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Is there a caching mechanism in vue?

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Apr 26, 2022 pm 05:22 PM

vue

There is a caching mechanism in vue. You can use "keep-alive" to keep the switched component in memory, retain the state of the component or avoid re-rendering, and implement page caching; "keep-alive" is a Vue's built-in abstract components are used to cache components to avoid loading the same components multiple times and reduce performance consumption.

Is there a caching mechanism in vue?

The operating environment of this article: Windows 10 system, Vue version 2.9.6, DELL G3 computer.

Is there a caching mechanism in vue

Caching, whether it is PC or mobile, is an inevitable problem. There is a keepAlive in vue. This API can basically meet some of our development needs.

A brief introduction to keep-alive:

1. Keep the switched component in memory. You can retain its state or avoid re-rendering to achieve page caching;

2. is an abstract component. It will not render DOM elements by itself, nor will it appear in the parent component chain.

3. When a component is switched within , its two life cycle hook functions, actived and deactived, will be executed accordingly. (This is basically nothing)

Note: In 2.2.0 and higher versions, activated and deactivated will be triggered in all nested components in the tree.

keep-alive is a built-in component of Vue. When it wraps a dynamic component, it will cache inactive component instances instead of destroying them.

Function:

Used to cache components to avoid loading the same components multiple times, reduce performance consumption, and improve user experience.

Usage example:

Use the keep-alive tag in App.vue to cache all pages

  <div id="app">
  <keep-alive>
    <tar-bar></tar-bar>
    <div class="container">
      <left-menu></left-menu>
      <Main />
    </div>
    </keep-alive>
  </div>

Cache some pages

Is there a caching mechanism in vue?

Note: If the transition is directly wrapped outside these two, an error will be reported; if the transition-group is used directly, an error will be reported, and two transitions are required.

[Related recommendations: "vue.js Tutorial"]

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