Vue Props

Vue Props

They are the main way components communicate downward.

 What are Props?

Props are custom attributes that you register on a component so it can receive data from its parent.

 Data flow:

•  Read-only
•  Reactive
•  Reusable

 Basic Props Example

 Parent Component

 Child Component

•  The child receives name from the parent.

 Dynamic Props (v-bind)

Use v-bind (:) to pass dynamic values.

 Multiple Props

 Props with Types (Recommended)

• Helps catch bugs
• Better readability

 Props with Validation

 Passing Objects & Arrays

•  Props are reactive — changes in parent update child.

 Props are Read-Only

Wrong:

Correct:

• Emit event to parent

• Use local copy

 Props Naming Rules

JavaScript

Template

•  camelCase → kebab-case

 Boolean Props

• true automatically

 Props vs Data (Important)

 Common Mistakes

•  Mutating props directly
•  Not validating props
•  Using props instead of state
•  Passing too many props

 Best Practices

•  Validate props
•  Keep props simple
•  Use emits for updates
•  Prefer objects for grouped data
•  Document props clearly

 Summary Table

Conclusion

Vue props are the foundation of component communication and reusability.
Mastering props helps you build clean, scalable, and maintainable Vue apps.