Godot - Get button node in click event not working

Question

How we can get the button reference on the event function that is connected? My connect signals never works

extends PanelContainer

onready var hbox_container = $ScrollContainer/HBoxContainer
var btn 

func _ready():
    createbutton()

func createbutton():
    btn = Button.new()
    btn.set_name("button 1")
    btn.text = "button 1"
    hbox_container.add_child(btn)
    btn.connect("toggled", self, "button_toggled", [btn])

func button_toggled(toggled, target):
    print("which button = ", target.get_name())
    if toggled == true:
        print("Button ist pressed")
    else: 
        print("Button is released")

Answer 1

You need to set the toggle_mode

extends PanelContainer

var btn:Button

func _ready():
    createbutton()

func createbutton():
    btn = Button.new()
    btn.set_name("button 1")
    btn.text = "button 1"

    btn.toggle_mode = true

    add_child(btn)
    btn.connect("toggled", self, "button_toggled", [btn])

func button_toggled(toggled, target):
    print("which button = ", target.get_name())
    if toggled == true:
        print("Button ist pressed")
    else: 
        print("Button is released")

I removed onready var hbox_container = $ScrollContainer/HBoxContainer for brevity

It is best to type variable to get autocomplete to work like var btn:Button done above.