Establishment and use of HTML subpages
With the development of the Internet and web page technology, more and more websites and applications need to use subpages to organize and management information. HTML subpages can make a website more modular and maintainable while providing a better user experience. This article will explain how to create subpages in HTML and provide specific code examples.
1. Create a subpage
- First, we need to create a parent page. The parent page is usually a main HTML file that loads and displays child pages. In the parent page, we can use the
<iframe></iframe>element to embed the child page. The sample code is as follows:
<!DOCTYPE html>
<html>
<head>
<title>父页面</title>
</head>
<body>
<h1 id="这是父页面">这是父页面</h1>
<iframe src="子页面.html"></iframe>
</body>
</html>- Next, we need to create subpages. A subpage is usually a separate HTML file that contains specific content and functionality. In subpages, we can write arbitrary HTML code. The sample code is as follows:
<!DOCTYPE html>
<html>
<head>
<title>子页面</title>
</head>
<body>
<h2 id="这是子页面">这是子页面</h2>
<p>这是子页面的内容。</p>
</body>
</html>2. Using subpages
- When we open the parent page in the browser, the subpage will be loaded and displayed at the same time. In the parent page, the
srcattribute of the<iframe></iframe>element specifies the file path of the child page. The browser will automatically load the subpage based on the file path and embed it into the parent page. The sample code is as follows:
<!DOCTYPE html>
<html>
<head>
<title>父页面</title>
</head>
<body>
<h1 id="这是父页面">这是父页面</h1>
<iframe src="子页面.html"></iframe>
</body>
</html>- If we need to operate or control the sub-page in the parent page, we can use JavaScript to achieve it. Through the
contentWindowattribute of the<iframe></iframe>element, we can obtain the window object of the subpage. Then, we can use the window object of the subpage to perform various operations, such as modifying the content of the subpage, calling functions of the subpage, etc. The sample code is as follows:
<!DOCTYPE html>
<html>
<head>
<title>父页面</title>
<script>
function changeContent() {
var iframe = document.getElementsByTagName('iframe')[0];
var childWindow = iframe.contentWindow;
var childDocument = childWindow.document;
var childHeading = childDocument.getElementsByTagName('h2')[0];
childHeading.innerText = '子页面内容已修改';
}
</script>
</head>
<body>
<h1 id="这是父页面">这是父页面</h1>
<iframe src="子页面.html"></iframe>
<button onclick="changeContent()">修改子页面内容</button>
</body>
</html>The above code defines a JavaScript function named changeContent(), which will obtain the <h2 id="in-the-sub-page-element-and-modify-its-text-content-Then-add-a-button-to-the-parent-page-and-bind-the-function-through-the"># in the sub-page. ## element and modify its text content. Then, add a button to the parent page and bind the function through the </h2>onclick event. When the button is clicked, the parent page will call the changeContent() function to modify the content of the child page.
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