Component Communication

Patterns for Talking Between Components

Props/events/slots cover most parent-child needs. For distant nodes, use provide/inject or Pinia.

Avoid event buses as your default Vue 3 architecture.

// parent→child: props
// child→parent: emits
// distant: pinia or provide/inject

Communication decision sketch.

Decision Tree

close relation → props/emits; app-wide client → Pinia; injected utilities → provide

• Prefer Vue 3 + Composition API.
• Use script setup for SFCs.
• Keep components focused.
• Lean on official docs.

Component Communication Cheatsheet

Quick reference for patterns covered in this lesson.

Resist Globalize Early

Lift state only when multiple routes/components need it.

Common Mistakes

• Event bus spaghetti.
• Prop drilling 8 levels without slots/store.

Key Takeaways

• Component Communication is a core Vue skill.
• Practice in a Vite app.
• Prefer clarity.
• Revisit docs for edge cases.