Course Introduction：Form verification can be implemented through built-in HTML5 properties. 1. Use required to ensure the required items; 2. Restrict input formats such as mailbox and zip code through type and pattern; 3. Use min, max, minlength, and maxlength to control the range and length of the numerical value. These methods can improve the front-end experience without JavaScript, but key verification still needs to be completed with the back-end.
2025-07-14 comment 0 193
Course Introduction：Server-SentEvents (SSE) is a technology in HTML5 used to implement efficient one-way communication between servers and clients, suitable for notification push and data updates. It is based on the HTTP protocol and supports automatic reconnection. The message format is simple. The front-end listens to events through EventSource. The back-end needs to set the text/event-stream type and keep the connection. Common problems include connection timeout, message loss and concurrency restrictions, which are suitable for lightweight real-time scenarios.
2025-07-08 comment 0 200
Course Introduction：WebSocket is a full-duplex communication protocol provided by HTML5, which allows the browser to establish a persistent connection between the server and realizes efficient real-time data transmission. Its core advantage is that it does not require repeated connection establishment, reduces latency and improves efficiency. When building real-time functions, the front-end creates WebSocket instances through JavaScript and listens to events, and the back-end can use languages ??such as Node.js, Python or Java to process connections and message broadcasts. Common application scenarios include chat applications, online collaborative editing, real-time data display and notification systems. During development, you need to pay attention to cross-domain issues, connection maintenance mechanism, compatibility, back-end concurrent pressure and security details, and combine Redis or Nginx to improve performance and expansion if necessary.
2025-07-04 comment 0 229
Course Introduction：Form verification can be achieved through built-in HTML5 features, without relying on JavaScript. Use required, min/max, and pattern attributes to ensure the legality of input; use the browser's default error prompts or custom content; improve the interactive experience through the CSS's :valid/:invalid pseudo-class; at the same time, it is necessary to pay attention to compatibility, and combine back-end verification and testing to ensure cross-browser compatibility.
2025-07-04 comment 0 486
Course Introduction：The input type improves form experience and verification efficiency. HTML5 provides various input types such as text, password, email, etc., which are adapted to different scenarios such as username, password hiding, and email verification; supports number limited number input, date selection, checkbox multiple selection, radio single selection, file upload, range slider bar, color color selection; combines required, min/max, and pattern to achieve front-end verification to reduce the burden on the back-end; mobile terminals automatically adapt to keyboard types such as email display @ symbols, tel calls numeric keyboards; provide input-able option list, readonly lock fields, hidden through datalist
2025-07-06 comment 0 569
Course Elementary 13768
Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.
Course Elementary 82276
Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).
Course Elementary 13141
Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.
Course Elementary 24589
Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.
Course Elementary 27445
Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.
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