Wrapping with flex

By default, items in a flex container will shrink to fit and, if they can’t, they will overflow the container. For example, consider this markup:

<div class="container">
    <div class="item">Item 1</div>
    <div class="item">Item 2</div>
    <div class="item">Item 3</div>
    <div class="item">Item 4</div>
</div>

And this CSS:

.container {
    display: flex;
    width: 500px;
    background-color: #bbb;
    align-items: center;
    border: 1px solid #111;
}
.item {
    color: #111;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 23px;
    flex: 0 0 160px;
    height: 40px;
    border: 1px dashed #545454;
}

You may be wondering why the outer container is set with a width and not the flex shorthand property we looked at before. Remember, this is because unless the element is a...