Course Introduction：Verifying the validity of form fields can be achieved through 1. HTML5 built-in verification; 2. Manually write verification logic; 3. Real-time feedback combined with event listening. HTML5 provides required, type and other properties to be combined with checkValidity() method to achieve basic verification; complex rules require custom functions, such as password consistency check and regular expression matching mailbox and password format; real-time error prompts are achieved through input or blur event listening, and at the same time, pay attention to preventing the default submission behavior and being compatible with old browsers.
2025-06-25 comment 0 239
Course Introduction：When there is no backend server, HTML form submission can still be processed through front-end technology or third-party services. Specific methods include: 1. Use JavaScript to intercept form submissions to achieve input verification and user feedback, but the data will not be persisted; 2. Use third-party serverless form services such as Formspree to collect data and provide email notification and redirection functions; 3. Use localStorage to store temporary client data, which is suitable for saving user preferences or managing single-page application status, but is not suitable for long-term storage of sensitive information.
2025-07-09 comment 0 216
Course Introduction：Using HTML5 tags well is actually to set the base path of resources in the page. Although it is not conspicuous, once it is used incorrectly, there may be problems with the links and resource references of the entire page. The basic function of tags The function of tags is to provide a basic address for all relative URLs on the page. It will affect the behavior of all relative paths in the page, including: hyperlink() picture path() external resource loading (such as CSS, JS files) form submission path, etc. That is, as long as you use the relative path, it will be parsed based on the set address. It is only effective if it is placed in it, and there can only be one per page. The browser will prioritize reading this tag and then decide how to load subsequent resources. If you write it
2025-07-15 comment 0 789
Course Introduction：The key to using HTML templates is to understand the structure and modify the key points. First, understand that the template consists of index.html, CSS, JS files and picture folders. Checking the code structure helps position the modification area; second, when replacing the content, find the correct position, including title, paragraph, link, image path, etc., and pay attention to the consistency of the resource directory; then adjust the style by modifying the CSS class name or attribute, and realize style switching without rewriting the code; finally, test the web page function and check whether the link jump, image loading, form submission and mobile display are normal, and ensure that there are no path errors or label omissions before going online to deploy.
2025-07-07 comment 0 982
Course Introduction：SqlParameter Parameters.Add vs. AddWithValue: Choosing the Best MethodWhen working with SQL commands, you may encounter the need to add...
2025-01-10 comment 0 674
Course Elementary 13779
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 82289
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 13148
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 24595
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 27455
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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