namespace Deno.errors

A set of error constructors that are raised by Deno APIs.

Can be used to provide more specific handling of failures within code which is using Deno APIs. For example, handling attempting to open a file which does not exist:

try {
  const file = await Deno.open("./some/file.txt");
} catch (error) {
  if (error instanceof Deno.errors.NotFound) {
    console.error("the file was not found");
  } else {
    // otherwise re-throw
    throw error;
  }
}

Classes

c Deno.errors.AddrInUse	Raised when attempting to open a server listener on an address and port that already has a listener.
c Deno.errors.AddrNotAvailable	Raised when the underlying operating system reports an `EADDRNOTAVAIL` error.
c Deno.errors.AlreadyExists	Raised when trying to create a resource, like a file, that already exits.
c Deno.errors.BadResource	The underlying IO resource is invalid or closed, and so the operation could not be performed.
c Deno.errors.BrokenPipe	Raised when trying to write to a resource and a broken pipe error occurs. This can happen when trying to write directly to `stdout` or `stderr` and the operating system is unable to pipe the output for a reason external to the Deno runtime.
c Deno.errors.Busy	Raised when the underlying IO resource is not available because it is being awaited on in another block of code.
c Deno.errors.ConnectionAborted	Raised when the underlying operating system reports an `ECONNABORTED` error.
c Deno.errors.ConnectionRefused	Raised when the underlying operating system reports that a connection to a resource is refused.
c Deno.errors.ConnectionReset	Raised when the underlying operating system reports that a connection has been reset. With network servers, it can be a normal occurrence where a client will abort a connection instead of properly shutting it down.
c Deno.errors.FilesystemLoop	Raised when too many symbolic links were encountered when resolving the filename.
c Deno.errors.Http	Raised in situations where when attempting to load a dynamic import, too many redirects were encountered.
c Deno.errors.Interrupted	Raised when the underlying operating system reports an `EINTR` error. In many cases, this underlying IO error will be handled internally within Deno, or result in an @{link BadResource} error instead.
c Deno.errors.InvalidData	Raised when an operation to returns data that is invalid for the operation being performed.
c Deno.errors.IsADirectory	Raised when trying to open, create or write to a directory.
c Deno.errors.NetworkUnreachable	Raised when performing a socket operation but the remote host is not reachable.
c Deno.errors.NotADirectory	Raised when trying to perform an operation on a path that is not a directory, when directory is required.
c Deno.errors.NotConnected	Raised when the underlying operating system reports an `ENOTCONN` error.
c Deno.errors.NotFound	Raised when the underlying operating system indicates that the file was not found.
c Deno.errors.NotSupported	Raised when the underlying Deno API is asked to perform a function that is not currently supported.
c Deno.errors.PermissionDenied	Raised when the underlying operating system indicates the current user which the Deno process is running under does not have the appropriate permissions to a file or resource, or the user did not provide required `--allow-*` flag.
c Deno.errors.TimedOut	Raised when the underlying operating system reports that an I/O operation has timed out (`ETIMEDOUT`).
c Deno.errors.UnexpectedEof	Raised when attempting to read bytes from a resource, but the EOF was unexpectedly encountered.
c Deno.errors.WouldBlock	Raised when the underlying operating system would need to block to complete but an asynchronous (non-blocking) API is used.
c Deno.errors.WriteZero	Raised when expecting to write to a IO buffer resulted in zero bytes being written.