How to communicate between components in vue

The main methods of communication between Vue components are: 1. Parent-child component communication (props, emit); 2. Sibling component communication (EventBus, Vuex); 3. Global event bus ($root, $listeners); 4. Custom events ($emit, $on); 5. Provide and Inject (provide, inject). Choosing the most appropriate communication method depends on the specific situation and communication granularity.

Vue inter-component communication

In Vue, inter-component communication is crucial, it enables components to communicate with each other Pass data and trigger events. There are mainly the following ways to implement inter-component communication:

1. Parent-child component communication

• props:Parent component to child component Pass data, read only.
• emit: The child component sends events to the parent component.

2. Sibling component communication

• EventBus: Create a central event bus through which components can register and trigger event.
• Vuex: Using a centralized state management system, components can store and access shared data.

3. Global event bus

• $root: Access to the root component, you can trigger and listen for events.
• $listeners: Listen events in the root component, triggered by other components.

4. Custom events

• $emit: Register and trigger custom events, which can be between components Pass data and trigger callbacks.
• $on: Listen to custom events and execute callbacks when triggered.

5. Provide and Inject

• provide: Provide data in the parent component, and the child component can access it through injection .
• inject: Inject dependencies provided by the parent component into the child component.

Choose the most appropriate communication method:

Selecting the most appropriate communication method depends on the specific situation. For parent-child component communication, props and emit are great. For sibling components or cross-level communication, EventBus or Vuex may be more suitable. Custom events and Provide/Inject are suitable for more flexible and customizable communication scenarios.

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