


Backend Coders Talk About Frontend (HTML) Lesson 1: HTML Overview_html/css_WEB-ITnose
1. What is HTML?
HTML is not a programming language, it is a markup language used to describe web documents (page structures);
HTML refers to Hyper Text Markup Language (Hyper Text Markup Language), so it is called Hypertext Markup Language is because the text contains so-called "hyperlink" points. ;
HTML stipulates its own grammatical rules to express richer meanings than "text", such as pictures, tables, links, etc. Browser (IE, FireFox, etc.) software knows the syntax of the HTML language and can be used to view HTML documents. Currently, most web pages on the Internet are written using HTML.
2. What does HTML look like?
To put it simply, the syntax of HTML is to add tags (Tag) to the text to indicate the meaning of the text, so that users (people or programs) can better understand the text.
The following is the simplest HTML document:
<html>
<head>
<title>第一个Html文档</title>
</head>
<body>
欢迎访问<a href="http://hanzhaoxin.cnblogs.com/">我的博客</a>!
</body>
</html>
All HTML documents should have a element. The element can contain two parts:
and .The
element is used to contain general information about the entire document, such as the title of the document (theThe specific content of the document must be placed in the
3. What content can an HTML document contain?
Through different tags, HTML documents can contain different content, such as text, links, pictures, lists, tables, forms, frames, etc.
Pictures: Pictures are used to make the page more beautiful or provide more information.
List: A list is used to illustrate that a series of items are related to each other.
Table: A table is a form of organizing data together by rows and columns. Many people also use tables for page layout.
Form: Forms are usually composed of text input boxes, buttons, multi-select boxes, radio buttons, drop-down lists, etc., making HTML pages more interactive.
Frame: Frame allows a page to contain other pages.
4. What concepts can I talk about HTML?
Document: HTML document is commonly known as a web page.
Tags: Keywords surrounded by angle brackets we become tags. Usually HTML tags appear in pairs, such as: , .
Element: We call matching tag pairs and the content they surround as elements. That is (element = start tag content end tag). For example: My blog.
Attributes: Those contents in the start tag that appear in the form of name/value pairs are called attributes. As in the above example: href="http://hanzhaoxin.cnblogs.com/". (href is the attribute name, "http://hanzhaoxin.cnblogs.com/" is the attribute value).

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.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

SublimeText3 Chinese version
Chinese version, very easy to use

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Atom editor mac version download
The most popular open source editor
