Creating a join custom function on FlutterFlow to convert a list of any type to a single string

1. Create a custom function

2. Add the function parameters

3. Write the function

4. Save the custom function

5. Click on the “set from variable” icon of text input and find the created function

6. Select the list to be used on join function

7. Select the “Map List Items” option and click on “Item in List” button

8. Select “Get Document Property” and the property to be used to convert the list item to a string

9. Add the separator argument as your needs

Result: