Which element is able to utilize the inline-block style?

Currently, I am delving into the intricacies of the inline-block attribute and have a basic understanding that it allows elements to sit on the same row rather than stack on top of each other as they would in a normal layout. However, my grasp on how exactly inline-block functions is still somewhat hazy.

My primary query concerns whether an inline-block element X aligns itself on the same line as the preceding element or if it affects the alignment of the subsequent element relative to X.

To shed light on this confusion, consider the following code snippet:

div {
    background: #eee;
    color: black;
    margin: 10px;
}

.one {
    display: inline-block;
}
<div class="one">One</div>
<div class="two">Two</div>
<div class="one">Three</div>
<div class="one">Four</div>

Upon execution of the code snippet, the outcome bewilders me as 'One' appears on the same line but wrapped, 'Two' occupies a new line without any wrapping, while 'Three' and 'Four' share the same line (albeit differently from 'Two'). The behavior defies explanation, leaving me grappling with uncertainty. Could you elucidate why these elements exhibit such contrasting layouts?

Answer №1

inline-block positions the element within a line box, its exact placement influenced by surrounding elements and container size.

If a block-level element is not floating, it will be vertically separated from line boxes. This is because line boxes are specific to inline layout and do not apply to block layout where block-level elements are arranged vertically in normal flow. Hence why the second element appears on its own line.

The third and fourth elements lack a block-level separator, so they will share the same line box (unless wrapping is required) following element two. Think of them as two words in a sentence that always stick together.

Regrettably, there aren't many resources addressing the interplay between block and inline layouts. For more technical details, check out section 9.4 of CSS2.1. However, expect challenges in relating much of its content to this particular example.

Answer №2

According to the specification

§9.2.2 Inline-level elements and inline boxes

Elements that are inline-level refer to those in the source document that do not create new blocks of content; the content is distributed in lines (for example, text emphasized within a paragraph, inline images, etc.). An element becomes inline-level due to values of the 'display' property such as 'inline', 'inline-table', and 'inline-block'. Inline-level elements produce inline-level boxes that participate in an inline formatting context.

§9.2.1 Block-level elements and block boxes

Block-level elements are those in the source document formatted visually as blocks (e.g., paragraphs). Elements become block-level based on values of the 'display' property like 'block', 'list-item', and 'table'.

Boxes that are block-level participate in a block formatting context. Each block-level element generates a primary block-level box containing descendant boxes and generated content, which is also the box used in any positioning scheme.

When mixing block-level and inline-level boxes within a block container box, anonymous block boxes will be created:

§9.2.1.1 Anonymous block boxes

In a scenario like this:

<DIV>
  Some text
  <P>More text
</DIV>

(assuming the DIV and P both have 'display: block'), the DIV seems to contain both inline and block content. To simplify formatting definitions, we assume there is an anonymous block box around "Some text".

Diagram illustrating the three boxes in the given example

A graphic representing the three boxes, one of which is anonymous, in the provided example.

In essence: if a block container box (like the one created for the DIV) contains a block-level box (such as the P above), then it must only contain block-level boxes inside.

In your specific case, it might look something like this

Answer №3

div is typically a block-level element. However, .two is an exception to this rule as it does not have the display:inline-block property applied to it, making it default to display:block. This explains its unique appearance compared to other div elements.

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