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Course Introduction：HTML5 lets you draw graphics straight into your web page using the element and its related JavaScript API. In this post, I’m going to introduce you to jCanvas, a free and open source jQuery-based library for the HTML5 Canvas API. If you d

2025-02-18 comment 0  574

Course Introduction：The pattern attribute of HTML5 is verified by regular expressions. Common scenarios include: 1. The password requires at least uppercase and uppercase letters, numbers and the length is no less than 8 digits, pattern="(?=.\d)(?=.[a-z])(?=.*[A-Z]).{8,}"; 2. Phone number such as 123-456-7890 format, pattern="\d{3}-\d{3}-\d{4}" or more flexible; 3. Email address restricts domain name suffix, pattern="[a-zA-Z0-9._% -] @[a-zA-Z0-9.-] .[a-zA-Z

2025-07-07 comment 0  414

Course Introduction：SVG quadratic Bezier curve: a sharp tool to draw smooth edges This article will explore how to draw smooth edges using quadratic Bezier curves in HTML5 SVG. The quadratic Bezier curve is defined by the Q instruction in the SVG path d attribute, with a starting point and an end point, and the curve is bent through a single control point. Key points: The Q instruction in the SVG path d attribute is used to define a quadratic Bezier curve, which contains three coordinates: the start point, the control point and the end point. Use the lowercase letter q to specify relative coordinates, while the T and t instructions can be used to connect multiple curves. The system will automatically infer control points based on the previous curve to ensure smooth transitions of the curve. While encoding and visualizing quadratic Bezier curves can be challenging, it is possible to use

2025-02-10 comment 0  1146

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 Introduction：In Dave The Diver, there are some creatures that are not easy to catch. Or, catch alive that is. The spider crab is one of those very species, making it seem like the only way to bring these crustaceans back up to land is to viciously crack them up w

2025-01-10 comment 0  819

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  82293

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.