In every new Qlik Sense release, we see some cool additions and features that make our life easier. All of the major ones, are discussed here, https://community.qlik.com/blogs/qlikproductinnovation/2018/09/11/qlik-sense-september-2018-has-arri..., but for those that work a lot with the Capability Api, there are 3 very much desired and long expected features: exportData, exportImg and exportPdf. With these, you can export any embedded object from your mashup in the above formats. You can also customize them by passing the desired options.
Below are the links to the help files so you can experiment more.