


[Techniques] Tips for solving the problem of floating and blocking content_html/css_WEB-ITnose
Introduction
In today’s front-end pages, especially on mobile devices, it is often necessary to suspend the
The "Reply Topic" module follows the floating of the page and remains suspended at the bottom of the page. The code structure is as follows.
1 ...2 <section class='footer'>3 <div class='reply-topic'>回复主题</div>4 </section>5 ...
To achieve such a function, of course, we use position:fixed. However, there is a bug in using position: fixed. Take the floating
The left side above is the problematic display, and the right side is the normal display. So, how to solve this problem? Here, I would like to put forward three of my opinions, hoping to find a better way.
When sliding to the bottom of the page content, just change the fixed positioning that would originally break away from the document flow to the relative positioning that does not break away from the document flow.
Using scripts to solve problems is the most arduous method. Try not to use scripts if it can be solved with css, but it is still a method.
Method 2. Add padding-bottom to the body
1 //滚动条在Y轴上的滚动距离 2 function getScrollTop(){ 3 return document.body.scrollTop; 4 } 5 //文档的总高度 6 function getScrollHeight(){ 7 8 return document.body.clientHeight; 9 }10 //浏览器视口的高度11 function getWindowHeight(){12 var windowHeight = 0;13 if(document.compatMode == "CSS1Compat")14 {15 windowHeight = document.documentElement.clientHeight;16 }17 else18 {19 windowHeight = document.body.clientHeight;20 }21 return windowHeight;22 }23 24 //滑动监听25 window.onscroll = function(){26 //滑到底部时footer定于最下方,假定<footer>的height为6027 if((getScrollHeight() - getScrollTop() - getWindowHeight()) > 61) 28 $('.footer').css('position','fixed'); 29 else30 $('.footer').css('position','relative');31 }
Add html
tag The previous padding-bottom attribute, so that the content of the normal document flow will have a distance set by padding-bottom from the bottom of the body.The disadvantage is that considering the reuse of modules and the frequent need to merge css files after the project is launched, when other pages do not need this floating block, it will cause a burden on pages that do not require
Method three. Add same-level placeholders
1 //假定<footer>的高度为60px2 body 3 {4 padding-bottom: 60px; 5 }
Personally I think this method The most practical way is to wrap a layer of div outside the

Boolean attributes are special attributes in HTML that are activated without a value. 1. The Boolean attribute controls the behavior of the element by whether it exists or not, such as disabled disable the input box. 2.Their working principle is to change element behavior according to the existence of attributes when the browser parses. 3. The basic usage is to directly add attributes, and the advanced usage can be dynamically controlled through JavaScript. 4. Common mistakes are mistakenly thinking that values need to be set, and the correct writing method should be concise. 5. The best practice is to keep the code concise and use Boolean properties reasonably to optimize web page performance and user experience.

HTML code can be cleaner with online validators, integrated tools and automated processes. 1) Use W3CMarkupValidationService to verify HTML code online. 2) Install and configure HTMLHint extension in VisualStudioCode for real-time verification. 3) Use HTMLTidy to automatically verify and clean HTML files in the construction process.

HTML, CSS and JavaScript are the core technologies for building modern web pages: 1. HTML defines the web page structure, 2. CSS is responsible for the appearance of the web page, 3. JavaScript provides web page dynamics and interactivity, and they work together to create a website with a good user experience.

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.


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