SP.WorkflowServices.WorkflowSubscription.enabled property (sp.workflowservices)
Gets or sets a Boolean value that enables or disables the workflow subscription. When disabled, new instances of the subscription cannot be started, but existing instances will continue to run.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.WorkflowServices.WorkflowSubscription.get_enabled()
SP.WorkflowServices.WorkflowSubscription.set_enabled(value)
Return value
Returns true to enable the subscription. Otherwise returns false.