Vue 3·Vue from reactivity to a routed app

Emits and slots

Send events up and let parents fill named slots.

Intermediate 13 min read Lesson 7 of 300 Challenge included

What you will be able to do

Declare events with defineEmits.
Emit a typed payload.
Use named slots for layout regions.
Provide fallback content inside a slot.

In plain English

Emits are the child-to-parent channel. Slots are the parent-to-child content channel. Together they let a component stay reusable without knowing the parent’s data model.

Panel.vueJavaScript

<script setup>
defineEmits<{ close: [] }>()
</script>

<template>
  <section>
    <header>
      <slot name="title">Untitled</slot>
      <button @click="$emit('close')">Close</button>
    </header>
    <slot />
  </section>
</template>

Your turn

Emit a save event

Easy

Declare and emit a save event from a form component.

JAVASCRIPT · starter

defineEmits<{ save: [] }>()

Check your understanding before moving on.

Knowledge checkQuestion 1

What is the purpose of a slot?

Select an answer to continue

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Next: Lifecycle and data fetching

Lesson 7 of 300 · 0% of course