How to use keepalive in vue

Keepalive in Vue is used to cache component instances to maintain their state. It can be used by wrapping Keepalive components around child components. Key benefits include: state preservation, performance optimization, and data recovery. Keepalive supports include, exclude, max, and deactivationHook attributes, and is suitable for scenarios where state needs to be maintained, performance optimized, or user input restored.

Keepalive usage in Vue

What is Keepalive?

Keepalive is a component in Vue.js used to cache component instances. It allows components to maintain their state across route switches or other operations.

How to use Keepalive?

To use Keepalive in Vue.js, you need to wrap it as a parent component around the child component:

<code class="html"><keep-alive>
  <my-component></my-component>
</keep-alive></code>

Advantages of Keepalive

When using Keepalive, the main advantages are:

• State saving: It can save the state of the component even after the component is destroyed and recreated.
• Performance Optimization: It can reduce the number of component re-rendering and initialization, thereby improving performance.
• Data recovery: It can recover the data entered by users when switching routes, providing a better user experience.

Keepalive's properties

Keepalive component supports the following properties:

• include:Specify included in The name of the component in the cache.
• exclude: Specifies the component name to exclude from the cache.
• max: Specifies the maximum number of components allowed to remain in the cache.
• deactivationHook: Hook function triggered when the component is deleted from the Keepalive.

Usage scenarios

Keepalive is useful in the following scenarios:

• When it is necessary to maintain routing switching or other operations component status.
• When you need to optimize component rendering performance.
• When it is necessary to restore the data entered by the user.

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