Power Fx and cards overview

Power Fx is a low-code programming language available across the Power Platform, including in Power Apps cards. Cards can calculate values, perform tasks, and respond to user input using formulas expressed in Power Fx. Power Fx expressions can also update variables and data sources. Expressions can be combined to create complex formulas that can handle advanced business logic.

Power Fx documentation

For more information on Power Fx formulas that work in cards, see Formula reference for Cards. When you're working with cards, you'll also find the following articles especially helpful:

• Expression grammar
• Operators
• Variables
• Formula reference

For more information on Power Fx formulas that work in cards, see Formula reference for Cards.

Important

Defaults isn't supported. Instead use Collect, for example, instead of Patch(account, Defaults(account), {"Account Name": "Example Account"}) use Collect(account, {"Account Name": "Example Account"}).

Large tables (delegation)

Working with large data sets in cards can impact performance. Take heed of delegation warnings. Learn more about delegation.

Cards supports delegating the following functions:

• LookUp

Dataverse types

Cards don't support Image, URL, File, or ManagedProperty column types yet.