SAML integration with Okta Sign In Widget


i have an angular 5 application which authenticates user using OKTA openID with Okta sign in widget. Now, i want to change the the authentication mechanism from OpenID to SAML using the same Okta sign in widget. But, looks like I am unable to find proper documentation or examples where I could get some reference. First of all I would like to know whether is it possible to do so? or not.

Please do help me by replying to this thread.