What are the three categories of html5 tags?

There are three types of html5 tags: 1. Block-level elements, whose display value is "block", are characterized by being able to set width, height, margins, and automatic line wrapping; 2. inline elements, whose display value is "inline" will not wrap automatically, and the width and height cannot be set; 3. Inline block elements will not wrap automatically, and the width and height can be set.

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

Classification of html5 tags

Tags are also called elements

• can be based on tag characteristics Divided into: block tags, inline (inline) tags, inline block tags

• According to the label closing rules, it can be divided into: single label (empty label, self-closing label), double label

Commonly used block elements:

....

Commonly used inline elements:
< strong> <var></p> <p>Commonly used inline block elements: <img> <input></p> <p style="text-align:left;"><span style="font-size: 16px;"><strong> Features of block-level elements: <strong><code class="marker">display:<strong><code class="marker">block;

## 1. Each block-level element starts on a new line, and subsequent elements also start on a new line.

2. The height, width, line height, and margin and padding values ​​​​of the top, bottom, left and right of the element can be set.

3. If the width of an element is not set, it is 100% of its parent container (the same as the width of the parent element), unless a width is set.

Characteristics of inline elements: display:inline;

1. On the same line as other elements;

2. The element’s

height, width and top and bottom margins are not allowed Settings (only supports left and right margin and padding);

3. The width of an element is the width of the text or image it contains and cannot be changed.

Characteristics of inline block elements: display:inline-block;

1, and other elements are in On one line; the height, width, line height, top and bottom margins of

2 and

elements can be set. (Supports upper, lower, left and right margin and padding values)

3. Margin: 0 auto is invalid

4. Horizontal arrangement, but all elements will have 1 space by default Gaps, because there is a carriage return and line feed between elements in HTML, and the browser will parse it into a space.

Conversion of tag type

The type of tag can be converted:

• Settings

  display:inline Convert to inline elements

• Settings

  display:linline-block Convert to inline block elements

• Settings

  display:block Convert to block-level elements

(Learning video sharing:

html video tutorial, web front-end )

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