Hello there, Vue JS enthusiasts! My name is Jane and today we are going to talk about one of the most intriguing and helpful Vue JS concepts, the Lifecycle Hooks. If you are new to Vue JS or want to improve your understanding of it, this is a must-read article for you. In this post, I am going to explain what the Lifecycle Hooks are, why they matter, and how you can use them to make your Vue JS application more efficient and reactive.

What are the Vue JS Lifecycle Hooks? 💡

Lifecycle Hooks simply represent specific moments in the lifecycle of a Vue component. These moments occur when certain events happen in the component, such as creation, mounting, updating, and destruction. Vue automatically triggers certain functions at each of these moments in order to help you manage your component, data, and events.

Using Lifecycle Hooks properly can be a game-changer in Vue JS development. With them, you can create custom logic and behavior for your components, as well as get access to important information about the component’s state.

What are the Different Types of Vue JS Lifecycle Hooks? 🎡

There are several types of Lifecycle Hooks in Vue JS, each of which serves a distinct purpose in the development lifecycle of a component. Some of the most prominent hooks are:

beforeCreate() ➡️ created() ➡️ beforeMount() ➡️ mounted()

These hooks represent the creation and mounting stages of a Vue component. beforeCreate() is the first hook that is called when a component is created, and is generally used for initialization tasks like setting up data variables and loggers. created() is called after beforeCreate and is a good place to get some data using AJAX calls.

beforeMount() gets called right before the component is mounted on the web page. This hook provides you with the opportunity to make any necessary last-minute changes to the component’s template, if required.

Finally, mounted() marks the end of the ‘creation and mounting’ phase, and is the perfect time to execute any third-party plugins, initialize timers, and start listening to events.

beforeUpdate() ➡️ updated()

The ‘updating’ phase is represented by these hooks. Before the component is updated with new data, beforeUpdate() gets called. This is where you can compare the data in your component and take any special action that you need to take, in order to keep the component’s integrity and reactivity.

After the component has been updated, updated() is called. This is where you can do anything you need to do after your component has been updated such as updating a calendar, or refreshing the component content.

beforeDestroy() ➡️ destroyed()

The final phase of the Lifecycle Hooks is the destruction phase. At this point, your component is being destroyed and beforeDestroy() is triggered. This is where you can do any cleaning tasks or component data cleanup.

Finally, when the component is finally destroyed, destroyed() is called. It is the perfect opportunity for you to unbind event listeners or subscriptions and clean up memory.

How to Use Vue JS Lifecycle Hooks? 🛠️

The first step in using Vue JS Lifecycle Hooks is knowing when and where to use them. Once you understand the purpose and structure of the hooks, you can start to create custom logic. Here are some tips to help you use the hooks effectively:

  • Understand your component and its data
  • Know when the hook is supposed to be called
  • Use the hook to update or retrieve data according to the component’s specifications
  • Break down your hook into sub-tasks

With these steps, you can create custom functionality, build reactive components, and write cleaner code in your Vue JS application.

Here’s an Image of the Vue JS Lifecycle Hooks 🌅

An illustration of Vue JS Lifecycle Hooks in a flowchart format

Vue JS Lifecycle Hooks

To sum up, Vue JS Lifecycle Hooks are a powerful tool that can help you manage your component lifecycle and create more efficient and reactive Vue JS applications. By understanding the structure and context of the different hooks, you can create custom logic, update data, and write cleaner code that will give your users a better experience.

Happy coding! 💻