v2.0.1

• Restore anonymous UMD.

v1.2.3

• Restore anonymous UMD.

v2.0.0

• Export d3_queue, rather than queue, for consistency with other D3 modules.

v1.2.2

• Throw an error if queue.defer, queue.await or queue.awaitAll is passed a non-function.

v1.2.1

• If a task errors, abort any active tasks (as when calling queue.abort).
• On abort, also dispose any references to tasks and results.
• If a task invokes its callback more than once, ignore subsequent invocations.
• If a task throws a synchronous error on start, treat this as invoking the callback.
• If a task throws a synchronous error on abort, ignore it.

v1.2.0

• Add queue.abort.

v1.1.1

• Throw an error if the specified parallelism is not at least one.
• Avoid recursion if a task defers another task.
• Minor optimizations.

v1.1.0

• Adopt Rollup.
• Note to Bower users: you may need to bower cache clean before installing.