PostBody Object
data(UploadRawData | UploadFile)[] - The post data to be sent to the new window.contentTypestring - Thecontent-typeheader used for the data. One ofapplication/x-www-form-urlencodedormultipart/form-data. Corresponds to theenctypeattribute of the submitted HTML form.boundarystring (optional) - The boundary used to separate multiple parts of the message. Only valid whencontentTypeismultipart/form-data.