Ease Mixer

class Example extends Phaser.Scene
{
    constructor ()
    {
        super();
    }

    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.image('bg', 'assets/tweens/background-crt.jpg');
    }

    create ()
    {
        this.add.image(400, 300, 'bg').setScale(0.78);

        this.add.text(400, 28, 'Ease Mixer').setColor('#00ff00').setFontSize(32).setShadow(2, 2).setOrigin(0.5, 0);

        const list1 = this.createSelectList('x', 250, 80);
        const list2 = this.createSelectList('y', 425, 80);
        const button = this.createButton(580, 80);

        button.addListener('click');

        let easeX = 'Linear';
        let easeY = 'Linear';

        list1.addEventListener('change', event => {

            easeX = event.target.selectedOptions[0].value;
            graphEase();

        });

        list2.addEventListener('change', event => {

            easeY = event.target.selectedOptions[0].value;
            graphEase();

        });

        button.on('click', () => {

            graphEase();

        });

        let tween;

        //  Draw the x/y bounds
        this.add.rectangle(150, 0, 1, 600, 0xe84dff).setOrigin(0, 0);
        this.add.rectangle(650, 0, 1, 600, 0xe84dff).setOrigin(0, 0);
        this.add.rectangle(0, 150, 800, 1, 0xe84dff).setOrigin(0, 0);
        this.add.rectangle(0, 500, 800, 1, 0xe84dff).setOrigin(0, 0);

        const graph = this.add.graphics();
        const rect = this.add.rectangle(150, 500, 2, 2, 0x00ff00);
        const rt = this.add.renderTexture(400, 300, 800, 600);

        const graphEase = () => {

            if (tween)
            {
                tween.stop();
            }

            rt.clear();

            rect.setPosition(150, 500);

            graph.clear();
            graph.lineStyle(3, 0x00ff00);
            graph.beginPath();
            graph.moveTo(rect.x, rect.y);

            tween = this.tweens.add({
                targets: rect,
                x: { value: 650, ease: easeX },
                y: { value: 150, ease: easeY },
                duration: 2000,
                onUpdate: (tween, target, key) => {
                    if (key === 'x')
                    {
                        rt.draw(rect);
                        graph.lineTo(rect.x, rect.y);
                    }
                },
                onComplete: () => {
                    graph.lineTo(rect.x, rect.y);
                    graph.stroke();
                }
            });
        }
    }

    createSelectList (id, x, y)
    {
        const eases = [
            'Linear',
            'Quad.in',
            'Cubic.in',
            'Quart.in',
            'Quint.in',
            'Sine.in',
            'Expo.in',
            'Circ.in',
            'Back.in',
            'Bounce.in',
            'Quad.out',
            'Cubic.out',
            'Quart.out',
            'Quint.out',
            'Sine.out',
            'Expo.out',
            'Circ.out',
            'Back.out',
            'Bounce.out',
            'Quad.inOut',
            'Cubic.inOut',
            'Quart.inOut',
            'Quint.inOut',
            'Sine.inOut',
            'Expo.inOut',
            'Circ.inOut',
            'Back.inOut',
            'Bounce.inOut'
        ];

        const div = document.createElement('div');

        const list = document.createElement('select');

        list.id = id;

        eases.forEach(ease => {

            const option = document.createElement('option');

            option.value = ease;
            option.innerText = ease;

            list.appendChild(option);

        });

        const label = document.createElement('label');

        label.for = id;
        label.innerText = id;
        label.style = 'color: #00ff00; font: 24px Courier; padding-right: 10px';

        div.appendChild(label);
        div.appendChild(list);

        this.add.dom(x, y, div);

        return list;
    }

    createButton (x, y)
    {
        const button = document.createElement('button');

        button.innerText = 'Display';

        return this.add.dom(x, y, button);
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.AUTO,
    width: 800,
    height: 600,
    backgroundColor: '#000000',
    parent: 'game-container',
    dom: {
        createContainer: true
    },
    scene: Example
};

const game = new Phaser.Game(config);