How is it possible for flex-direction to function correctly even when display: flex is not explicitly defined

I'm unsure if it is required to specify the display property when the flex-direction is set in a container. Everything seems to be working fine without it, but I'm concerned that I might be causing issues:

.App {
    background-color: white;
    flex-direction: column;
    padding:15px;
    font-family: 'Roboto', sans-serif;
}

Answer №1

When it comes to block formatting context (using display: block), block elements automatically occupy the entire width of their parent, causing them to stack vertically.

According to the specification:

9.4.1 Block formatting contexts

In a block formatting context, boxes are placed one by one, vertically, starting at the top of the container block.

In a flex formatting context (using display: flex), specifically with flex-direction: column, items are also stacked vertically, mimicking the behavior of display: block.

Although the layout appears to be the same, it's important to note that the flex-direction property is not considered when in a block formatting context.

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