safeCallback

Runs a callback in a safe block. If the callback throws, the function returns a "callback" typed Left instead of propagating the exception. If the callback returns an Either, it is kept as-is.

Interactive example

Syntax

function safeCallback<
	GenericOutput extends unknown
>(
	theFunction: () => GenericOutput
): ComputeSafeCallbackResult<GenericOutput> | CallbackError;

Parameters

• theFunction : Callback to execute in a safe block.

Return value

• If the callback returns an Left or Right: the Either is returned as-is.
• If the callback succeeds with a non-Either value: the value is wrapped in CallbackSuccess.
• If the callback throws: CallbackError (alias of left("callback", error)).

See also

• left – Build a typed Left.
• whenHasInformation – Pattern match on "callback".