What does the vue component pass value mean?

Vue component passing values ​​is a mechanism for passing data and information between components. It can be implemented through properties (props) or events: Props: Declare the data to be received in the component and pass the data in the parent component. Events: Use the $emit method to trigger events and listen to them in the parent component using the v-on directive.

Vue component passes value

What is Vue component passing value?

Vue component passing values ​​refers to the mechanism for passing data or information between components. It allows one component to send data to another component, thereby enabling communication between components.

How to implement component transfer values?

There are two main ways to implement component transfer values ​​in Vue:

• Properties (props) : props are read-only input data received by the component. You can declare a prop in the component definition and then pass the data in the parent component.
• Events : Events are a way of communication between components. Events can be triggered through the $emit method and listened to by the parent component using the v-on directive.

Properties (props)

To declare a prop, you can use the props option in the component definition:

 <code class="js">Vue.component('MyComponent', { props: ['message'] });</code>

In the parent component, use the v-bind directive when passing data:

 <code class="html"><mycomponent v-bind:message="greeting"></mycomponent></code>

Events

To trigger an event, you can use the $emit method in the component:

 <code class="js">export default { methods: { emitEvent() { this.$emit('my-event'); } } };</code>

In the parent component, listen for events using v-on directive:

 <code class="html"><mycomponent v-on:my-event="handleEvent"></mycomponent></code>

Other precautions

• prop is read-only, but events can send and receive data.
• Components can also use slots to pass data.
• Vuex and other state management libraries can also be used for data sharing between components.

The above is the detailed content of What does the vue component pass value mean?. For more information, please follow other related articles on the PHP Chinese website!