HTML中的各種格式標籤是什麼？-html教學-PHP中文網

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HTML中的各種格式標籤是什麼？

Robert Michael Kim

Apr 28, 2025 pm 05:39 PM

What are the various formatting tags in HTML?

HTML (Hypertext Markup Language) offers a variety of formatting tags that allow developers to structure and style the content of web pages. Here's a comprehensive list of some of the most common formatting tags:

<code>: Renders text in bold.
<code>: Renders text in bold but also indicates that the text is of strong importance.
<code>: Renders text in italics.
<code>: Renders text in italics and indicates that the text is emphasized.
<code>: Underlines the text.
<code><s></s> or <code><strike></strike>: Strikes through the text, indicating that it's no longer accurate or relevant.
<code>: Highlights the text.
<code>: Renders text as a subscript, usually for chemical formulas or mathematical expressions.
<code>: Renders text as a superscript, often used for exponents or footnotes.
<code>: Reduces the font size of the text.
<code><big></big>: Increases the font size of the text, though this tag is deprecated and not recommended for use.
<code><tt></tt>: Renders text in a monospaced font, typically used for displaying code snippets or technical terms, although this tag is also deprecated.
<code><code>: Renders text in a monospaced font and is meant for displaying code.
<code><pre class="brush:php;toolbar:false"></pre>: Preserves both spaces and line breaks and renders text in a monospaced font.
<code><blockquote></blockquote>: Indicates that the enclosed text is an extended quotation.
<code><q></q>: Indicates a short, inline quotation.
<code><cite></cite>: Indicates a citation or reference to a source.
<code><dfn></dfn>: Indicates the defining instance of a term.
<code><abbr></abbr>: Indicates an abbreviation or acronym, with the option to provide a full expansion via the <code>title attribute.
<code><address></address>: Indicates contact information for the author/owner of the document or an article within the document.

These tags are part of HTML's core functionality to format and structure content, ensuring it is both semantically meaningful and visually appealing.

What are the most commonly used HTML tags for text formatting?

When formatting text on a webpage, several HTML tags stand out due to their widespread use and relevance to essential formatting tasks:

<code> and <code>: Both of these tags are used to make text bold. While <code> is purely presentational, <code> has semantic meaning indicating that the text is of strong importance.
<code> and <code>: These tags render text in italics. <code> is a presentational tag, while <code> provides semantic emphasis, suggesting the text is emphasized.
<code>: Used to underline text, though it's generally recommended to use CSS for underlining to avoid confusion with hyperlinks.
<code><s></s> or <code><strike></strike>: These tags draw a strikethrough line over text to indicate it's no longer accurate or relevant.
<code>: Highlights the text to draw the reader's attention, often used to highlight search terms.
<code><code>: Renders text in a monospaced font, typically used to display code snippets within a paragraph.
<code><pre class="brush:php;toolbar:false"></pre>: Preserves both spaces and line breaks, and is used for displaying preformatted text, such as poems or ASCII art.
<code>: Decreases the font size of the text, often used for fine print, disclaimers, or side comments.

These tags form the backbone of text formatting in HTML and are essential for creating visually engaging and readable content.

How do different HTML formatting tags affect the appearance of text on a webpage?

HTML formatting tags influence the visual appearance of text on a webpage in distinct ways, each affecting either the typography or the structure:

<code> and <code>: These tags make the text bold, making it stand out more and appear heavier. While <code> is purely stylistic, <code> indicates that the text is of significant importance, which can also influence how screen readers articulate the content.
<code> and <code>: These tags italicize the text, often used to differentiate it from the surrounding content or to provide emphasis. <code> has additional semantic meaning, indicating emphasis which can affect screen readers' pronunciation.
<code>: This tag underlines the text, a style traditionally associated with hyperlinks. It's recommended to use CSS for underlining to avoid confusing users.
<code><s></s> or <code><strike></strike>: These tags strike through the text, typically indicating that it has been deprecated or is no longer accurate.
<code>: This tag highlights the text in yellow (by default), drawing attention to specific content like search terms.
<code> and <code>: These tags respectively render text as subscript or superscript, affecting its baseline position, and are often used in scientific or mathematical contexts.
<code> and <code><big></big>: These tags adjust the font size, with <code> making text smaller and <code><big></big> (though deprecated) making it larger.
<code><tt></tt>, <code><code>, and <code><pre class="brush:php;toolbar:false"></pre>: These tags affect both the font and spacing. <code><tt></tt> and <code><code> use a monospaced font, ideal for displaying code or technical text. <code><pre class="brush:php;toolbar:false"></pre> preserves spaces and line breaks, commonly used for displaying preformatted text.
<code><blockquote></blockquote>: This tag indents the text from both sides, visually distinguishing it as a quotation.
<code><cite></cite>: This tag is usually rendered in italics and is meant to denote citations or references, helping to differentiate them from the rest of the text.

These effects help in visually organizing content, making it easier for users to understand and navigate the page.

Can you explain the purpose and usage of semantic HTML tags for formatting?

Semantic HTML tags are designed to provide meaning to the structure of web documents beyond just visual formatting. They help in describing the content more accurately to both the browser and assistive technologies, improving accessibility and SEO. Here's an explanation of the purpose and usage of some common semantic HTML tags used for formatting:

<code>: This tag not only makes the text bold, but it also indicates that the text has strong importance. Screen readers can recognize this tag and emphasize the importance during reading.
<code>: The emphasis tag not only italicizes the text, but it also conveys emphasis to screen readers, affecting how the text is read aloud.
<code>: This tag is used to highlight parts of the text for reference or notation purposes, improving the readability and drawing attention to specific content.
<code><code>: This tag is used to denote that the content is code, which helps search engines and screen readers recognize and properly interpret the code snippet.
<code><cite></cite>: The citation tag is used to reference titles of works, aiding in providing context and enhancing the semantic meaning of references.
<code><dfn></dfn>: This tag indicates the defining instance of a new term, which can be useful for glossary pages or educational content.
<code><abbr></abbr>: The abbreviation tag is used to mark up abbreviations and acronyms, with the ability to provide a full expansion via the <code>title attribute, improving clarity and accessibility.
<code><address></address>: This tag is specifically used for marking up contact information for the document's author or owner, helping to clearly distinguish this information from the main content.
<code><blockquote></blockquote>: This tag is used for longer quotations, providing a semantic hint that the content is a quotation, which can improve the structure and readability of the page.
<code><q></q>: Used for inline quotations, this tag helps distinguish quoted text from the surrounding content.

Using these semantic tags enhances the understanding of content by search engines and improves the user experience for assistive technologies, while also providing a clearer structure for better readability.

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