Use particle emitter to scale up then scale down particles, or yoyo effect?

Phaser 3
1

Using the Phaser3 particle emitters, is it possible to first scale up then scale down particles?

I was looking at examples in this video about Particle Effects in Smash Brothers and I would like to recreate the sparkling effects at 1:44 in the video.

smash_bros_particles_grow_shrink
smash_bros_particles_grow_shrink1200×200 206 KB

It uses a fairly standard flash graphic as particles, but they need to grow to appear then shrink to disappear.

I know I can set the scale property with a start and end value, but then I can only make it either grow (start small end big) or shrink (start big end small).

        this.flasheffect = this.add.particles(0, 0, "sprites", {
            frame: ["flash1", "flash2", "flash3"], // random three colors
            x: { min: 100, max: 400 },
            y: { min: 100, max: 200 },
            lifespan: 400,
            scale: { start: 1.0, end: 0.0 },
            quantity: 20,
            frequency: 100,
            emitting: false
        });

        this.flasheffect.start();

Is there a way to make the particles scale with more key-frames than just the two start/end? Or maybe use the yoyo effect?

2

You can use a custom ease function.