Detailed explanation of how to use keep-alive in vue
This time I will bring you a detailed explanation of how to use keep-alive in Vue. What are the precautions for using keep-alive in Vue? Here are practical cases, let’s take a look.
1. The role and benefits of keep-alive
In e-commerce related projects, when we enter the list page for the first time I need to request data. When I enter the details page from the list page, I need to request the data even if the details page is not cached, and then return to the list page. At this time, we use keep-alive to cache the component to prevent secondary rendering, which will save a lot of money. performance.
2. Basic usage of keep-alive
In app.vue
<!-- 缓存所有的页面 --> <keep-alive> <router-view v-if="$route.meta.keep_alive"></router-view> </keep-alive> <router-view v-if="!$route.meta.keep_alive"></router-view>
The component content that needs to be cached is directly Add in the router:
meta: {
keepAlive: true // true 表示需要使用缓存 false表示不需要被缓存
}
3.keep-alive life cycle
When keep-alive is introduced, the page first Upon entry, the trigger sequence of the hook is created-> mounted-> activated, and deactivated is triggered when exiting. When entering again (forward or backward), only activated is triggered.
Let’s take a look at the usage problems and solutions of keep-alive in vue
Problem description
In business development, there will be scenarios where routing jumps but data needs to be retained when returning; vue provides keep-alive to handle
Solution
Return The dom does not allow it to be refreshed, and wraps a layer outside the vue-view. When keep-alive is introduced, the page is entered for the first time, the trigger sequence of the hook is created-> mounted-> activated, and deactivated is triggered when exiting. When entering again (forward or backward), only activated is triggered.
Event mounting methods, etc., which are only executed once are placed in mounted; methods that are executed each time the component is entered are placed in activated;
Whether to wrap keep-alive can be configured through parameters;
<keep-alive>
<router-view v-if="$route.meta.keepAlive" style="min-height:100%"></router-view>
</keep-alive>
<router-view v-if="!$route.meta.keepAlive" style="min-height:100%"></router-view>
//不需要刷新的路由配置里面配置 meta: {keepAlive: true}, 这个路由则显示在上面标签；
//需要刷新的路由配置里面配置 meta: {keepAlive: false}, 这个路由则显示在下面标签；
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
Recommended reading:
How to use element-ui to restrict date selection
How to completely uninstall node and npm on Mac
The above is the detailed content of Detailed explanation of how to use keep-alive in vue. 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)
What is the significance of Vue's reactivity transform (experimental, then removed) and its goals?
Jun 20, 2025 am 01:01 AM
ReactivitytransforminVue3aimedtosimplifyhandlingreactivedatabyautomaticallytrackingandmanagingreactivitywithoutrequiringmanualref()or.valueusage.Itsoughttoreduceboilerplateandimprovecodereadabilitybytreatingvariableslikeletandconstasautomaticallyreac
How can internationalization (i18n) and localization (l10n) be implemented in a Vue application?
Jun 20, 2025 am 01:00 AM
InternationalizationandlocalizationinVueappsareprimarilyhandledusingtheVueI18nplugin.1.Installvue-i18nvianpmoryarn.2.CreatelocaleJSONfiles(e.g.,en.json,es.json)fortranslationmessages.3.Setupthei18ninstanceinmain.jswithlocaleconfigurationandmessagefil
What is server side rendering SSR in Vue?
Jun 25, 2025 am 12:49 AM
Server-siderendering(SSR)inVueimprovesperformanceandSEObygeneratingHTMLontheserver.1.TheserverrunsVueappcodeandgeneratesHTMLbasedonthecurrentroute.2.ThatHTMLissenttothebrowserimmediately.3.Vuehydratesthepage,attachingeventlistenerstomakeitinteractive
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
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.
How to implement transitions and animations in Vue?
Jun 24, 2025 pm 02:17 PM
ToaddtransitionsandanimationsinVue,usebuilt-incomponentslikeand,applyCSSclasses,leveragetransitionhooksforcontrol,andoptimizeperformance.1.WrapelementswithandapplyCSStransitionclasseslikev-enter-activeforbasicfadeorslideeffects.2.Useforanimatingdynam
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
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
