What are the hook functions in vue

Vue.js provides a variety of hook functions, including hooks in the creation, update, destruction and error handling phases, as well as hooks in rendering and other phases. These hooks allow developers to customize operations during the component life cycle for initializing data, handling DOM operations, cleaning up resources, catching errors, and prefetching data on the server side, thereby enhancing component behavior and application responsiveness and maintainability. .

Hook function in Vue.js

The hook function in Vue.js is a predefined function. Allow developers to insert their own code during the component's life cycle. These functions enable developers to perform custom operations during component creation, update, and destruction.

What are the hook functions?

Vue.js provides a variety of hook functions, covering various stages of the component life cycle:

• Life cycle hook:

  • beforeCreate()
  • created()
  • beforeMount()
  • mounted()
  • beforeUpdate()
  • updated()
  • beforeDestroy()
  • destroyed()

• ##Rendering hook:

  render()
  • renderTracked()
  • renderTriggered()

• Error handling hook:

  errorCaptured()

• Other hooks:

  activated( )
  • deactivated()
  • serverPrefetch()

Use hook function

Hook Functions can be used in the following ways:

Defined in the component definition:

<code class="javascript">export default {
  beforeCreate() { ... },
  created() { ... }
};</code>

Via
• setup() Function defined:

<code class="javascript">const { beforeCreate, created } = setup()

beforeCreate(() => { ... })
created(() => { ... })</code>

Purpose of hook function

Hook function can be used to perform various tasks, such as:

• Initialize data: In created() hook
• Processing DOM operations: In mounted() and updated()In hooks
• Clean up resources: Captured in beforeDestroy() and destroyed() hooks
• And handling errors: Through errorCaptured() hooks
• Prefetch data on the server side: Through serverPrefetch() hooks

By leveraging hook functions, developers can customize component behavior and enhance the responsiveness and maintainability of their applications.

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