How to reference other components in vue

In Vue, ways to reference other components include: using <component> tags, slots, scoped slots, events, and refs.

Methods to reference other components in Vue

In Vue, there are many ways to reference other components, depending on how the component is declared and usage scenarios.

1. Use the <component> tag

This is the most direct way to reference a component, allowing direct use of child components in parent components . The syntax is as follows:

<component :is="componentName"></component>

where componentName is the name of the subcomponent or component object.

2. Use slots

Slots can insert child component content into a specific location in the parent component layout. Use the slot syntax in the parent component:

<my-component>
  <p>这是插槽内容</p>
</my-component>

Use the slot directive in the child component to specify the location of the slot content:

<template>
  <div>
    <slot></slot>
  </div>
</template>

3. Use scoped Slot

scoped slot allows the creation of a local scope for a child component within the parent component. Use the scoped slot syntax in the parent component:

<my-component>
  <template #scoped-slot="{ prop }">
    <p>{{ prop }}</p>
  </template>
</my-component>

Use the scoped directive in the child component to convert the slot to a scoped slot:

<template scoped>
  <div>
    <slot></slot>
  </div>
</template>

4 . Using Events

Events can be used to communicate between components. Use the $emit method in the child component to trigger the event:

this.$emit('my-event', data);

Use the v-on directive and event name in the parent component to listen for the event:

<my-component @my-event="handleEvent(data)"></my-component>

5. Use refs

refs can be used to obtain component instances. Use the ref attribute in the child component to specify a reference:

<template ref="myRef">
  ...
</template>

Use the $refs attribute in the parent component to get the component instance:

console.log(this.$refs.myRef);

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