When I was browsing the web today, when I clicked on the web link, an error page appeared
This is something that happens often, but the page that pops up is different. For example:
Let’s learn about it together
1. What is 404?
404 is one of the standard response messages of HTTP, so how HTTP works: Look at the picture below
When the user When browsing the web, the server cannot provide information normally. For example, the user enters an incorrect link; or the server cannot respond and cannot find the reason. At this time, this 404 page will appear on the page. 404 is an information code, usually followed by a readable message fed back to the user: Not Found. It means that the page does not exist or is a deleted file.
2. Why is it called 404?
It is said that before the third technological revolution, the form of the Internet was a large central database, and this database was set up in Room 404. At that time, all requests were completed manually. If the file required by the requester was not found in the database, or the requester wrote the wrong file number, the user would get a return message: room404: file not found. Later, after the rise of the Internet, people became accustomed to using 404 as the error code for files not found on the server.
3. Why design a 404 page?
Browse the web and find a link you want, but when you click on it, it is an error page, and you immediately feel a bad rush~~Design a creative The 404 page can reduce user complaints. Therefore, a good website and a good 404 error page are a must.
There are many creative 404 pages on the Internet, and now 404 is even used for public welfare activities. By copying a piece of code into the 404 design code of the website, public welfare information can be spread through the Internet

HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.

HTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.

WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.

The role of HTML is to define the structure and content of a web page through tags and attributes. 1. HTML organizes content through tags such as , making it easy to read and understand. 2. Use semantic tags such as, etc. to enhance accessibility and SEO. 3. Optimizing HTML code can improve web page loading speed and user experience.

HTMLisaspecifictypeofcodefocusedonstructuringwebcontent,while"code"broadlyincludeslanguageslikeJavaScriptandPythonforfunctionality.1)HTMLdefineswebpagestructureusingtags.2)"Code"encompassesawiderrangeoflanguagesforlogicandinteract

HTML, CSS and JavaScript are the three pillars of web development. 1. HTML defines the web page structure and uses tags such as, etc. 2. CSS controls the web page style, using selectors and attributes such as color, font-size, etc. 3. JavaScript realizes dynamic effects and interaction, through event monitoring and DOM operations.

HTML defines the web structure, CSS is responsible for style and layout, and JavaScript gives dynamic interaction. The three perform their duties in web development and jointly build a colorful website.

HTML is suitable for beginners because it is simple and easy to learn and can quickly see results. 1) The learning curve of HTML is smooth and easy to get started. 2) Just master the basic tags to start creating web pages. 3) High flexibility and can be used in combination with CSS and JavaScript. 4) Rich learning resources and modern tools support the learning process.


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