How to achieve multi-casual linkage between Vue3 and Element-Plus
Apr 07, 2025 pm 07:48 PM
It is convenient to directly use Element-Plus' Select component nesting to achieve multi-level linkage. Although it is convenient, the efficiency is worrying. The core lies in how to efficiently manage and update data at the data layer, process data using recursive functions, and manage selection state with ref. Pay attention to details such as asynchronous operations, data consistency, error handling and loading status prompts. Code is just a tool, and what is important is design ability and performance sensitivity.
Multi-stage linkage between Vue3 and Element-Plus: not only code, but also thinking
Many friends asked me how to achieve multi-level linkage between Vue3 and Element-Plus. This question seems simple, but it actually has a secret. On the surface, it is nothing more than a combination of several Select components, but truly gracefully solving this problem requires a deep understanding of data structures, component communications, and performance optimization. After reading this article, you can not only write out the code, but also understand the design ideas behind it and avoid falling into common pitfalls.
Let’s talk about the conclusion first: It is convenient to directly use Element-Plus’ Select component nesting to achieve multi-level linkage. Although it is convenient, the efficiency is worrying, especially when the data volume is large. Why? Because each selection of the superior will trigger the re-rendering of the subordinate component, which will create a performance bottleneck.
We have to change our thinking. The core lies in how to manage and update data efficiently. Instead of allowing components to render frequently, it is better to make a fuss in the data layer. I recommend using a recursive function to process the data and using ref to manage the selection state.
Let's look at the code, this is not a simple copy-paste:
<code class="javascript"><template> <div> <el-select v-model="selectedLevel1"> <el-option v-for="item in level1Options" :key="item.value" :label="item.label" :value="item.value"> </el-option> </el-select> <el-select v-model="selectedLevel2" v-if="selectedLevel1"> <el-option v-for="item in level2Options" :key="item.value" :label="item.label" :value="item.value"> </el-option> </el-select> <el-select v-model="selectedLevel3" v-if="selectedLevel2"> <el-option v-for="item in level3Options" :key="item.value" :label="item.label" :value="item.value"> </el-option> </el-select> </div> </template> <script> import { ref, computed } from 'vue'; export default { setup() { const level1Options = ref([ { value: 'A', label: '選項(xiàng)A' }, { value: 'B', label: '選項(xiàng)B' }, ]); const level2Options = ref([]); const level3Options = ref([]); const selectedLevel1 = ref(''); const selectedLevel2 = ref(''); const selectedLevel3 = ref(''); const handleLevel1Change = (val) => { // 根據(jù)val 獲取level2Options 數(shù)據(jù)，這部分邏輯根據(jù)你的數(shù)據(jù)源決定// 例如：從后端獲取，或從本地?cái)?shù)據(jù)中篩選fetchLevel2Data(val); selectedLevel2.value = ''; // 清空下級(jí)選擇selectedLevel3.value = ''; // 清空下級(jí)選擇}; const handleLevel2Change = (val) => { // 同理，獲取level3Options 數(shù)據(jù)fetchLevel3Data(val); selectedLevel3.value = ''; // 清空下級(jí)選擇}; const fetchLevel2Data = async (level1Value) => { // 模擬異步獲取數(shù)據(jù)await new Promise(resolve => setTimeout(resolve, 500)); level2Options.value = level1Value === 'A' ? [{ value: 'A1', label: 'A1' }, { value: 'A2', label: 'A2' }] : [{ value: 'B1', label: 'B1' }]; }; const fetchLevel3Data = async (level2Value) => { // 模擬異步獲取數(shù)據(jù)await new Promise(resolve => setTimeout(resolve, 500)); level3Options.value = level2Value === 'A1' ? [{ value: 'A11', label: 'A11' }] : []; }; return { level1Options, level2Options, level3Options, selectedLevel1, selectedLevel2, selectedLevel3, handleLevel1Change, handleLevel2Change, }; }, }; </script></code>
The key to this code is fetchLevel2Data and fetchLevel3Data functions, which simulate the process of obtaining data from the server. In actual applications, you need to modify this part of the code according to your data interface. Remember, asynchronous operations are important to avoid blocking the main thread.
In addition, pay attention to the clearing operations of selectedLevel2 and selectedLevel3 , which can ensure the consistency of the data. Don't underestimate these details, they can avoid many weird bugs.
Finally, don't forget to consider error handling and loading status prompts to make the user experience better. This article is just a stolen idea. In actual projects, you may need more complex logic, such as caching data, optimizing data structures, etc. Remember, code is just a tool, and more importantly, your design capabilities and sensitivity to performance. I wish you to write elegant and efficient multi-level linkage components!
The above is the detailed content of How to achieve multi-casual linkage between Vue3 and Element-Plus. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to choose a free market website in the currency circle? The most comprehensive review in 2025
Jul 29, 2025 pm 06:36 PM
The most suitable tools for querying stablecoin markets in 2025 are: 1. Binance, with authoritative data and rich trading pairs, and integrated TradingView charts suitable for technical analysis; 2. Ouyi, with clear interface and strong functional integration, and supports one-stop operation of Web3 accounts and DeFi; 3. CoinMarketCap, with many currencies, and the stablecoin sector can view market value rankings and deans; 4. CoinGecko, with comprehensive data dimensions, provides trust scores and community activity indicators, and has a neutral position; 5. Huobi (HTX), with stable market conditions and friendly operations, suitable for mainstream asset inquiries; 6. Gate.io, with the fastest collection of new coins and niche currencies, and is the first choice for projects to explore potential; 7. Tra
What is Bitcoin Taproot Upgrade? What are the benefits of Taproot?
Jul 30, 2025 pm 08:27 PM
Directory What is Bitcoin? How does Bitcoin work? Why is Bitcoin not scalable? What is BIP (Bitcoin Improvement Proposal)? What is Bitcoin Taproot Update? Pay to Taproot (P2TR): Benefits of Taproot: Space-saving privacy advantages Security upgrade conclusion: ?Bitcoin is the first digital currency that can send and receive funds without using a third party. Since Bitcoin is software, like any other software, it needs updates and bug fixes. Bitcoin Taproot is such an update that introduces new features to Bitcoin. Cryptocurrency is a hot topic now. People have been talking about it for years, but now with prices rising rapidly, suddenly everyone decides to join and invest in them. Message
Ethena treasury strategy: the rise of the third empire of stablecoin
Jul 30, 2025 pm 08:12 PM
The real use of battle royale in the dual currency system has not yet happened. Conclusion In August 2023, the MakerDAO ecological lending protocol Spark gave an annualized return of $DAI8%. Then Sun Chi entered in batches, investing a total of 230,000 $stETH, accounting for more than 15% of Spark's deposits, forcing MakerDAO to make an emergency proposal to lower the interest rate to 5%. MakerDAO's original intention was to "subsidize" the usage rate of $DAI, almost becoming Justin Sun's Solo Yield. July 2025, Ethe
Why is Bitcoin with a ceiling? Why is the maximum number of Bitcoins 21 million
Jul 30, 2025 pm 10:30 PM
The total amount of Bitcoin is 21 million, which is an unchangeable rule determined by algorithm design. 1. Through the proof of work mechanism and the issuance rule of half of every 210,000 blocks, the issuance of new coins decreased exponentially, and the additional issuance was finally stopped around 2140. 2. The total amount of 21 million is derived from summing the equal-scale sequence. The initial reward is 50 bitcoins. After each halving, the sum of the sum converges to 21 million. It is solidified by the code and cannot be tampered with. 3. Since its birth in 2009, all four halving events have significantly driven prices, verified the effectiveness of the scarcity mechanism and formed a global consensus. 4. Fixed total gives Bitcoin anti-inflation and digital yellow metallicity, with its market value exceeding US$2.1 trillion in 2025, becoming the fifth largest capital in the world
What is Binance Treehouse (TREE Coin)? Overview of the upcoming Treehouse project, analysis of token economy and future development
Jul 30, 2025 pm 10:03 PM
What is Treehouse(TREE)? How does Treehouse (TREE) work? Treehouse Products tETHDOR - Decentralized Quotation Rate GoNuts Points System Treehouse Highlights TREE Tokens and Token Economics Overview of the Third Quarter of 2025 Roadmap Development Team, Investors and Partners Treehouse Founding Team Investment Fund Partner Summary As DeFi continues to expand, the demand for fixed income products is growing, and its role is similar to the role of bonds in traditional financial markets. However, building on blockchain
Ethereum (ETH) NFT sold nearly $160 million in seven days, and lenders launched unsecured crypto loans with World ID
Jul 30, 2025 pm 10:06 PM
Table of Contents Crypto Market Panoramic Nugget Popular Token VINEVine (114.79%, Circular Market Value of US$144 million) ZORAZora (16.46%, Circular Market Value of US$290 million) NAVXNAVIProtocol (10.36%, Circular Market Value of US$35.7624 million) Alpha interprets the NFT sales on Ethereum chain in the past seven days, and CryptoPunks ranked first in the decentralized prover network Succinct launched the Succinct Foundation, which may be the token TGE
What is Ethereum? What are the ways to obtain Ethereum ETH?
Jul 31, 2025 pm 11:00 PM
Ethereum is a decentralized application platform based on smart contracts, and its native token ETH can be obtained in a variety of ways. 1. Register an account through centralized platforms such as Binance and Ouyiok, complete KYC certification and purchase ETH with stablecoins; 2. Connect to digital storage through decentralized platforms, and directly exchange ETH with stablecoins or other tokens; 3. Participate in network pledge, and you can choose independent pledge (requires 32 ETH), liquid pledge services or one-click pledge on the centralized platform to obtain rewards; 4. Earn ETH by providing services to Web3 projects, completing tasks or obtaining airdrops. It is recommended that beginners start from mainstream centralized platforms, gradually transition to decentralized methods, and always attach importance to asset security and independent research, to
Top 10 AI concept coins worth paying attention to in 2025 What are the AI concept coins worth paying attention to in 2025
Jul 29, 2025 pm 06:06 PM
The top ten potential AI concept coins in 2025 include: 1. Render (RNDR) as a decentralized GPU rendering network, providing AI with key computing power infrastructure; 2. Fetch.ai (FET) builds an intelligent economy through autonomous economic agents and participates in the formation of the "Artificial Intelligence Super Alliance" (ASI); 3. SingularityNET (AGIX) builds a decentralized AI service market, promotes the development of general artificial intelligence, and is a core member of ASI; 4. Ocean Protocol (OCEAN) solves data silos and privacy issues, provides secure data transactions and "Compute-to-Data" technology to support the AI data economy; 5.
