Course Introduction：The packaged Vue and Element-UI cascading pull-down box components are designed to achieve high customization, ease of maintenance, and excellent performance. Its core functions include: flexible data format processing, asynchronous loading support, customized rendering and error handling. During the packaging process, you need to pay attention to common errors and performance optimization, and follow the principles of code readability and maintainability to improve the reusability, scalability and integration of components.
2025-04-07 comment 0 1174
Course Introduction：Create a reusable drop-down menu component in Vue, which requires the control of content and triggering methods through props and the use of slots to achieve customization. 1. The component structure includes trigger buttons and pull-down panels. Labelprop is used to set button text, and isOpen controls the display status; 2. The interactive logic adopts v-model bidirectional binding to control display, combined with disabled prop, and supports disabledprop to support external closing through clickoutside command; 3. The style is controlled by class, the slot allows custom menu content, and supports trigger and default slot expansion; 4. The command encapsulation of v-click-outside is used to optimize the closing logic and improve the interactive experience.
2025-07-18 comment 0 885
Course Introduction：The best way to build Vue and Element-UI cascaded drop-down menus is to use the el-cascader component directly. But to fully grasp it, you need to have a deep understanding of its tree data structure, asynchronous loading and virtual scrolling mechanisms. Common errors include incorrect data format, asynchronous loading errors, and performance issues. To optimize performance, consider appropriate data structures such as lazy loading, data preprocessing, and using Map.
2025-04-07 comment 0 444
Course Introduction：Vue and Element-UI cascaded drop-down boxes to implement paging function requires: asynchronous loading of data: gradually loading the next level of data according to user selection. Paging parameters: When requesting the server, pass paging parameters (page number, page size), and the server returns the paged data and total data volume. Pagination component: Use the el-pagination component of Element-UI to display the paging and update the paging properties based on the total data volume. Common errors: Handle asynchronous request errors to ensure that paging parameters are correctly passed and processed. Performance optimization: Consider virtual scrolling, data caching and reasonable data structure design.
2025-04-07 comment 0 451
Course Introduction：Managing focus in Vue applications requires using ref to control focus, ensuring a reasonable tab order, processing dynamic content focus, and adding ARIA attributes. First, use ref to set the focus to specific elements, such as the input box in the modal box after the component is mounted; second, maintain the natural Tab order by semanticizing HTML tags and avoiding manual setting of tabindex; third, use life cycle hooks or watcher to adjust the focus position when dynamic content such as modal box or drop-down menu is displayed or hidden; finally, add aria-expanded, aria-label and other attributes to the component to improve the accessibility experience.
2025-07-23 comment 0 879
Course Elementary 13821
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 82357
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 13174
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 24625
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 27484
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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