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Div, H2, or p elements are often called block-level elements. This symbolizes that these elements are displayed as a pattern, that is, "block boxes". In contrast, elements such as span and strong are referred to as "inline elements" because their forms are displayed in novice, that is, "inline boxes".

You can use the display property to reverse the type of natural box. This symbolizes that inline elements (such as metaphorical elements) can be exposed like block-level elements by configuring the display attribute to block. It is also important to set display to none so that the root of the generated element does not have a box. However, the box and all its contents are no longer displayed and do not take up space in the document.

In one case, however, block-level elements are established, even if they are not explicitly defined. This kind of environment occurs at the beginning of adding some text to a block-level element (such as div). Even if these text boundaries are not described as paragraphs, they will be treated as paragraphs:

Some text

Some more text.

In such cases, this box is called a named block because it is not associated with the elements of the convenient world.

A similar situation occurs in the text lines of block-level elements. If there is a paragraph that contains three lines of text. Each line of text forms a named box. It is not possible to use a name directly for a named block or row box, because there is no or use the center of the name (note that line box and line box are two different concepts). However, this helps to appreciate that everything you see on the screen creates some kind of box.

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