Introduction to Events in Vue.js

Hello, students! Welcome to Lesson 1 of Event Handling in Vue.js. Today, we will learn about events in Vue.js.

What are events?

Events are occurrences that happen in the DOM. They can be caused by user actions, such as clicking a button, or by system events, such as resizing the browser window.

Why handle events?

Handling events is important because it allows us to respond to user actions and system events. For example, we can use events to:

• Enable or disable DOM elements.
• Start or stop animations.
• Update application data.

How to listen to events?

To listen to events in Vue.js, we use the v-on directive. The v-on directive allows associating an event with a method.

Syntax of the v-on directive

The basic syntax of the v-on directive is as follows:

<element v-on:event="method">

Where:

• event is the name of the event you want to listen to.
• method is the method that will be called when the event occurs.

Example

Let’s see an example of how to use the v-on directive to listen to the click event and activate a button:

<button v-on:click="activateButton">Activate</button>

In the example above, the activateButton() method will be called when the user clicks the button.

Types of events

There are many types of events that can be listened to in Vue.js. Some examples of common events include:

• click: The click event is triggered when the user clicks an element.
• keyup: The keyup event is triggered when the user presses a key.
• change: The change event is triggered when the user changes the value of an input element.

Conclusion

Events are an important part of any JavaScript application. In Vue.js, we can use the v-on directive to listen to events and respond to user actions and system events.

In the next lesson, we will learn how to use the v-on directive to listen to events and respond to them.

Challenge

Here’s a challenge for you:

• Create a Vue.js application that displays a list of tasks. Each task should have a “completed” button. Clicking the button should mark the task as completed.

Good luck!

Tip

You can use the v-on directive to create a component that can be used to render a list of any type of data.