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cleanly destroying a custom gameobject

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I have a dialogue box object that I custom made for an adventure/shooter game. In the code below, the custom object has a graphic component to draw a black background. when I use the  "destroy" method, only the text goes away.  thank you for any help


var config = {
    type: Phaser.AUTO,
    width: 800,
    height: 600,
    parent: 'phaser-example',
    scene: {
        create: create,
        update: update

var game = new Phaser.Game(config);
var dialogue;
//var timerEvent;
//var count = 0;

//var str = "this is the test string that will be used for this demo";

class DialogueBox extends Phaser.GameObjects.Text {
        super(params.scene, params.x + 10, params.y + 10, '',;
        this.setDepth(1); =;, 1);, params.y, 1000, 200);
        this.strcontent = params.text;
        this.timerEvent = params.scene.time.addEvent({ delay: 50, repeat: params.text.length });
        this.count = 0;


        if(progress > 0.98){
            this.count += 1;

function create() 

    //  Pass in a basic style object with the constructor
    //dialogue = this.add.text(10, 200, ' ', { fontFamily: 'Arial', fontSize: 16, color: '#ffffff' }).setDepth(1);

    //timerEvent = this.time.addEvent({ delay: 50, repeat: str.length });

    dialogue = new  DialogueBox({scene: this, x: 0, y: 200, text:"this is the test string that will be used for this demo", style:{ fontFamily: 'Arial', fontSize: 16, color: '#ffffff' }});
    this.input.keyboard.on('keydown', function (event) {

function update(){

/*function renderText(progress){
    if(progress > 0.98){


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In Phaser 3 only Containers can contain other game objects, so in this case you are adding your graphics separately to the scene. When you call destroy(), only the text object is destroyed and the graphics remains as it is not "connected" to the text object. You could put both inside a container and then destroy container and it should destroy both text and graphics. Since you don't have many objects to put into container in this case, I think you should avoid it and just call another destroy on the graphics.

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