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Course Introduction：Client form validation is crucial – it saves time and bandwidth and provides more options to point out where users make mistakes when filling out forms. That being said, this doesn't mean you don't need server-side verification. Users visiting your website may have used an old browser or disabled JavaScript, which will break client-only verification. Client and server-side verification complement each other, so they really should not be used independently. Why is client verification important? There are two good reasons to use client authentication: It is a quick way to verify: if something goes wrong, an alert will be triggered when the form is submitted. You can safely display only one error at a time and focus on the wrong fields to help ensure that the user correctly fills out all the detailed letters you need

2025-03-08 comment 0  938

Course Introduction：To create a form with a good user experience in HTML, you need to pay attention to the following key points: 1. Use tags to define the form structure and set action and method attributes; 2. Add common input fields such as text boxes, password boxes, radio buttons, etc.; 3. Improve user experience through label tags, required attributes, and appropriate input types; 4. After submission, the data must be processed by the backend, and tools can be used to simulate it during testing. The infrastructure of the form is wrapped by a tag, and the commonly used method is POST to ensure security; each input field should be paired with label and set the correct name and id attributes; details include required verification, mobile keyboard adaptation and data format verification; processing after submission is based on

2025-07-05 comment 0  344

Course Introduction：HTML5 is the introductory foundation for front-end development, suitable for beginners to get started quickly. 1. The basic structure includes four key tags; 2. Commonly used semantic tags such as, ,,,, and can improve the clarity of web page structure; 3. Enhanced form function, supports multiple input types such as text, email, password, number, etc., and has verification attributes; 4. Natively support multimedia, and easily embed audio and video content with tags.

2025-07-28 comment 0  344

Course Introduction：PHP has five most commonly used hyperglobal variables, namely $\_GET, $\_POST, $\_SERVER, $\_SESSION, and $\_COOKIE. ①$\_GET is used to obtain parameters in the URL, suitable for non-sensitive data transmission such as paging and filtering, but attention should be paid to input verification; ②$\_POST is used to receive sensitive data submitted by the form, such as login information, and it is necessary to prevent SQL injection and XSS attacks; ③$\_SERVER provides information about the server and script execution environment, such as the current script name, user IP and request method, and check whether the key exists before use; ④$\_SESSION is used to maintain user status across pages, and session\_st must be called first when using it.

2025-07-18 comment 0  224

Course Introduction：The article introduces the process of registering a Binance account in areas where cryptocurrency trading is allowed to be legally carried out. Preparations include smartphones or computers, stable networks, commonly used emails and mobile phone numbers that can receive text messages. Registration is divided into computer and mobile terminal: the computer terminal needs to visit the official website, select the email address or mobile number to register, set a password, agree to the terms and conditions before completing the registration and verification; download the App first on the mobile terminal, and the subsequent steps are similar to the computer terminal. Some regions may need to upload identification documents to complete identity verification.

2025-03-04 comment 0  973

Course Elementary  13821

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  82357

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  13174

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  24625

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  27484

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.