FPFrancis Paul Antony Raj Syncfusion Team January 27, 2016 10:37 AM UTC
Thanks for contacting Syncfusion support.
Yes, you can achieve your requirement “Collapse all the header and content panel” using “collapseAll()” method. You need to set the ejAccoridon’s,Collapsible property value to true to enable the collapsible state of the Accordion. Please refer to the following code snippet.