Idea for generate halo points effect.

[baohuachu7]

Halo points has better effects  (as below). After checked API , I did not find example for it.  

Any suggestion to do this? 

Here is the reference for Openlayers. 

Any idea for it?

[KenBuja]

You can use the Firefly symbology

https://community.esri.com/message/762440-can-i-use-firefly-symbols-within-the-arcgis-api-for-javasc...