Home Web Front-end Vue.js Detailed explanation of the keep-alive function in Vue3: Application to optimize application performance

Detailed explanation of the keep-alive function in Vue3: Application to optimize application performance

Jun 18, 2023 pm 11:21 PM
vue keep-alive Application performance

Detailed explanation of the keep-alive function in Vue3: Applications to optimize application performance

In Vue3, the keep-alive function becomes more powerful and can achieve more optimization functions. Through the keep-alive function, component status can be retained in memory to avoid repeated rendering of components and improve application performance and user experience. This article will introduce in detail the usage and optimization strategies of the keep-alive function in Vue3.

1. Introduction to keep-alive function

In Vue3, the keep-alive function is implemented as a built-in instruction, which can cache component status and prevent repeated rendering of components, thereby improving application performance. and user experience. The keep-alive function can be used in the following two ways:

1. Add the keep-alive instruction directly outside the component that needs to be cached.

For example, the my-component component in the following code can implement the function of caching component status by adding the keep-alive instruction externally:

2. Configure routing guards in App.vue to cache all routing components .

For example, App.vue in the following code can cache all routed components by configuring route guards:

In this configuration, the router-view directive will be based on The component corresponding to the current route is set to the Component variable. Then, set this variable to the is attribute of the dynamic component to achieve the effect of caching all routed components.

2. Optimization strategy of keep-alive function

Although the keep-alive function can cache component status, excessive use of the keep-alive function will actually reduce the performance of the application. Therefore, when using the keep-alive function for optimization, trade-offs and optimizations need to be made based on actual needs. Here are some common optimization strategies.

1. Only cache components that need to be cached

Caching all components will cause the application to occupy a higher amount of memory and reduce application performance. Therefore, when using the keep-alive function, you need to clarify which components need to be cached and which components do not need to be cached. For more complex components, you can consider caching; for simple components, you don't need to cache them.

2. Control the life cycle of the cache

In order to improve the performance of the application, the life cycle of the cache component needs to be controlled. Some components may need to be re-rendered on every render, while some components may only need to be rendered on the first render and never need to be re-rendered thereafter. In order to control the life cycle of the cache component, you can perform relevant operations in the life cycle hook of the cache component.

In Vue3, the hook functions mainly include the following:

activated: called when the component is activated;

deactivated: called when the component is deactivated;

beforeMount: Called before the component is mounted;

beforeUnmount: Called before the component is uninstalled.

These hook functions can help applications control the life cycle of cache components to achieve more refined optimization.

3. Use include and exclude attributes

When using the keep-alive function, you can use the include and exclude attributes to control which components need to be cached and which components do not need to be cached.

The include attribute indicates which components need to be cached. It can be a string, array or regular expression. For example, the following code indicates that a component named "my-component" needs to be cached:

The exclude attribute indicates which components do not need to be cached. It can also be a string, array or regular expression. For example, the following code indicates that the component named "my-component" does not need to be cached:

Through the include and exclude attributes, you can more flexibly control the scope of the cache component, thereby achieving more refined optimization.

3. Summary

In Vue3, the keep-alive function is an important tool for optimizing application performance. It can help applications cache component states and avoid repeated rendering of components. When using the keep-alive function, you need to pay attention to issues such as cache range and cache cycle to achieve more refined optimization. We believe that with continuous research and practice, Vue3's keep-alive function will become more complete and powerful, helping us build excellent web applications more efficiently.

The above is the detailed content of Detailed explanation of the keep-alive function in Vue3: Application to optimize application performance. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undress AI Tool

Undress AI Tool

Undress images for free

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to build a component library with Vue? How to build a component library with Vue? Jul 10, 2025 pm 12:14 PM

Building a Vue component library requires designing the structure around the business scenario and following the complete process of development, testing and release. 1. The structural design should be classified according to functional modules, including basic components, layout components and business components; 2. Use SCSS or CSS variables to unify the theme and style; 3. Unify the naming specifications and introduce ESLint and Prettier to ensure the consistent code style; 4. Display the usage of components on the supporting document site; 5. Use Vite and other tools to package as NPM packages and configure rollupOptions; 6. Follow the semver specification to manage versions and changelogs when publishing.

How to use PHP to develop a Q&A community platform Detailed explanation of PHP interactive community monetization model How to use PHP to develop a Q&A community platform Detailed explanation of PHP interactive community monetization model Jul 23, 2025 pm 07:21 PM

1. The first choice for the Laravel MySQL Vue/React combination in the PHP development question and answer community is the first choice for Laravel MySQL Vue/React combination, due to its maturity in the ecosystem and high development efficiency; 2. High performance requires dependence on cache (Redis), database optimization, CDN and asynchronous queues; 3. Security must be done with input filtering, CSRF protection, HTTPS, password encryption and permission control; 4. Money optional advertising, member subscription, rewards, commissions, knowledge payment and other models, the core is to match community tone and user needs.

Free entrance to Vue finished product resources website. Complete Vue finished product is permanently viewed online Free entrance to Vue finished product resources website. Complete Vue finished product is permanently viewed online Jul 23, 2025 pm 12:39 PM

This article has selected a series of top-level finished product resource websites for Vue developers and learners. Through these platforms, you can browse, learn, and even reuse massive high-quality Vue complete projects online for free, thereby quickly improving your development skills and project practice capabilities.

How to develop AI intelligent form system with PHP PHP intelligent form design and analysis How to develop AI intelligent form system with PHP PHP intelligent form design and analysis Jul 25, 2025 pm 05:54 PM

When choosing a suitable PHP framework, you need to consider comprehensively according to project needs: Laravel is suitable for rapid development and provides EloquentORM and Blade template engines, which are convenient for database operation and dynamic form rendering; Symfony is more flexible and suitable for complex systems; CodeIgniter is lightweight and suitable for simple applications with high performance requirements. 2. To ensure the accuracy of AI models, we need to start with high-quality data training, reasonable selection of evaluation indicators (such as accuracy, recall, F1 value), regular performance evaluation and model tuning, and ensure code quality through unit testing and integration testing, while continuously monitoring the input data to prevent data drift. 3. Many measures are required to protect user privacy: encrypt and store sensitive data (such as AES

How to use PHP to implement AI content recommendation system PHP intelligent content distribution mechanism How to use PHP to implement AI content recommendation system PHP intelligent content distribution mechanism Jul 23, 2025 pm 06:12 PM

1. PHP mainly undertakes data collection, API communication, business rule processing, cache optimization and recommendation display in the AI content recommendation system, rather than directly performing complex model training; 2. The system collects user behavior and content data through PHP, calls back-end AI services (such as Python models) to obtain recommendation results, and uses Redis cache to improve performance; 3. Basic recommendation algorithms such as collaborative filtering or content similarity can implement lightweight logic in PHP, but large-scale computing still depends on professional AI services; 4. Optimization needs to pay attention to real-time, cold start, diversity and feedback closed loop, and challenges include high concurrency performance, model update stability, data compliance and recommendation interpretability. PHP needs to work together to build stable information, database and front-end.

How to build a Vue application for production? How to build a Vue application for production? Jul 09, 2025 am 01:42 AM

Deploying Vue applications to production environments requires optimization of performance, ensuring stability and improving loading speed. 1. Use VueCLI or Vite to build a production version, generate a dist directory and set the correct environment variables; 2. If you use VueRouter's history mode, you need to configure the server to fallback to index.html; 3. Deploy the dist directory to Nginx/Apache, Netlify/Vercel or combine CDN acceleration; 4. Enable Gzip compression and browser caching strategies to optimize loading; 5. Implement lazy loading components, introduce UI libraries on demand, enable HTTPS, prevent XSS attacks, add CSP headers, and restrict third-party SDK domain names to enhance security.

How to use PHP to develop e-commerce backend monetization PHP e-commerce system architecture and profit strategy How to use PHP to develop e-commerce backend monetization PHP e-commerce system architecture and profit strategy Jul 25, 2025 pm 06:33 PM

1. The mainstream frameworks of PHP e-commerce backend include Laravel (fast development, strong ecology), Symfony (enterprise-level, stable structure), Yii (excellent performance, suitable for standardized modules); 2. The technology stack needs to be equipped with MySQL Redis cache, RabbitMQ/Kafka message queue, Nginx PHP-FPM, and front-end separation is considered; 3. High concurrency architecture should be layered and modular, database read and write separation/distributed database, accelerated with cache and CDN, asynchronous processing of tasks, sharing of load balancing and Session, gradually microservice, and establish a monitoring and alarm system; 4. Multiple monetization paths include product price difference or platform commission, site advertising, SaaS subscription, customized development and plug-in market, API connection

PHP creates customer management system monetization PHPCRM system design and application PHP creates customer management system monetization PHPCRM system design and application Jul 25, 2025 pm 06:03 PM

Designing a PHPCRM system that is both practical and monetizable, first of all, we must create an MVP that includes core functions such as customer management, sales tracking, and automation processes, and adopt a modular architecture (such as Laravel) to support subsequent value-added function expansion; 2. Lower the usage threshold through intuitive UX design (such as Vue.js front-end), so that users are willing to pay continuously; 3. Use data analysis reports (such as sales funnels, performance analysis) to help customers improve decision-making efficiency, and free basic functions and advanced reports to achieve monetization; 4. Implement a multi-tenant architecture to ensure data isolation, laying the foundation for the SaaS model, and avoiding later reconstruction affecting commercialization; 5. Monetization not only relies on subscription fees, but also benefits through API openness, customized development, technical support and plug-in market diversified market

See all articles