The documentation you are viewing is for Dapr v1.3 which is an older version of Dapr. For up-to-date documentation, see the latest version.
Dapr extension for Azure Functions runtime
Dapr integrates with the Azure Functions runtime via an extension that lets a function seamlessly interact with Dapr. Azure Functions provides an event-driven programming model and Dapr provides cloud-native building blocks. With this extension, you can bring both together for serverless and event-driven apps. For more information read Azure Functions extension for Dapr and visit the Azure Functions extension repo to try out the samples.