How to export variables in godot 4.0?

Question

I got a Godot 4.0 unstable build off of https://hugo.pro/projects/godot-builds/ today. I found that some keywords don't work. Mainly, what do you do in the place of export, and onready?

Answer 1

@export and @onready. It would be nice if the documentation for 4.0 was finished.

Comments

How do you use it? To export a Node3D variable, what do you do?
I tried this:
@export(Node3D) var follow, but It didn't work

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I also tried doing @export var follow: Node3D, @export var follow: Node3D = Node3D.new(), @export var follow: Node3D = null, and @export var follow = Node3D.new()

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Unfortunately, there are still a lot of bugs:

https://github.com/godotengine/godot/issues/41690

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The documentation is being updated here: https://github.com/godotengine/godot-docs/pull/3623

See also https://godotengine.org/article/gdscript-progress-report-new-gdscript-now-merged

Answer 2

For normal variables:

@export var health : int

NodePath export has been changed to this:

@export_node_path(Resource) var resource_name

Comments

Thanks! This is what I was searching for. Where did you get the information about @exportnodepath if you don't mind me asking?

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sadly you can't add :Array to an @exportnodepath

@export_node_path(Marker2D) var waypoints: Array

*this wouldnt work..

But you can do in fact.

@export var waypoints: Array

Then you get a NIL Entry, you can change the size of the array and with a click on the PEN, you can define what kind of Node it should be.. There you can select node_path and select your desired nodes. But doesnt work anymore in one script line..

Took me ages to figure it out as there is still no documentation for this.

Answer 3

Since Godot 4.0, nodes can be directly exported as properties in a script without having to use NodePaths

# Allows any node.
@export var node: Node

# Allows any node that inherits from BaseButton.
# Custom classes declared with `class_name` can also be used.
@export var some_button: BaseButton