Welcome, curious minds! Today, we’ll be exploring one of the most important aspects of Vue JS: the Lifecycle Hooks. These hooks are your keys to understanding how Vue interactions work and how to control them. 🎉

What Are Vue JS Lifecycle Hooks?

The Lifecycle Hooks in Vue JS are a series of methods that allow developers to tap into the different stages of a Vue instance’s lifecycle. Through these methods, you can manipulate, control, or influence how your Vue components behave.

From creating a Vue instance to destroying a component, the Lifecycle Hooks provide a way to run custom logic at specific moments of the app’s lifecycle. Understanding these hooks is crucial to mastering Vue JS. 😎

A flowchart depicting the lifecycle of a Vue component.

The Different Lifecycle Hooks

Every Vue component has a specific lifecycle that goes through various stages. During each stage, a specific hook function is called.

In total, Vue JS has 8 Lifecycle Hooks that include the following:

beforeCreate()

The beforeCreate() hook is called right before your component is created. It is useful for setting initial data values, injecting dependencies, and registering event listeners.

A hand holding a notebook with the notes 'beforeCreate()' written on it.

created()

The created() hook is called as soon as the component is created and its data is made available. It is ideal for performing initial data fetching so that your UI can be updated with the correct information.

A computer screen displaying the data of a component after the 'created()' hook function has been executed.

beforeMount()

The beforeMount() hook is called right before a component is mounted to the DOM. It gives you the chance to modify the DOM before Vue takes over.

A hammer and a chisel hovering over an HTML code block as it's being modified in the 'beforeMount()' hook.

mounted()

The mounted() hook is called after the component has been mounted to the DOM. It is useful for making direct manipulations to the DOM, setting up timers and intervals, or registering event listeners.

A computer screen displaying the data of a component after the 'mounted()' hook function has been executed. It is shown instead of the created() computer screen.

beforeUpdate()

The beforeUpdate() hook is called right before the Vue component updates the DOM with new values. It is a great place to perform last-minute updates to the component.

A computer screen displaying the interface of a website before the Vue component updates it. It also has a note which says 'beforeUpdate()'

updated()

The updated() hook is called after the component updates the DOM with new values. If you need to access the new values of a component, use the updated() hook.

A computer screen displaying the interface of a website after the Vue component updates it. It also has a note which says 'updated()'

beforeDestroy()

The beforeDestroy() hook is called right before a component is destroyed. It gives you a chance to clean up any resources or event listeners that you no longer need.

A trash can with a component inside of it and a note which says 'beforeDestroy()'

destroyed()

The destroyed() hook is called as soon as a component is destroyed. When this hook is called, all event listeners and other resources set up by the component will be completely removed.

An image of a component vanishing as it's being destroyed. A note below it says 'destroyed()'

Conclusion

Congratulations, you made it to the end of the guide! 😍

By now, you should have a better understanding of the Vue JS Lifecycle Hooks and how to use them to your advantage. Remember, the key to mastering Vue is taking advantage of these hooks and controlling the app’s lifecycle.

Keep in mind, each hook will be called in a specific order. This order is depicted in the image at the beginning of this guide. Understanding this order is critical for effective utilization of these hooks.

Now, go forth and conquer the world of Vue JS! 🚀

A happy computer with a Vue logo on the screen, suggesting mastery of the Lifecycle Hooks.