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; <div> ; <nobr> ; <wbr></wbr>■<!--Annotations-->: ▲Top<br>Like many computer languages, HTML files also provide annotation functions. The browser will ignore the text in this tag (it can be many lines) without displaying it. The general purpose of use: <br>Add descriptions to different parts of the text to facilitate future modifications. <br>This is especially important for more complex or non-private web pages. It not only reminds yourself, but also reminds your colleagues what this part does and what that part does. <br>Example: <br><!--Starting from here is the product order form--><br> is used as a copyright statement. <br>If you don’t want others to use or copy your webpage, you can add a warning word. <br>Example: <br><!--The copyright of this article is 1998, Creation of Webpage. Please do not copy without permission--><br>■ <p>: ▲Top<br></p> <p> is called a paragraph mark . Function: Leave a blank line between words, paintings, tables, etc. <br>Originally </p> <p> is a closing tag, marked at the beginning and end of a paragraph, but starting from HTML 2.0, there is no need for </p> to end. <br><p> Common parameters: For example: </p> <p align="center"><br>align="center" <br>Optional values: right, left, center. <br>Default value: align="left" <br>Example: Source codeHere is the text for my paragraph. It does't matter how long it is, <br>how many space are between the words or when I decide to hit the return key. <br>It will create a new paragraph only when I begin the tag with another one. <br></p> <p>Here's the next paragraph. <br>Showing resultsHere is the text for my paragraph. It does't matter how long it is, how many space are between the words or when I decide to hit the return key. It will create a new paragraph only when I begin the tag with another one. <br>Here's the next paragraph.<br><br>■ <br> : ▲Top<br> is called a newline mark. Function: Make words, pictures, tables, etc. appear on the next line. <br>Since the browser automatically ignores blank spaces and line breaks in the source code, <br> becomes one of the most commonly used tags. Because no matter how beautiful the article you have compiled in the source code, if you do not add line breaks or paragraph marks appropriately, the browser will only display it as one large paragraph. <br>Error example: (The post office will not accept an address that exceeds one line) Source code 566 E Boston Post RD <br>Mamaroneck NY 10543-9982 <br>United States of America <br>Result 566 E Boston Post RD Mamaroneck NY 10543-9982 United States of America <br><br> Correct example: Original code 566 E Boston Post RD <br><br>Mamaroneck NY 10543-9982 <br><br>United States of America <br>Result 566 E Boston Post RD <br>Mamaroneck NY 10543-9982 <br>United States of America <br><br>■ </p> <hr>: ▲Top<br><hr> is called the horizontal line. Function: Insert a horizontal line. <br><hr> Parameter modification: <br>Take: <hr align="LEFT" size="2" width="70%" color="#0000FF" noshade> as an example. <br>align="LEFT" <br>Set the line placement position, you can choose from three settings: left; right; center. <br>size="2" <br>Set the line thickness in pixels, the default is 2. <br>width="70%" <br>Set the line length, which can be an absolute value (in pixels) or a relative value. The default is 100%. <br>color="#0000FF" 『Only applicable to IE』 <br>Set the line color, the default is black. #0000FF represents blue, and you can also use the name of the color, that is, text="blue" . <br>noshade <br>Set the line to be displayed as a plane. If deleted, it will have a shadow or a three-dimensional shape. This is the default value. <br>Example: Source code<hr> <br><hr align="LEFT" size="4"> <br><hr align="LEFT" size="2" width="70%" color="#0000FF " noshade> <br><hr align="LEFT" size="4" width="70" color="#008000"> <br>Show results <br>----------------------------- -------------------------------------------------- ------------------<br>---------------------------------- ----------------------------------------<br>---- -------------------------------------------------- --------------------------<br>---------------------- -------------------------------------------------- -------<br><br>■ <center>: ▲Top<br><center> is called the center mark. Function: Display words, pictures, tables, etc. in the middle. <br>This tag was originally defined by Netscape, and later other browsers supported it. However, you will find that many tags already have the parameter align="CENTER". <center> seems redundant. In fact, it is still one of the commonly used tags. , it is simple and easy to use, and is often used in text. For <table> tags with align="CENTER" parameters, you must also take the trouble to add a center tag, because many browsers do not support the <table> tag. align="CENTER" parameter. <br>Example: Source code<center>Chris's First Homepage</center> <br><center>What's new</center> <br><center>My profile</center> <br>Result Chris's First Homepage <br>What's new <br>My profile <br> <br>■ <pre class="brush:php;toolbar:false">: ▲Top<br><pre class="brush:php;toolbar:false"> is called the default format tag. Function: Display the files according to the arrangement of the source code. <br>This tag allows you to preserve the whitespace and returns you entered in the source code. Take a closer look at the following examples to appreciate the power of this markup. You can only achieve this effect by using this tag instead of using a bunch of table tags. <br>It is best if you can use the <pre class="brush:php;toolbar:false"> tag to produce an effect, or produce more than one line of blank space! <p>The above is the content of HTML language analysis and layout markup. For more related articles, please pay attention to the PHP Chinese website (www.php.cn)! </p><p><br></p>

The function of HTML is to define the structure and content of a web page, and its purpose is to provide a standardized way to display information. 1) HTML organizes various parts of the web page through tags and attributes, such as titles and paragraphs. 2) It supports the separation of content and performance and improves maintenance efficiency. 3) HTML is extensible, allowing custom tags to enhance SEO.

The future trends of HTML are semantics and web components, the future trends of CSS are CSS-in-JS and CSSHoudini, and the future trends of JavaScript are WebAssembly and Serverless. 1. HTML semantics improve accessibility and SEO effects, and Web components improve development efficiency, but attention should be paid to browser compatibility. 2. CSS-in-JS enhances style management flexibility but may increase file size. CSSHoudini allows direct operation of CSS rendering. 3.WebAssembly optimizes browser application performance but has a steep learning curve, and Serverless simplifies development but requires optimization of cold start problems.

The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.

The future of HTML is full of infinite possibilities. 1) New features and standards will include more semantic tags and the popularity of WebComponents. 2) The web design trend will continue to develop towards responsive and accessible design. 3) Performance optimization will improve the user experience through responsive image loading and lazy loading technologies.

The roles of HTML, CSS and JavaScript in web development are: HTML is responsible for content structure, CSS is responsible for style, and JavaScript is responsible for dynamic behavior. 1. HTML defines the web page structure and content through tags to ensure semantics. 2. CSS controls the web page style through selectors and attributes to make it beautiful and easy to read. 3. JavaScript controls web page behavior through scripts to achieve dynamic and interactive functions.

HTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.

HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.

HTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.


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