Course Introduction：在网页开发中，创建下拉列表主要使用HTML的和标签。 1. Basic structure: Use multiple packages to define options; 2. Default selection: Set by adding selected attributes; 3. Grouping options: Used for classification display; 4. Notes: The name attribute cannot be omitted, CSS can be used to beautify styles, and multiple attributes are added when multiple selections.

2025-07-12 comment 0  721

Course Introduction：本文将介绍如何使用 JavaScript 将包含用户已填写表单的网页保存为 HTML 文件。 The core idea is to set the value attribute of the form input box to the current input value before downloading, then get the HTML structure containing the form, encode it as a data URL, and finally trigger the download by creating a hidden tag.

2025-08-26 comment 0  732

Course Introduction：Use Playwright in Vue projects mainly for end-to-end (E2E) testing. 1.安装Playwright可通过npm或yarn执行命令并选择默认配置开始；2.编写测试时，将测试文件放在tests/目录，利用page.goto()、click()和expect()等API验证页面交互；3.对于VueRouter和Vuex，Playwright能模拟真实行为，可测试路由跳转和状态变化，并通过拦截API请求提高测试稳定性；4.调试时可使用--headed参数或playwrightshow-trace查看执行过

2025-07-06 comment 0  568

Course Introduction：

2024-12-18 comment 0  719

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  745

Course Elementary  13955

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  82523

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  13294

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  24773

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  27598

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.