39. ixsl:schedule-action (1/2)

JavaScript (and JavaScript APIs) support “reliquishing control” through callbacks or, in modern parlance “promises”. SaxonJS uses ixsl:schedule-action.

There are three flavors of scheduled action:

• Wait until documents are available.

• Wait for an HTTP request to complete.

• Wait for a specified number of seconds.

You can have more than one scheduled action in progress.