I couldn’t find a browsable list of valid Drupal core values for #type fields in render arrays. I just wanted to know what was possible in one place. Andy Blum’s Drupal Smart Snippet’s plugin is great for writing the array, but you need to know what keyword you’re looking for.
So I filtered the data Andy uses for the plugin, and came up with a list of all the valid types!
For anyone else having this specific problem, mostly being my future self, here you go.
Valid Drupal #types
actionsajaxbuttoncheckboxcheckboxescolorcontainerdatedetailsdropbuttonemailfieldgroupfieldsetfileformhiddenhtmlhtml_taghtmltagimagebuttoninline_templateinlinetemplateitemlabellanguageselectlinkmachine_namemachinenamemore_linkmorelinknumberoperationspagepagerpagetitlepasswordpassword_confirmpasswordconfirmpathelementradioradiosrangesearchselectstatus_messagesstatusmessagesstatusreportsubmitsystem_compact_linksystemcompactlinktabletableselectteltextareatextfieldtokenurlvaluevertical_tabsverticaltabsweight