How do API calls differ between Vue 2 and Vue 3?

In Vue 2 and Vue 3, the approach to making API calls is similar in terms of using libraries like axios or fetch, but the structure of the code and how state is managed differs due to the changes in Vue 3’s architecture.

Key Differences Between API Calls in Vue 2 and Vue 3:

1. State Management:

• Vue 2: State is managed using a simple data object. You access and modify state directly in the data function.
• Vue 3: Uses ref and reactive to manage state reactively, offering more flexibility and granularity in handling data.

1. Lifecycle Hooks:

• Vue 2: API calls are typically placed in the created or mounted lifecycle hooks.
• Vue 3: With the Composition API, API calls are generally made inside the setup function, using the onMounted hook to fetch data after the component is created.

1. Code Organization:

• Vue 2: The Options API organizes code into separate sections like data, methods, and lifecycle hooks. This can sometimes lead to disorganized code as your components grow.
• Vue 3: The Composition API organizes code by features, making it easier to manage large components and reuse logic across multiple components.

1. Reusability:

• Vue 2: Reusability is often achieved through mixins or event buses.
• Vue 3: Composables (functions that encapsulate logic) make it easier to reuse API call logic across different components.

Why Vue 3 is More Efficient:

• Flexibility: Vue 3’s Composition API gives developers more control over how data is handled and organized, making API calls more modular and scalable.
• Cleaner Code: The Composition API allows for better code organization and easier reusability of logic, especially as components grow in size.