data
(UploadRawData | UploadFile)[] - The post data to be sent to the new window.contentType
string - Thecontent-type
header used for the data. One ofapplication/x-www-form-urlencoded
ormultipart/form-data
. Corresponds to theenctype
attribute of the submitted HTML form.boundary
string (optional) - The boundary used to separate multiple parts of the message. Only valid whencontentType
ismultipart/form-data
.