Salesforce JavaScript Developer Practice Exam

The method used to prevent default behavior in event handling is `event.preventDefault()`. This method enables developers to intercept the standard action that would occur as a response to an event. For example, when handling a form submission, `preventDefault()` can prevent the form from actually being submitted, allowing for validation or other logic to take place first.

By calling `event.preventDefault()`, developers can create more controlled interactions within their applications, leading to better user experiences. This is particularly useful in scenarios where a default behavior conflicts with custom logic that the developer wishes to implement, such as modifying form submissions based on user input or preventing links from navigating away when clicked under certain conditions.

The other methods mentioned do not serve the same purpose. `event.stopPropagation()` is used to stop the event from bubbling up the DOM hierarchy, whereas `event.trigger()` and `event.cancel()` are not standard methods in JavaScript for event handling. Thus, knowing how to use `event.preventDefault()` is critical for effective event management in JavaScript applications, especially within the Salesforce platform where user interaction is a key component.