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Course Introduction：How to write a multi-level associated drop-down list, as shown below

2016-06-24 comment 0  1632

Course Introduction：Pure CSS Multi-Level Drop-Down Menu: A Comprehensive GuideMulti-level drop-down menus, a vital element in web navigation, can be elegantly crafted...

2024-12-11 comment 0  1267

Course Introduction：Achieving a Sleek Multi-Level CSS Drop-Down MenuIn the realm of web design, creating user interfaces that seamlessly guide visitors through your...

2024-11-29 comment 0  541

Course Introduction：To create an HTML form, you need to master the basic tags and structure. The specific steps are as follows: 1. Use the tag to wrap the content and set the action and method attributes; 2. Add input fields such as text, password, radio, checkbox, email and submit; 3. Use and implement the information of the tags to improve the interactive experience and add the name attribute to each input item; 4. Use and implement the drop-down menu and multi-line text input; 5. Pay attention to the settings of required items, the various implementation methods of the submission button, and the customization of form styles. Master these key points to quickly build a complete HTML form.

2025-07-05 comment 0  169

Course Introduction：Using data verification in Excel is mainly to limit the data type or range of input in cells and prevent incorrect input. 1. Restrict input to specified options: By setting the source of the list (such as "male, female, unknown"), the drop-down menu selection input is realized; 2. Set the value range: For example, set the age between 18 and 60, select an integer and set the minimum maximum value; 3. Prevent duplicate content: Check uniqueness with the formula = COUNTIF(A:A,A1)=1 to avoid duplication of ID number and other repetitions; 4. Ignore blank items: Check "Ignore empty values", allowing blanks, but the rules must be compliant when filling in, such as 11-digit phone numbers. Using these functions rationally can greatly reduce input errors, especially suitable for multi-person collaboration scenarios.

2025-07-06 comment 0  855

Course Elementary  13766

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  82273

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  13140

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  27445

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.