SP へClientContext.hasPendingRequest プロパティ (sp.js)
Gets a value that indicates whether the client context has a pending request.
**適用対象:**apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.ClientContext.get_hasPendingRequest()
戻り値
Boolean
true if the client context has a pending request; otherwise false.