Overview
Design
Frontend
Fullstack
Create Website
Blog
Frontend
Docs
->
Best Practices
->
Optional Arguments
Docs
Book 🚧
Learn
Why Use fastn for Your Next Frontend?
Getting Started
Data Modelling
Variables
Built-in Types
record
or-type
list
component
Headers
Visibility
Commenting
Kernel Components
ftd.document 🚧
ftd.row
ftd.column
ftd.container
ftd.text
ftd.image
ftd.rive
ftd.iframe
ftd.integer
ftd.decimal
ftd.boolean
ftd.code
ftd.text-input
ftd.checkbox
ftd.desktop
ftd.mobile
Attributes
Common Attributes
Text Attributes
Container Attributes
Container Root Attributes
import
Using export/exposing
Functions
Built-in Functions
Built-in Rive Functions
Built-in Variables
ftd Events
Rive Events
Use color scheme package
processor
foreign variables
assets
How to access files
How to access fonts
How to make page responsive
Using JS
JS in function
Web Component
Create fastn package
Best Practices
Formatting
Import
Auto-import
Device
Conditions
Container
Same argument & attribute types
FScript
Inherited Types
Variable & it’s Type
Optional Arguments
Commenting
Self referencing
Property

Optional Arguments

not-null-opt-arg: Optional Arguments must have !NULL condition

This coding principle emphasizes the importance of using if-condition for optional arguments or variables, and ensuring that they have a “not null” condition.

By doing so, it helps prevent unexpected errors or bugs in the code that can arise from assuming the presence of optional arguments or variables without checking their values first.
Not recommended
-- component school:
optional string name:

-- ftd.text: $school.name


-- end: school
Lang:
ftd
Recommended
-- component school:
optional string name:

-- ftd.text: $school.name
if: { school.name != NULL }

-- end: school
Lang:
ftd

Support fastn!

Enjoying fastn? Please consider giving us a star ⭐️ on GitHub to show your support!
⭐️

Getting Help

Have a question or need help?

Visit our GitHub Q&A discussion to get answers and subscribe to it to stay tuned.

Join our Discord channel and share your thoughts, suggestion, question etc.

Connect with our community!
💻️

Found an issue?

If you find some issue, please visit our GitHub issues to tell us about it.

Join us

We welcome you to join our Discord community today.

We are trying to create the language for human beings and we do not believe it would be possible without your support. We would love to hear from you.
Copyright © 2023 - FifthTry.com