Salesforce JavaScript Developer Practice Exam

In Lightning Web Components (LWC), executing a JavaScript function in response to a button click is accomplished by using an event handler associated with the button element. This is typically done with the `onclick` directive, which allows you to specify a JavaScript function to be executed when the button is clicked.

This method ensures that the component responds to user interactions efficiently and maintains the reactive nature of LWC, allowing for a seamless experience as events are handled appropriately within the component's lifecycle. By linking the `onclick` directive to a specific function in your JavaScript class, you establish a clear and maintainable way to manage user actions, such as button clicks.

For instance, in the HTML template of an LWC, you would define a button like so:

```html

<button onclick={handleClick}>Click Me</button>

```

In the associated JavaScript file, you would then implement the `handleClick` method to define what happens when the button is clicked.

The other choices do not correctly represent the standard and recommended way to handle button clicks in LWC. Using a timer or setInterval is not suitable for handling user events directly, and attempting direct function calls on button initialization does not engage the user interaction needed to trigger the event