SuppressedError() constructor

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The SuppressedError() constructor creates SuppressedError objects.

Syntax

new SuppressedError(error, suppressed)
new SuppressedError(error, suppressed, message)

SuppressedError(error, suppressed)
SuppressedError(error, suppressed, message)

Note: SuppressedError() can be called with or without new. Both create a new SuppressedError instance.

Parameters

error: The new error that results in the suppression of suppressed.
suppressed: The error that was originally thrown and is now suppressed.
message Optional: An optional human-readable description of the aggregate error.

Note: SuppressedError() does not accept options like Error() and other subclasses do, because the semantics of cause overlaps with suppressed.

Examples

Creating a SuppressedError

try {
  throw new SuppressedError(
    new Error("New error"),
    new Error("Original error"),
    "Hello",
  );
} catch (e) {
  console.log(e.suppressed); // Error: "Original error"
  console.log(e.error); // Error: "New error"
}