The EventGridBlobTrigger makes it incredibly easy to react to new Blobs using Event Grid.
This sample demonstrates a simple use case of processing data from a given Blob using PowerShell.
For a EventGridBlobTrigger to work, you provide a path which dictates where the blobs are located inside your container, and can also help restrict the types of blobs you wish to return. For instance, you can set the path to samples/{name}.png to restrict the trigger to only the samples path and only blobs with ".png" at the end of their name.
For more information, please check out this tutorial on this new version of the Blob Storage trigger.