Regional three-level linkage

07Apr2025

Using Element-UI's el-cascader component can facilitate three-level linkage, but data structure is the key. The best practice is to flatten arrays, each object contains value, label, and children attributes, pointing to child nodes. When loading data asynchronously, send requests to obtain the next level of data according to the selected value in the handleChange method, and update options data to ensure the integrity of the data structure. Pay attention to common errors such as confusing data structure, asynchronous data loading failures, and untimely data updates. Optimized performance can be done using virtual lists, cached data, and load on demand. Clear data structures, good code style and error handling are key, which helps avoid pitfalls and improve code maintainability.

07Apr2025

Composition API implements Element-UI multi-level linkage mainly uses ref, reactive and computerized to manage data, and functions to handle data changes to realize data-driven view updates. The key is to dynamically calculate the subordinate options based on the superior selection and reset the subordinate selection through the function to ensure the correctness of the linkage.

24Jun2016

CSS3 JQUERY page scrolling effects code

07Apr2025

How to use Element-UI in Vue to implement multi-stage linkage drop-down boxes? Use multiple El-Select components to bind data through v-model and use logic to control dynamic changes in options. Use a recursive function to efficiently generate and update the option list, dynamically update the options for subsequent drop-down boxes based on the selection results. Pay attention to the design of the data structure. A clear data structure can simplify the code logic. Considering performance issues when the data volume is large, use tree structure or virtual scrolling technology to optimize rendering. Handle errors to avoid program crashes. Pay attention to the readability and maintainability of the code, use meaningful variable names, add comments, and split the code into small, reusable functions.

24Jun2016

58 jQuery simulated CSS3 transition page switching effects

06Jul2016

jquery waterfall flow LightBox picture box special effects

01Mar2025

10 cool jQuery menu special effects plug-ins to improve website user experience! We have shared many jQuery navigation menu plugins, and now we bring you 10 more amazing jQuery menu effects plugins. Enjoy it! Related readings: - 10 dazzling jQuery navigation menus - 15 excellent jQuery navigation menus Right-click menu This plugin is very easy to use and compact, allowing you to create right-click menus. Source Code Demo 2. jQuery Multi-level Menu – FX CSS Menu with Submenu 100% CSS menu, visual effects provided by jQuery. Only use Javascript to implement special effects. Fully compatible with cross-browser, package

12Jul2016

PHP implements three-level cascading drop-down box. PHP implements a three-level cascading drop-down box. This is the information I found on the Internet about PHP implementing a three-level cascading drop-down box. I would like to share it with you so that we can make progress together. The specific content is as follows index.php: htmlh