The JS API has something like InfoSymbol API for Flex?

[FabianoScardua]

Flex API has InfoSymbol class https://developers.arcgis.com/en/flex/sample-code/view-infosymbols.htm

Javascript has something like infoSymbol?

Best regards,

[TracySchloss]

Not exactly, no.  You need to look at the samples for popupTemplate and maybe infoWindow, infoTemplate .  There are several ways to go about displaying media like a photo.