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Complex javascript window frame analysis_javascript skills

Complex javascript window frame analysis_javascript skills

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May 16, 2016 pm 03:14 PM

javascript

What is window framing? 

Window framing is to divide a browser document window into multiple windows. Each window can display an independent web page file, and each frame (i.e. page) has its own URL.

How to create a frame window?

Frames are usually created using the and tags. But in HTML 4, the tag can also be used to create "inline frames" within the document. As far as JavaScript is concerned, <iframe> creates the same frame as <frameset> and <frame>. </p> <p> In HTML, use <frameset> (split window tag) to split the window. The status of <frameset> in a multi-window page is equivalent to the status of <body> in an ordinary single-window page. In the page Use <frameset>...</frameset> to mark the starting and ending positions of the main part of the page. Furthermore, the <frameset> tag determines how the windows are divided, as well as the position and size of each window. Its basic grammatical structure is as follows: </p> <div class="jb51code"> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'> <frameset cols=n rows=n frameborder=yes|no border=n bordercolor=#n framespacing=n></frameset> </pre><div class="contentsignin">Copy after login</div></div> </div> <p>cols and rows: are the two parameters that determine how the page is divided. Use cols to split the left and right windows, and the left and right width of each frame is expressed as a percentage of the window width. For example: cols="30%,40%,*" means that it is divided into three windows in the horizontal direction, and the percentages of the total width of each are 30%, 40% and 30%. Among them, "*" represents the remaining part, that is to say, the width of the small window corresponding to "*" is the remaining width. Use rows to split the upper and lower windows, and also use the percentage setting method. </p> <p>　<strong>frameborder: </strong> specifies whether each sub-window (ye) should add a border (no); if a frame is added, use the border parameter to specify the width of the border, and bordercolor to specify the color of the border. </p> <p>　<strong>framespacing: </strong> is used to set the spacing between sub-windows. The default value is 0. </p> <p> After dividing the window using the <frameset> tag, the attributes of each window are defined using the HTML <frame> tag, so the <frameset> tag must contain the <frame> tag for definition Properties of each sub-window. Its syntax is as follows: </p> <div class="jb51code"> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'> <frame align=left|center|right|top|bottomv name=framename src＝url noresize scrolling＝yes|on|auto frameborder=yes|no bordercolor＝＃n marginheight=n marginwidth＝n></frame> </pre><div class="contentsignin">Copy after login</div></div> </div> <p>　<strong>align: </strong> Set the position of the sub-window to the left (left), right (right), center (center), top (top) or bottom (bottom). </p> <p>　<strong>name: </strong> is used to specify the name of the sub-window, and src is used to specify the HTML page address corresponding to the sub-window. </p> <p>　<strong>noresize: </strong> is for the user. When the <frame> tag contains this parameter, the user cannot use the mouse to adjust or modify the size of each window. </p> <p>　<strong>scrolling: </strong>Set whether the sub-window requires scroll bars. When scrolling=no, scroll bars are not required. When scrolling=yes, scroll bars are required. When scrolling=auoto, scroll bars are automatically set according to the actual situation. </p> <p>　<strong>frameborder and bordercolor: </strong> is used to set the border and border color of the sub-window. But the object is limited to sub-windows marked with <frame>. </p> <p>　<strong>marginheight and marginwidth: </strong> are used to set the width of the upper and lower edges and the left and right edges of the sub-window respectively. </p> <p> For example: </p> <div class="jb51code"> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'> <frameset cols="50%,*,25%"> <frame src="http://www.baidu.com" noresize="noresize" /> <frame src="http://www.baidu.com" /> <frame src="http://www.baidu.com" /> </frameset></pre><div class="contentsignin">Copy after login</div></div> </div> <p><strong>What is the relationship between frame windows in JavaScript? <br /> </strong> Any frame of a window can reference other frames through the <span style="color: #800000"><strong>top, frames</strong><span style="color: #000000"> and </span><strong>parent</strong></span> attributes. </p> <p> JavaScript code within any window or frame can reference its own window or frame as window or self. </p> <p>Each window has frames attribute. This property refers to an array of Window objects, where each element represents a frame contained in this window (if a window does not have any frames, then the frames[] array is empty and frames.length is 0). In this way, the window You can use frames[0] to reference its first frame, frames[1] to reference its second frame, and so on. </p> <p>Each window also contains a parent attribute, which refers to the Window object containing this window. This way, the first frame in the window can reference its sibling frames, i.e.: </p> <div class="jb51code"> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'> 　parent.frames[1]</pre><div class="contentsignin">Copy after login</div></div> </div> <p>If a window is a top-level window rather than a frame, then the parent attribute refers to the window itself: </p> <div class="jb51code"> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'> parent==self;</pre><div class="contentsignin">Copy after login</div></div> </div> <p>If a frame is contained within another frame, which is contained within a top-level window, then the frame can use parent.parent to reference the top-level window. </p> <p><span style="color: #800000"><strong>Note: <br> </strong></span>Frames cannot coexist with body tags and content </p> <p> Framing is not conducive to search engine optimization. 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This article will introduce how to use WebSocket and JavaScript to implement an online speech recognition system.</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/633480.html" title="WebSocket and JavaScript: key technologies for implementing real-time monitoring systems" 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/000/465/014/170280543760094.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="WebSocket and JavaScript: key technologies for implementing real-time monitoring systems" /> </a> <a href="https://www.php.cn/faq/633480.html" title="WebSocket and JavaScript: key technologies for implementing real-time monitoring systems" class="phphistorical_Version2_mids_title">WebSocket and JavaScript: key technologies for implementing real-time monitoring systems</a> <span class="Articlelist_txts_time">Dec 17, 2023 pm 05:30 PM</span> <p class="Articlelist_txts_p">WebSocket and JavaScript: Key technologies for realizing real-time monitoring systems Introduction: With the rapid development of Internet technology, real-time monitoring systems have been widely used in various fields. One of the key technologies to achieve real-time monitoring is the combination of WebSocket and JavaScript. This article will introduce the application of WebSocket and JavaScript in real-time monitoring systems, give code examples, and explain their implementation principles in detail. 1. WebSocket technology</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/633311.html" title="How to implement an online reservation system using WebSocket and JavaScript" 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/000/887/227/170277714783917.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to implement an online reservation system using WebSocket and JavaScript" /> </a> <a href="https://www.php.cn/faq/633311.html" title="How to implement an online reservation system using WebSocket and JavaScript" class="phphistorical_Version2_mids_title">How to implement an online reservation system using WebSocket and JavaScript</a> <span class="Articlelist_txts_time">Dec 17, 2023 am 09:39 AM</span> <p class="Articlelist_txts_p">How to use WebSocket and JavaScript to implement an online reservation system. In today's digital era, more and more businesses and services need to provide online reservation functions. It is crucial to implement an efficient and real-time online reservation system. This article will introduce how to use WebSocket and JavaScript to implement an online reservation system, and provide specific code examples. 1. What is WebSocket? WebSocket is a full-duplex method on a single TCP connection.</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/633365.html" title="How to use JavaScript and WebSocket to implement a real-time online ordering system" 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/000/887/227/170278617570921.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to use JavaScript and WebSocket to implement a real-time online ordering system" /> </a> <a href="https://www.php.cn/faq/633365.html" title="How to use JavaScript and WebSocket to implement a real-time online ordering system" class="phphistorical_Version2_mids_title">How to use JavaScript and WebSocket to implement a real-time online ordering system</a> <span class="Articlelist_txts_time">Dec 17, 2023 pm 12:09 PM</span> <p class="Articlelist_txts_p">Introduction to how to use JavaScript and WebSocket to implement a real-time online ordering system: With the popularity of the Internet and the advancement of technology, more and more restaurants have begun to provide online ordering services. In order to implement a real-time online ordering system, we can use JavaScript and WebSocket technology. WebSocket is a full-duplex communication protocol based on the TCP protocol, which can realize real-time two-way communication between the client and the server. In the real-time online ordering system, when the user selects dishes and places an order</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/633476.html" title="JavaScript and WebSocket: Building an efficient real-time weather forecasting system" 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/000/465/014/170280442251580.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="JavaScript and WebSocket: Building an efficient real-time weather forecasting system" /> </a> <a href="https://www.php.cn/faq/633476.html" title="JavaScript and WebSocket: Building an efficient real-time weather forecasting system" class="phphistorical_Version2_mids_title">JavaScript and WebSocket: Building an efficient real-time weather forecasting system</a> <span class="Articlelist_txts_time">Dec 17, 2023 pm 05:13 PM</span> <p class="Articlelist_txts_p">JavaScript and WebSocket: Building an efficient real-time weather forecast system Introduction: Today, the accuracy of weather forecasts is of great significance to daily life and decision-making. As technology develops, we can provide more accurate and reliable weather forecasts by obtaining weather data in real time. In this article, we will learn how to use JavaScript and WebSocket technology to build an efficient real-time weather forecast system. This article will demonstrate the implementation process through specific code examples. We</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/642543.html" title="Simple JavaScript Tutorial: How to Get HTTP Status Code" 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/000/887/227/170444932683164.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Simple JavaScript Tutorial: How to Get HTTP Status Code" /> </a> <a href="https://www.php.cn/faq/642543.html" title="Simple JavaScript Tutorial: How to Get HTTP Status Code" class="phphistorical_Version2_mids_title">Simple JavaScript Tutorial: How to Get HTTP Status Code</a> <span class="Articlelist_txts_time">Jan 05, 2024 pm 06:08 PM</span> <p class="Articlelist_txts_p">JavaScript tutorial: How to get HTTP status code, specific code examples are required. Preface: In web development, data interaction with the server is often involved. When communicating with the server, we often need to obtain the returned HTTP status code to determine whether the operation is successful, and perform corresponding processing based on different status codes. This article will teach you how to use JavaScript to obtain HTTP status codes and provide some practical code examples. Using XMLHttpRequest</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/630681.html" title="How to use insertBefore in javascript" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to use insertBefore in javascript" /> </a> <a href="https://www.php.cn/faq/630681.html" title="How to use insertBefore in javascript" class="phphistorical_Version2_mids_title">How to use insertBefore in javascript</a> <span class="Articlelist_txts_time">Nov 24, 2023 am 11:56 AM</span> <p class="Articlelist_txts_p">Usage: In JavaScript, the insertBefore() method is used to insert a new node in the DOM tree. This method requires two parameters: the new node to be inserted and the reference node (that is, the node where the new node will be inserted).</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/faq/642230.html" title="How to get HTTP status code in JavaScript the easy way" 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/000/000/164/170443303819225.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to get HTTP status code in JavaScript the easy way" /> </a> <a href="https://www.php.cn/faq/642230.html" title="How to get HTTP status code in JavaScript the easy way" class="phphistorical_Version2_mids_title">How to get HTTP status code in JavaScript the easy way</a> <span class="Articlelist_txts_time">Jan 05, 2024 pm 01:37 PM</span> <p class="Articlelist_txts_p">Introduction to the method of obtaining HTTP status code in JavaScript: In front-end development, we often need to deal with the interaction with the back-end interface, and HTTP status code is a very important part of it. Understanding and obtaining HTTP status codes helps us better handle the data returned by the interface. This article will introduce how to use JavaScript to obtain HTTP status codes and provide specific code examples. 1. What is HTTP status code? HTTP status code means that when the browser initiates a request to the server, the service</p> </div> </div> <a href="https://www.php.cn/web-designer.html" class="phpgenera_Details_mainL4_botton"> <span>See all articles</span> <img src="/static/imghw/down_right.png" alt="" /> </a> </div> </div> </div> </main> <footer> <div class="footer"> <div class="footertop"> <img src="/static/imghw/logo.png" alt=""> <p>Public welfare online PHP training，Help PHP learners grow quickly！</p> </div> <div class="footermid"> <a href="https://www.php.cn/about/us.html">About us</a> <a href="https://www.php.cn/about/disclaimer.html">Disclaimer</a> <a href="https://www.php.cn/update/article_0_1.html">Sitemap</a> </div> <div class="footerbottom"> <p> © php.cn All rights reserved </p> </div> </div> </footer> <input type="hidden" id="verifycode" value="/captcha.html"> <script>layui.use(['element', 'carousel'], function () {var element = layui.element;$ = layui.jquery;var carousel = layui.carousel;carousel.render({elem: '#test1', width: '100%', height: '330px', arrow: 'always'});$.getScript('/static/js/jquery.lazyload.min.js', function () {$("img").lazyload({placeholder: "/static/images/load.jpg", effect: "fadeIn", threshold: 200, skip_invisible: false});});});</script> <script src="/static/js/common_new.js"></script> <script type="text/javascript" src="/static/js/jquery.cookie.js?1744360078"></script> <script src="https://vdse.bdstatic.com//search-video.v1.min.js"></script> <link rel='stylesheet' id='_main-css' href='/static/css/viewer.min.css?2' type='text/css' media='all' /> <script type='text/javascript' src='/static/js/viewer.min.js?1'></script> <script type='text/javascript' src='/static/js/jquery-viewer.min.js'></script> <script type="text/javascript" src="/static/js/global.min.js?5.5.53"></script> <script> var _paq = window._paq = window._paq || []; /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function () { var u = "https://tongji.php.cn/"; _paq.push(['setTrackerUrl', u + 'matomo.php']); _paq.push(['setSiteId', '9']); var d = document, g = d.createElement('script'), s = d.getElementsByTagName('script')[0]; g.async = true; g.src = u + 'matomo.js'; s.parentNode.insertBefore(g, s); })(); </script> <script> // top layui.use(function () { var util = layui.util; util.fixbar({ on: { mouseenter: function (type) { layer.tips(type, this, { tips: 4, fixed: true, }); }, mouseleave: function (type) { layer.closeAll("tips"); }, }, }); }); document.addEventListener("DOMContentLoaded", (event) => { // 定义一个函数来处理滚动链接的点击事件 function setupScrollLink(scrollLinkId, targetElementId) { const scrollLink = document.getElementById(scrollLinkId); const targetElement = document.getElementById(targetElementId); if (scrollLink && targetElement) { scrollLink.addEventListener("click", (e) => { e.preventDefault(); // 阻止默认链接行为 targetElement.scrollIntoView({ behavior: "smooth" }); // 平滑滚动到目标元素 }); } else { console.warn( `Either scroll link with ID '${scrollLinkId}' or target element with ID '${targetElementId}' not found.` ); } } // 使用该函数设置多个滚动链接 setupScrollLink("Article_Details_main1L2s_1", "article_main_title1"); setupScrollLink("Article_Details_main1L2s_2", "article_main_title2"); setupScrollLink("Article_Details_main1L2s_3", "article_main_title3"); setupScrollLink("Article_Details_main1L2s_4", "article_main_title4"); setupScrollLink("Article_Details_main1L2s_5", "article_main_title5"); setupScrollLink("Article_Details_main1L2s_6", "article_main_title6"); // 可以继续添加更多的滚动链接设置 }); window.addEventListener("scroll", function () { var fixedElement = document.getElementById("Article_Details_main1Lmain"); var scrollTop = window.scrollY || document.documentElement.scrollTop; // 兼容不同浏览器 var clientHeight = window.innerHeight || document.documentElement.clientHeight; // 视口高度 var scrollHeight = document.documentElement.scrollHeight; // 页面总高度 // 计算距离底部的距离 var distanceToBottom = scrollHeight - scrollTop - clientHeight; // 当距离底部小于或等于300px时，取消固定定位 if (distanceToBottom <= 980) { fixedElement.classList.remove("Article_Details_main1Lmain"); fixedElement.classList.add("Article_Details_main1Lmain_relative"); } else { // 否则，保持固定定位 fixedElement.classList.remove("Article_Details_main1Lmain_relative"); fixedElement.classList.add("Article_Details_main1Lmain"); } }); </script> </body> </html>