Export As - Batch Process?

Export As is not recordable so you can not record as action step. It was never recordable. If you want to use action then try with Save for Web which offers similar featuires. Another batch processing option with useful features for web is Image Processor Pro.

@Bhavin Khona – You can't... However, what you can do is use a script to load files into layers, reveal all, then select all layers and right click in the layers panel and select export as, to batch export all layers trimmed to transparency.

Otherwise the traditional action or script based methods are more common (save as or save for web).

Adobe Camera Raw can also batch save supported file formats.