Course Content
VUE Tutorial
About Lesson

beforeCreate, created

Vue.js, often referred to as Vue, is a progressive JavaScript framework used for building user interfaces. In this post, we’ll delve into two crucial lifecycle hooks: beforeCreate and created.

The Lifecycle of Vue Components

Lifecycle Hooks Overview

Before we dive into specifics, let’s understand Vue’s component lifecycle. It consists of various hooks, each serving a distinct purpose throughout the creation, mounting, updating, and destruction of a Vue instance.

The Prelude: beforeCreate

What is beforeCreate?

The beforeCreate hook is the earliest point in the lifecycle. At this stage, data observation, event/watcher setup, and initial render processes haven’t taken place.

Use Cases

  • Setting up Custom Properties: You can initialize properties before the reactive data observation begins.
  • Non-Reactive Setup: Actions performed here won’t trigger reactivity, making it suitable for tasks not relying on reactive data.

The Birth: created

Introduction to created

The created hook follows beforeCreate and is triggered once the Vue instance is created. At this point, the initial stage of the component’s lifecycle is complete.

Applications

  • Initialization Logic: Perform tasks requiring access to reactive data.
  • AJAX Requests: Ideal for fetching data asynchronously.

Best Practices

Leveraging the Power

  • Delineate Logic: Use beforeCreate for setup unrelated to component data. Reserve created for actions reliant on reactive data.
  • Async Operations: Asynchronous operations, such as AJAX requests, find a home in the created hook.

Potential Pitfalls

Watch Out!

  • Reactivity Issues: Manipulating data in beforeCreate won’t trigger reactivity, potentially leading to unexpected behaviors.
  • Scope Limitation: Variables declared in beforeCreate might not be accessible in subsequent hooks.