Usage of provide and inject in vue

provide and inject are methods for sharing data in Vue.js: provide() provides data in the parent component. inject() gets the data provided by the parent component in the child component. Features: Data is responsive and flows to the required location on demand without explicitly passing props.

provide and inject in Vue.js

Question: What is Vue. provide and inject in js?

Answer: provide and inject are two global methods in Vue.js, used to share data between different components.

Detailed description:

provide

## is used in the parent component to provide data to its child components.
• Use the provide() method in the parent component's setup() or created() method to provide data.
• Syntax used:
• provide('propertyName', value)

inject

Use Get data from parent component in child component.
• Use the inject() method in the setup() method of the subcomponent to obtain data.
• Syntax used:
• const propertyName = inject('propertyName')

Usage:

In the parent component, use the provide() method to provide data:

1. <code class="javascript">// 父组件
   export default {
     setup() {
       provide('sharedData', {
         message: 'Hello, world!'
       })
     }
   }</code>

In the child component, use the inject() method to obtain data:

2. <code class="javascript">// 子组件
   export default {
     setup() {
       const sharedData = inject('sharedData')
       console.log(sharedData.message) // 输出: "Hello, world!"
     }
   }</code>

Features:

provide and inject allow data to flow on demand to the desired location in the component tree.
• They can be used to share state, configuration items, or other data without explicitly passing props from component to component.
• The shared data is responsive, when it changes in the parent component, the child component will automatically update.

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