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Article Title<\/h2>\n
This is an article.<\/p>\n
Advanced Usage<\/h3>
In more complex scenarios, HTML5 can be combined with JavaScript and CSS to create dynamic and interactive web pages. Here is an example of creating simple animations using HTML5 canvas (
 \n\n\n  \n  \n  Canvas Animation<\/title>\n  <style>\n    canvas {\n      border: 1px solid black;\n    }\n  <\/style>\n<\/head>\n<body>
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						<span>Understanding H5 Code: The Fundamentals of HTML5</span>
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							<h1 class="Articlelist_txts_title">Understanding H5 Code: The Fundamentals of HTML5</h1>
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							<span id="wjcelcm34c"    class="Articlelist_txts_time">Apr 17, 2025 am	 12:08 AM</span>
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																			<span id="wjcelcm34c"    class="Articlelist_txts_infoss on">h5</span>
																			<span id="wjcelcm34c"    class="Articlelist_txts_infoss ">html5</span>
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					<p>HTML5 is a key technology for building modern web pages, providing many new elements and features. 1. HTML5 introduces semantic elements such as <header>, <footer>, <nav>, etc., which enhances web page structure and SEO. 2. Support multimedia elements <video> and <audio>, and can be embedded in media without plug-ins. 3. The form enhances new input types and verification properties, simplifying the verification process. 4. Offer offline and local storage capabilities to improve web page performance and user experience.</audio></video></nav></footer></header></p>
<h2 id="introduction"> introduction</h2>
<p> In today's online world, HTML5 has become the cornerstone of building modern web pages. Whether you are a beginner or an experienced developer, it is crucial to understand the basic principles of HTML5. This article will take you to explore the core concepts of HTML5 in depth, from basic knowledge to practical applications, and help you master this key technology. By reading this article, you will learn how to create a richer and more interactive web experience with HTML5.</p>
<h2 id="Review-of-basic-knowledge"> Review of basic knowledge</h2>
<p> HTML5 is the fifth version of HTML, which introduces many new elements and APIs, making web development more powerful and flexible. The core of HTML5 is the structured markup language, which defines the structure and content of a web page through tags and attributes. Some key concepts include:</p>
<ul>
<li> <strong>Elements and tags</strong> : HTML5 uses tags to define different parts of a web page, such as <code><header></header></code> , <code><footer></footer></code> , <code><article></article></code> , etc. These tags not only make the code more semantic, but also help search engines better understand web content.</li>
<li> <strong>Attribute</strong> : Attributes are used to add additional information to elements, such as <code>src</code> and <code>alt</code> attributes in <code><img src="/static/imghw/default1.png" data-src="image.jpg" class="lazy" alt="Understanding H5 Code: The Fundamentals of HTML5"></code> .</li>
<li> <strong>Semantics</strong> : HTML5 emphasizes semantic tagging, making the web page structure clearer and easy to maintain and SEO optimization.</li>
</ul>
<h2 id="Core-concept-or-function-analysis"> Core concept or function analysis</h2>
<h3 id="New-elements-and-functions-of-HTML"> New elements and functions of HTML5</h3>
<p> HTML5 introduces many new elements and functions, making web development more intuitive and efficient. Some important new elements include:</p>
<ul>
<li> <code><header></header></code> : Defines the header of a web page or section.</li>
<li> <code><footer></footer></code> : Defines the bottom of a web page or section.</li>
<li> <code><nav></nav></code> : Define the part that the navigation link is.</li>
<li> <code><article></article></code> : Define independent content, such as blog posts or news reports.</li>
<li> <code><section></section></code> : Defines a section or part in a document.</li>
<li> <code><aside></aside></code> : Defines the side content related to the main content.</li>
</ul>
<p> These elements not only make the web page structure clearer, but also enhance the accessibility and SEO performance of the web page.</p>
<h3 id="Multimedia-support"> Multimedia support</h3>
<p> A distinctive feature of HTML5 is its strong support for multimedia. With <code><video></video></code> and <code><audio></audio></code> elements, developers can easily embed video and audio content in web pages without relying on third-party plugins. This not only improves the user experience, but also simplifies the development process.</p><pre class='brush:php;toolbar:false;'> <video width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
  Your browser does not support the video tag.
</video></pre><h3 id="Form-enhancement"> Form enhancement</h3><p> HTML5 has significantly enhanced the form, introducing new input types and verification properties, such as <code>email</code> , <code>url</code> , <code>number</code> , etc. These new features make form verification simpler and more efficient, improving user experience.</p><pre class='brush:php;toolbar:false;'> <form>
  <input type="email" name="email" required>
  <input type="submit">
</form></pre><h3 id="Offline-storage-vs-local-storage"> Offline storage vs. local storage</h3><p> HTML5 introduces the concepts of offline storage and local storage, allowing web pages to continue working without a network connection. Through <code>localStorage</code> and <code>sessionStorage</code> , developers can store user data to improve the performance and user experience of web pages.</p><pre class='brush:php;toolbar:false;'> // Use localStorage to store data localStorage.setItem(&#39;username&#39;, &#39;John Doe&#39;);
// Get the stored data let username = localStorage.getItem(&#39;username&#39;);</pre><h2 id="Example-of-usage"> Example of usage</h2><h3 id="Basic-usage"> Basic usage</h3><p> Let's start with a simple HTML5 page showing how to use new semantic elements and multimedia support.</p><pre class='brush:php;toolbar:false;'> <!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>My HTML5 Page</title>
</head>
<body>
  <header>
    <h1>Welcome to My HTML5 Page</h1>
  </header>
  <nav>
    <ul>
      <li><a href="#home">Home</a></li>
      <li><a href="#about">About</a></li>
    </ul>
  </nav>
  <article>
    <h2>Article Title</h2>
    <p>This is an article.</p>
    <video width="320" height="240" controls>
      <source src="movie.mp4" type="video/mp4">
      Your browser does not support the video tag.
    </video>
  </article>
  <footer>
    <p>&copy; 2023 My HTML5 Page</p>
  </footer>
</body>
</html></pre><h3 id="Advanced-Usage"> Advanced Usage</h3><p> In more complex scenarios, HTML5 can be combined with JavaScript and CSS to create dynamic and interactive web pages. Here is an example of creating simple animations using HTML5 canvas ( <code><canvas></code> ).</p><pre class='brush:php;toolbar:false;'> <!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Canvas Animation</title>
  <style>
    canvas {
      border: 1px solid black;
    }
  </style>
</head>
<body>
  <canvas id="myCanvas" width="500" height="300"></canvas>
  <script>
    var canvas = document.getElementById(&#39;myCanvas&#39;);
    var ctx = canvas.getContext(&#39;2d&#39;);
    var x = 50;
    var y = 50;
    var dx = 2;
    var dy = 2;

    function draw() {
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      ctx.beginPath();
      ctx.arc(x, y, 20, 0, Math.PI*2);
      ctx.fillStyle = "#0095DD";
      ctx.fill();
      ctx.closePath();

      if(x dx > canvas.width-20 || x dx < 20) {
        dx = -dx;
      }
      if(y dy > canvas.height-20 || y dy < 20) {
        dy = -dy;
      }

      x = dx;
      y = dy;
    }

    setInterval(draw, 10);
  </script>
</body>
</html></pre><h3 id="Common-Errors-and-Debugging-Tips"> Common Errors and Debugging Tips</h3>
<p> When using HTML5, developers may encounter some common problems, such as:</p>
<ul>
<li> <strong>Browser Compatibility</strong> : Different browsers have different levels of support for HTML5, which may cause some functions to not work properly on some browsers. The solution is to use feature detection to ensure that the code works normally on different browsers.</li>
<li> <strong>Semantic error</strong> : Incorrect use of semantic elements can lead to confusion in web structure, affecting SEO and accessibility. Make sure each element is used for its design purposes and use the appropriate verification tool to check the code.</li>
<li> <strong>Performance issues</strong> : Overuse of JavaScript and multimedia elements may cause web pages to load slowly. Optimize code, reduce unnecessary resource loading, and use caching strategies to improve performance.</li>
</ul>
<h2 id="Performance-optimization-and-best-practices"> Performance optimization and best practices</h2>
<p> In practical applications, optimizing HTML5 code is the key to improving web page performance. Here are some optimization and best practice suggestions:</p>
<ul>
<li> <strong>Reduce HTTP requests</strong> : Merge and compress CSS and JavaScript files to reduce web page loading time.</li>
<li> <strong>Using Cache</strong> : Leverage browser cache and server-side cache to reduce duplicate loading resources.</li>
<li> <strong>Optimize images</strong> : Use appropriate image formats and compression techniques to reduce image file size.</li>
<li> <strong>Asynchronous loading</strong> : Use asynchronous loading techniques, such as lazy loading, to delay loading of non-critical resources.</li>
</ul>
<p> When writing HTML5 code, it is also very important to keep the code readable and maintained. Using appropriate indentation and comments and following consistent naming conventions can greatly improve the maintainability of the code.</p>
<p> In short, HTML5 provides powerful tools and features for modern web development. By understanding and applying these technologies in depth, you can create richer, interactive and efficient web pages. I hope this article can provide you with valuable insights and guidance to help you take a step further in the development of HTML5.</p><p>The above is the detailed content of Understanding H5 Code: The Fundamentals of HTML5. For more information, please follow other related articles on the PHP Chinese website!</p>


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									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
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									<h2>Hot AI Tools</h2>
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											<a href="http://ipnx.cn/ai/undress-ai-tool" title="Undress AI Tool" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													class="lazy"  data-src="https://img.php.cn/upload/ai_manual/001/246/273/173410641626608.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="Undress AI Tool" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/ai/undress-ai-tool" title="Undress AI Tool" class="phpmain_tab2_mids_title">
													<h3>Undress AI Tool</h3>
												</a>
												<p>Undress images for free</p>
											</div>
										</div>
																		<div   id="wjcelcm34c"   class="phpmain_tab2_mids_top">
											<a href="http://ipnx.cn/ai/undresserai-undress" title="Undresser.AI Undress" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													class="lazy"  data-src="https://img.php.cn/upload/ai_manual/001/246/273/173411540686492.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="Undresser.AI Undress" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/ai/undresserai-undress" title="Undresser.AI Undress" class="phpmain_tab2_mids_title">
													<h3>Undresser.AI Undress</h3>
												</a>
												<p>AI-powered app for creating realistic nude photos</p>
											</div>
										</div>
																		<div   id="wjcelcm34c"   class="phpmain_tab2_mids_top">
											<a href="http://ipnx.cn/ai/ai-clothes-remover" title="AI Clothes Remover" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													class="lazy"  data-src="https://img.php.cn/upload/ai_manual/001/246/273/173411552797167.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="AI Clothes Remover" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/ai/ai-clothes-remover" title="AI Clothes Remover" class="phpmain_tab2_mids_title">
													<h3>AI Clothes Remover</h3>
												</a>
												<p>Online AI tool for removing clothes from photos.</p>
											</div>
										</div>
																		<div   id="wjcelcm34c"   class="phpmain_tab2_mids_top">
											<a href="http://ipnx.cn/ai/clothoffio" title="Clothoff.io" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													class="lazy"  data-src="https://img.php.cn/upload/ai_manual/001/246/273/173411529149311.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="Clothoff.io" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/ai/clothoffio" title="Clothoff.io" class="phpmain_tab2_mids_title">
													<h3>Clothoff.io</h3>
												</a>
												<p>AI clothes remover</p>
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										</div>
																		<div   id="wjcelcm34c"   class="phpmain_tab2_mids_top">
											<a href="http://ipnx.cn/ai/video-swap" title="Video Face Swap" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													class="lazy"  data-src="https://img.php.cn/upload/ai_manual/001/246/273/173414504068133.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="Video Face Swap" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/ai/video-swap" title="Video Face Swap" class="phpmain_tab2_mids_title">
													<h3>Video Face Swap</h3>
												</a>
												<p>Swap faces in any video effortlessly with our completely free AI face swap tool!</p>
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									<a href="http://ipnx.cn/faq/1796833110.html" title="Roblox: 99 Nights In The Forest - All Badges And How To Unlock Them" class="phpgenera_Details_mainR4_bottom_title">Roblox: 99 Nights In The Forest - All Badges And How To Unlock Them</a>
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									<a href="http://ipnx.cn/faq/1796831905.html" title="Windows Security is blank or not showing options" class="phpgenera_Details_mainR4_bottom_title">Windows Security is blank or not showing options</a>
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											<div   id="wjcelcm34c"   class="phpgenera_Details_mainR3">
							<div   id="wjcelcm34c"   class="phpmain1_4R_readrank">
								<div   id="wjcelcm34c"   class="phpmain1_4R_readrank_top">
									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
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										src="/static/imghw/hottools2.png" alt="" />
									<h2>Hot Tools</h2>
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											<a href="http://ipnx.cn/toolset/development-tools/92" title="Notepad++7.3.1" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
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													class="lazy"  data-src="https://img.php.cn/upload/manual/000/000/001/58ab96f0f39f7357.jpg?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="Notepad++7.3.1" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/toolset/development-tools/92" title="Notepad++7.3.1" class="phpmain_tab2_mids_title">
													<h3>Notepad++7.3.1</h3>
												</a>
												<p>Easy-to-use and free code editor</p>
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																			<div   id="wjcelcm34c"   class="phpmain_tab2_mids_top">
											<a href="http://ipnx.cn/toolset/development-tools/93" title="SublimeText3 Chinese version" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													class="lazy"  data-src="https://img.php.cn/upload/manual/000/000/001/58ab97a3baad9677.jpg?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="SublimeText3 Chinese version" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/toolset/development-tools/93" title="SublimeText3 Chinese version" class="phpmain_tab2_mids_title">
													<h3>SublimeText3 Chinese version</h3>
												</a>
												<p>Chinese version, very easy to use</p>
											</div>
										</div>
																			<div   id="wjcelcm34c"   class="phpmain_tab2_mids_top">
											<a href="http://ipnx.cn/toolset/development-tools/121" title="Zend Studio 13.0.1" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													class="lazy"  data-src="https://img.php.cn/upload/manual/000/000/001/58ab97ecd1ab2670.jpg?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="Zend Studio 13.0.1" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/toolset/development-tools/121" title="Zend Studio 13.0.1" class="phpmain_tab2_mids_title">
													<h3>Zend Studio 13.0.1</h3>
												</a>
												<p>Powerful PHP integrated development environment</p>
											</div>
										</div>
																			<div   id="wjcelcm34c"   class="phpmain_tab2_mids_top">
											<a href="http://ipnx.cn/toolset/development-tools/469" title="Dreamweaver CS6" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													class="lazy"  data-src="https://img.php.cn/upload/manual/000/000/001/58d0e0fc74683535.jpg?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="Dreamweaver CS6" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/toolset/development-tools/469" title="Dreamweaver CS6" class="phpmain_tab2_mids_title">
													<h3>Dreamweaver CS6</h3>
												</a>
												<p>Visual web development tools</p>
											</div>
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																			<div   id="wjcelcm34c"   class="phpmain_tab2_mids_top">
											<a href="http://ipnx.cn/toolset/development-tools/500" title="SublimeText3 Mac version" class="phpmain_tab2_mids_top_img">
												<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
													class="lazy"  data-src="https://img.php.cn/upload/manual/000/000/001/58d34035e2757995.png?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="SublimeText3 Mac version" />
											</a>
											<div   id="wjcelcm34c"   class="phpmain_tab2_mids_info">
												<a href="http://ipnx.cn/toolset/development-tools/500" title="SublimeText3 Mac version" class="phpmain_tab2_mids_title">
													<h3>SublimeText3 Mac version</h3>
												</a>
												<p>God-level code editing software (SublimeText3)</p>
											</div>
										</div>
																	</div>
								<div   id="wjcelcm34c"   class="phpgenera_Details_mainR3_more">
									<a href="http://ipnx.cn/ai">Show More</a>
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					<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4">
						<div   id="wjcelcm34c"   class="phpmain1_4R_readrank">
							<div   id="wjcelcm34c"   class="phpmain1_4R_readrank_top">
								<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
									onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
									src="/static/imghw/hotarticle2.png" alt="" />
								<h2>Hot Topics</h2>
							</div>
							<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4_bottom">
															<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4_bottoms">
									<a href="http://ipnx.cn/faq/laravel-tutori" title="Laravel Tutorial" class="phpgenera_Details_mainR4_bottom_title">Laravel Tutorial</a>
									<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4_bottoms_info">
										<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4_bottoms_infos">
											<img src="/static/imghw/eyess.png" alt="" />
											<span>1597</span>
										</div>
										<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4_bottoms_infos">
											<img src="/static/imghw/tiezi.png" alt="" />
											<span>29</span>
										</div>
									</div>
								</div>
															<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4_bottoms">
									<a href="http://ipnx.cn/faq/php-tutorial" title="PHP Tutorial" class="phpgenera_Details_mainR4_bottom_title">PHP Tutorial</a>
									<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4_bottoms_info">
										<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4_bottoms_infos">
											<img src="/static/imghw/eyess.png" alt="" />
											<span>1488</span>
										</div>
										<div   id="wjcelcm34c"   class="phpgenera_Details_mainR4_bottoms_infos">
											<img src="/static/imghw/tiezi.png" alt="" />
											<span>72</span>
										</div>
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								<a href="http://ipnx.cn/faq/1796835653.html" title="Integrating CSS and JavaScript effectively with HTML5 structure." class="phphistorical_Version2_mids_img">
									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
										src="/static/imghw/default1.png" class="lazy"  data-src="https://img.php.cn/upload/article/001/253/068/175226046128038.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Integrating CSS and JavaScript effectively with HTML5 structure." />
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								<a href="http://ipnx.cn/faq/1796835653.html" title="Integrating CSS and JavaScript effectively with HTML5 structure." class="phphistorical_Version2_mids_title">Integrating CSS and JavaScript effectively with HTML5 structure.</a>
								<span id="wjcelcm34c"    class="Articlelist_txts_time">Jul 12, 2025 am	 03:01 AM</span>
								<p class="Articlelist_txts_p">HTML5, CSS and JavaScript should be efficiently combined with semantic tags, reasonable loading order and decoupling design. 1. Use HTML5 semantic tags, such as improving structural clarity and maintainability, which is conducive to SEO and barrier-free access; 2. CSS should be placed in, use external files and split by module to avoid inline styles and delayed loading problems; 3. JavaScript is recommended to be introduced in front, and use defer or async to load asynchronously to avoid blocking rendering; 4. Reduce strong dependence between the three, drive behavior through data-* attributes and class name control status, and improve collaboration efficiency through unified naming specifications. These methods can effectively optimize page performance and collaborate with teams.</p>
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									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
										src="/static/imghw/default1.png" class="lazy"  data-src="https://img.php.cn/upload/article/001/253/068/175226098195845.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Explaining the HTML5 `` vs `` elements." />
								</a>
								<a href="http://ipnx.cn/faq/1796835678.html" title="Explaining the HTML5 `` vs `` elements." class="phphistorical_Version2_mids_title">Explaining the HTML5 `` vs `` elements.</a>
								<span id="wjcelcm34c"    class="Articlelist_txts_time">Jul 12, 2025 am	 03:09 AM</span>
								<p class="Articlelist_txts_p">It is a block-level element, suitable for layout; it is an inline element, suitable for wrapping text content. 1. Exclusively occupy a line, width, height and margins can be set, which are often used in structural layout; 2. No line breaks, the size is determined by the content, and is suitable for local text styles or dynamic operations; 3. When choosing, it should be judged based on whether the content needs independent space; 4. It cannot be nested and is not suitable for layout; 5. Priority is given to the use of semantic labels to improve structural clarity and accessibility.</p>
							</div>
														<div   id="wjcelcm34c"   class="phphistorical_Version2_mids">
								<a href="http://ipnx.cn/faq/1796832585.html" title="Understanding HTML5 Media Source Extensions (MSE)" class="phphistorical_Version2_mids_img">
									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
										src="/static/imghw/default1.png" class="lazy"  data-src="https://img.php.cn/upload/article/001/253/068/175191311266895.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Understanding HTML5 Media Source Extensions (MSE)" />
								</a>
								<a href="http://ipnx.cn/faq/1796832585.html" title="Understanding HTML5 Media Source Extensions (MSE)" class="phphistorical_Version2_mids_title">Understanding HTML5 Media Source Extensions (MSE)</a>
								<span id="wjcelcm34c"    class="Articlelist_txts_time">Jul 08, 2025 am	 02:31 AM</span>
								<p class="Articlelist_txts_p">MSE (MediaSourceExtensions) is part of the W3C standard, allowing JavaScript to dynamically build media streams, thus enabling advanced video playback capabilities. It manages media sources through MediaSource, stores data from SourceBuffer, and represents the buffering time range through TimeRanges, allowing the browser to dynamically load and decode video clips. The process of using MSE includes: ① Create a MediaSource instance; ② Bind it to an element; ③ Add SourceBuffer to receive data in a specific format; ④ Get segmented data through fetch() and append it to the buffer. Common precautions include: ① Format compatibility issues; ② Time stamp pair</p>
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														<div   id="wjcelcm34c"   class="phphistorical_Version2_mids">
								<a href="http://ipnx.cn/faq/1796835672.html" title="What are the new input types available in HTML5 forms?" class="phphistorical_Version2_mids_img">
									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
										src="/static/imghw/default1.png" class="lazy"  data-src="https://img.php.cn/upload/article/001/253/068/175226085267246.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="What are the new input types available in HTML5 forms?" />
								</a>
								<a href="http://ipnx.cn/faq/1796835672.html" title="What are the new input types available in HTML5 forms?" class="phphistorical_Version2_mids_title">What are the new input types available in HTML5 forms?</a>
								<span id="wjcelcm34c"    class="Articlelist_txts_time">Jul 12, 2025 am	 03:07 AM</span>
								<p class="Articlelist_txts_p">HTML5introducednewinputtypesthatenhanceformfunctionalityanduserexperiencebyimprovingvalidation,UI,andmobilekeyboardlayouts.1.emailvalidatesemailaddressesandsupportsmultipleentries.2.urlchecksforvalidwebaddressesandtriggersURL-optimizedkeyboards.3.num</p>
							</div>
														<div   id="wjcelcm34c"   class="phphistorical_Version2_mids">
								<a href="http://ipnx.cn/faq/1796832574.html" title="Submitting Form Data Using New HTML5 Methods (FormData)" class="phphistorical_Version2_mids_img">
									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
										src="/static/imghw/default1.png" class="lazy"  data-src="https://img.php.cn/upload/article/001/253/068/175191288234525.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Submitting Form Data Using New HTML5 Methods (FormData)" />
								</a>
								<a href="http://ipnx.cn/faq/1796832574.html" title="Submitting Form Data Using New HTML5 Methods (FormData)" class="phphistorical_Version2_mids_title">Submitting Form Data Using New HTML5 Methods (FormData)</a>
								<span id="wjcelcm34c"    class="Articlelist_txts_time">Jul 08, 2025 am	 02:28 AM</span>
								<p class="Articlelist_txts_p">It is more convenient to submit form data using HTML5's FormData API. 1. It can automatically collect form fields with name attribute or manually add data; 2. It supports submission in multipart/form-data format through fetch or XMLHttpRequest, which is suitable for file upload; 3. When processing files, you only need to append the file to FormData and send a request; 4. Note that the same name field will be overwritten, and JSON conversion and no nesting structure need to be handled.</p>
							</div>
														<div   id="wjcelcm34c"   class="phphistorical_Version2_mids">
								<a href="http://ipnx.cn/faq/1796836233.html" title="How to access user's current location with the HTML5 Geolocation API?" class="phphistorical_Version2_mids_img">
									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
										src="/static/imghw/default1.png" class="lazy"  data-src="https://img.php.cn/upload/article/001/253/068/175234461263683.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to access user's current location with the HTML5 Geolocation API?" />
								</a>
								<a href="http://ipnx.cn/faq/1796836233.html" title="How to access user's current location with the HTML5 Geolocation API?" class="phphistorical_Version2_mids_title">How to access user's current location with the HTML5 Geolocation API?</a>
								<span id="wjcelcm34c"    class="Articlelist_txts_time">Jul 13, 2025 am	 02:23 AM</span>
								<p class="Articlelist_txts_p">To get the user's current location, use the HTML5 GeolocationAPI. This API provides information such as latitude and longitude after user authorization. The core method is getCurrentPosition(), which requires successful and error callbacks to be handled; at the same time, pay attention to the HTTPS prerequisite, user authorization mechanism and error code processing. ① Call getCurrentPosition to get the position once, and an error callback will be triggered if it fails; ② The user must authorize it, otherwise it cannot be obtained and may no longer be prompted; ③ Error processing should distinguish between rejection, timeout, location unavailable, etc.; ④ Enable high-precision, set timeout time, etc., and can be configured through the third parameter; ⑤ The online environment must use HTTPS, otherwise it may be restricted by the browser.</p>
							</div>
														<div   id="wjcelcm34c"   class="phphistorical_Version2_mids">
								<a href="http://ipnx.cn/faq/1796836359.html" title="Explain the `async` and `defer` attributes for scripts in HTML5." class="phphistorical_Version2_mids_img">
									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
										src="/static/imghw/default1.png" class="lazy"  data-src="https://img.php.cn/upload/article/001/253/068/175234716292556.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Explain the `async` and `defer` attributes for scripts in HTML5." />
								</a>
								<a href="http://ipnx.cn/faq/1796836359.html" title="Explain the `async` and `defer` attributes for scripts in HTML5." class="phphistorical_Version2_mids_title">Explain the `async` and `defer` attributes for scripts in HTML5.</a>
								<span id="wjcelcm34c"    class="Articlelist_txts_time">Jul 13, 2025 am	 03:06 AM</span>
								<p class="Articlelist_txts_p">The difference between async and defer is the execution timing of the script. async allows scripts to be downloaded in parallel and executed immediately after downloading, without guaranteeing the execution order; defer executes scripts in order after HTML parsing is completed. Both avoid blocking HTML parsing. Using async is suitable for standalone scripts such as analyzing code; defer is suitable for scenarios where you need to access the DOM or rely on other scripts.</p>
							</div>
														<div   id="wjcelcm34c"   class="phphistorical_Version2_mids">
								<a href="http://ipnx.cn/faq/1796832564.html" title="Displaying progress bars with the HTML5 `` tag." class="phphistorical_Version2_mids_img">
									<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
										src="/static/imghw/default1.png" class="lazy"  data-src="https://img.php.cn/upload/article/001/253/068/175191268285760.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Displaying progress bars with the HTML5 `` tag." />
								</a>
								<a href="http://ipnx.cn/faq/1796832564.html" title="Displaying progress bars with the HTML5 `` tag." class="phphistorical_Version2_mids_title">Displaying progress bars with the HTML5 `` tag.</a>
								<span id="wjcelcm34c"    class="Articlelist_txts_time">Jul 08, 2025 am	 02:24 AM</span>
								<p class="Articlelist_txts_p">HTML5 tags can directly implement web page progress bars. 1. The basic usage is to set the value and max attributes, such as displaying 30% progress; 2. If the progress is unknown, the value can be omitted and only set max, which means an uncertain state; 3. You can customize the style through CSS, and browser compatibility needs to be handled; 4. It is often used in scenarios such as uploading files, form progress, and game loading; 5. Pay attention to avoid using it when the task is completed too quickly, and consider the compatibility issues of the old version of IE.</p>
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