Course Introduction：Using CSS advanced selectors and combiners enables precise control of styles and reduces redundant code. The attribute selector matches elements through attribute values, such as input[type="text"], only selects the text input box; the pseudo-class selector filters elements according to state or position, such as tr:nth-child(even) to set the background color of even rows; the combiner connects multiple selectors, such as h2 p selects the first p element immediately adjacent to h2; the rational use of these selectors can improve the logic and simplicity of CSS.
2025-07-16 comment 0 565
Course Introduction：Common HTML attributes include class, id, src, alt, style, placeholder, etc. class is used for CSS or JS control elements, id uniquely identifies elements, src specifies resource path, alt provides image replacement text, style sets inline style, placeholder is the input box prompt text; attributes are written in the start label, the structure is attribute name="value", multiple attributes are separated by spaces, and the value is recommended to be wrapped in quotes; note that case is not sensitive but lowercase is recommended, do not miss quotation marks, avoid duplicate attributes, and ensure that the attribute value is legal.
2025-06-30 comment 0 662
Course Introduction：HTML attributes are the way to add extra information to HTML tags, used to configure elements or adjust their behavior. Common attributes include class, id, src, alt, placeholder, etc. They are written in the start tag in the form of name="value", such as href specifying the link address, and alt provides alternative text for the image. Attributes are widely used, such as required to set the input box, triggering JS functions (onclick), and boolean attributes (disabled, checked) to take effect without a value. When using it, you should use quotes to wrap the attribute value, especially if it contains spaces or special characters; specific attributes are only applicable to the corresponding tag; custom
2025-07-02 comment 0 183
Course Introduction：The ch unit in CSS represents "character unit", which represents the width of the character "0" in the current font. It is mainly suitable for width layouts based on text size, such as setting the input box width to suit a specific number of characters, creating responsive UI components that are visually aligned with the character width, ensuring that each character is arranged neatly in a code editor or preformatted text block; it performs best in monospace fonts, with 1ch equaling the width of any single character; but in proportional fonts, due to the different widths of each character, it may not be able to accurately align.
2025-07-22 comment 0 704
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 0 685
Course Elementary 13795
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 82320
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 13157
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 24603
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 27463
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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