example.gd

"""
This example uses a simple scene with a Control node as the root and a single Button as a child, 
but could be applied to any case scenario.
"""

extends Control

func _ready():
	$Button.connect("pressed", self, "on_pressed", [$Button.name, $Button.text, $Button.CUSTOM_VAR])
  # @CUSTOM_VAR if the button has its own script

func on_pressed(_button_name : String, _button_text : String, _button_custom_var : Variant):
	print("The button named %s was pressed, containing '%s' in its text and with a custom variant: %s"%[_button_name, _button_text, _buttom_custom_var])

example2.gd

New Gdscript file!