Understanding the ID Parameter of Dash Components

Let’s now look at how to identify components by setting their id values. After that, we’ll learn how to declare a component as Input or Output.

The id parameter of Dash components

Every Dash component has an id parameter that we can easily set in order to uniquely identify it. There is actually nothing more to this parameter than making sure that our components have unique and descriptive names.

Using descriptive and explicit names for the id parameter becomes more important as the app grows in complexity. This parameter is optional when there is no interactivity, but it becomes mandatory when there is. The following example snippet shows how easy it is to set the id parameter for a basic use case: