too many, because they'll have a height of zero and are not visible.

CSS

section {
    display: flex;
    flex-flow: row wrap;
    background-color: blue;
}

div {
    background-color: red;
    height: 3rem;
    flex: 1 0 10rem;
}

div:nth-child(even) {
    background-color: green;
}

div:empty {
    margin: 0;
    height: 0;
    border: 0;
    background: transparent;
}

HTML

<section>
    <div>a</div>
    <div>b</div>
    <div>c</div>
    <div>d</div>
    <div>e</div>
    <div>f</div>
    <div>g</div>
    <div>h</div>
    <div>i</div>
    <div>j</div>
    <div>k</div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
</section>