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Course Introduction：Bootstrap provides form verification capabilities that can be added to projects by importing CSS and JavaScript. Create a form element and force the fields or pattern attributes to be filled in with the required attribute to verify a specific format. You can also customize the verification message. When a form is submitted, Bootstrap automatically performs a check, displays an error message and blocks submission. FAQ: Disable verification removes the required and pattern attributes; the checkValidity() method can be manually triggered; the validity attribute can obtain the verification result.

2025-04-07 comment 0  1085

Course Introduction：To correctly use the required attribute of HTML, first add this attribute to the supported form elements such as , to achieve basic verification; secondly, you can customize the prompt content through JavaScript; finally, combine CSS to improve user visual feedback. 1. Add the required attribute to the input field to realize automatic browser verification; 2. Use the setCustomValidity() method to customize the prompt information; 3. Use CSS pseudo-classes and pseudo-elements to style the required items to enhance the user experience.

2025-07-04 comment 0  814

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：Form verification can improve efficiency through HTML5 native mechanism. 1. Use the required attribute to ensure the required fields; 2. Use the input type (such as email, number) and pattern attributes to verify the data format; 3. Use the setCustomValidity() method and CSS to adjust the error prompts and styles to optimize the user experience.

2025-07-14 comment 0  807

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  13142

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  27446

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.