Flex API has InfoSymbol class https://developers.arcgis.com/en/flex/sample-code/view-infosymbols.htm
Javascript has something like infoSymbol?
Not to my knowledge - the class doesn't exist in the JSAPI. Would something like this sample help?
Add a topographic map with graphics | ArcGIS API for JavaScript
That is not what I expect. The above example is the infoTemplate. The symbol is visible Here I want is as below:
What about hiding a Point symbol (opacity set to 0%) and trying to show the infoTemplate without user interaction (I haven't tried this but seems possible).