What is the role of SupervisorJob in managing coroutines in Kotlin?

SupervisorJob in Kotlin is a special type of Job used to manage a group of coroutines, ensuring error isolation between them.

The main role of SupervisorJob is to allow child coroutines to operate independently: if one of the child coroutines fails, it does not lead to the cancellation of the other coroutines launched within this SupervisorJob.

This differs from a regular Job, where an error in one child coroutine results in the cancellation of the entire parent Job and all its children.

Example of usage:

val supervisor = SupervisorJob()
val scope = CoroutineScope(Dispatchers.Default + supervisor)

scope.launch {
    // coroutine 1
}
scope.launch {
    // coroutine 2, if it fails with an error, coroutine 1 will continue to work
}

Thus, SupervisorJob is useful when you need to launch several independent tasks, and the failure of one should not affect others.