Code Expression

Author: pinkeshmars

docs/resources/control-flow/functions/img/execute-custom-code.avif

@@ -100,6 +100,10 @@ To add inline function, open the Set from Variable dialog wherever it's possible
 
 For example, we may want to quickly calculate the discount amount of a product where the discount is 18% of the MRP of the product. The expression would be `cost - (cost * discount)`.
 
+:::tip
+Looking for more power and flexibility? Use a new [**Code Expression**](#code-expression). It’s a more advanced version of Inline Functions that lets you access FlutterFlow generated resources without passing them as arguments. You also get real-time autocomplete and inline error checking for faster, more accurate logic.
+:::
+
 **Precedence of operations**
 
 Inline Function for math operations follow typical precedence (e.g., multiplication/division before addition/subtraction), but parentheses can change the order.
@@ -162,6 +166,74 @@ Here are some common expressions you can use for your business logic:
 | `int.parse(s)`                     | Convert the **String** into an **integer.**             | `int.parse(stringValue)`   | `int`            |
 
 
+## Code Expression
+
+**Code Expression** lets you write short Dart code directly in widget property fields and action flows in FlutterFlow. It’s a more powerful version of [**Inline Function**](#inline-function-code-expressions), allowing you to directly access FlutterFlow generated classes, global variables, widget properties, parameters, and more without needing to manually pass them as inputs.
+
+Code Expressions also support real-time autocomplete, making it easy to discover available fields as you type. For example, when you type `FFAppState().`, it will suggest all available app state variables along with their types.
+
+In addition, inline validation provides immediate feedback as you write, helping you catch syntax errors or invalid property references.
+
+:::tip
+- To explore what you can access within a code expression, refer to the [**Common Examples**](../../../ff-concepts/adding-customization/common-examples.md) page.
+- Press `^ + Space` (or `Ctrl + Space`) while typing to see suggestions for what you can access in your code expression.
+- You can access values inside custom structs. For example, you can use `FFAppState().localDeviceInfo.osVersion` if that field exists in your app state.
+- To use code expressions better, it's helpful to understand how FlutterFlow builds your project behind the scenes. You can check the [**State Management**](../../../generated-code/state-mgmt-gen-code.md) page and other **Generated Code** sections to learn how everything is set up.
+
+:::
+
+Here are a couple of examples showing how to access App State and Page State within a code expression:
+
+- **App State Access:** For example, to check if dark mode is enabled using an App State variable:
+
+    ```jsx
+    FFAppState().enableDarkMode ? 'Dark Mode On' : 'Light Mode Off'
+    ```
+
+    This accesses the global `enableDarkMode` boolean stored in `FFAppState`, and returns a string based on its value.
+
+- **Page and Component State Access:** For example, to access a page or component state variable like `searchText`, you start with `_model.` and then select the variable from the autocomplete suggestions.
+
+    ```jsx
+    _model.searchText.isEmpty ? '' : 'Searching for "${_model.searchText}"'
+    ```
+
+    This expression checks if the `searchText` variable (defined as a page state) is empty, and returns an appropriate message. The `_model` object refers to the current page’s generated state model.
+
+Here's an example of adding a Code Expression:
+
+<div style={{
+    position: 'relative',
+    paddingBottom: 'calc(56.67989417989418% + 41px)', // Keeps the aspect ratio and additional padding
+    height: 0,
+    width: '100%'}}>
+    <iframe 
+        src="https://demo.arcade.software/6RV03v2ByVqRgCTeg3QF?embed&show_copy_link=true"
+        title=""
+        style={{
+            position: 'absolute',
+            top: 0,
+            left: 0,
+            width: '100%',
+            height: '100%',
+            colorScheme: 'light'
+        }}
+        frameborder="0"
+        loading="lazy"
+        webkitAllowFullScreen
+        mozAllowFullScreen
+        allowFullScreen
+        allow="clipboard-write">
+    </iframe>
+</div>
+<p></p>
+
+### Execute Custom Code [Action]
+
+To use a Code Expression when triggering actions in FlutterFlow (i.e., inside an Action Flow), you can use the **Execute Custom Code** action. This allows you to run a Dart expression when something happens, such as tapping a button or after a page loads.
+
+![execute-custom-code.avif](img/execute-custom-code.avif)
+
 
 ## Custom Functions
 
@@ -170,3 +242,18 @@ You can also use custom functions to handle slightly more complex calculations o
 :::info
 Learn more about [**Custom Functions**](../../../ff-concepts/adding-customization/custom-functions.md).
 :::
+
+## FAQS
+<details>
+<summary>
+How is a Code Expression different from an Inline Function?
+</summary>
+<p>
+Code Expressions are a more advanced and flexible version of **Inline Functions.
+
+With Inline Functions, you had to manually pass values as arguments. In contrast, Code Expressions let you directly reference FlutterFlow generated resources (such as `FFAppState()`, `_model`, context, and more) without needing to pass them in.
+
+You can write any valid Dart expression in a code expression, even multi-line logic using anonymous functions. Plus, Code Expressions support real-time autocomplete and inline error validation, making it much easier to discover available variables and avoid mistakes.
+
+</p>
+</details>