Create Emitter From Config

var config = {
    type: Phaser.WEBGL,
    width: 800,
    height: 600,
    backgroundColor: '#000',
    parent: 'phaser-example',
    scene: {
        preload: preload,
        create: create
    }
};

var game = new Phaser.Game(config);

function preload ()
{
        this.load.setBaseURL('https://cdn.phaserfiles.com/v355');
    this.load.atlas('flares', 'assets/particles/flares.png', 'assets/particles/flares.json');
}

function create ()
{
    var particles = this.add.particles('flares');

    //  Create an emitter by passing in a config object directly to the Particle Manager

    var emitter = particles.createEmitter({
        frame: [ 'red', 'blue', 'green', 'yellow' ],
        x: 400,
        y: 300,
        speed: 200,
        lifespan: 3000,
        blendMode: 'ADD'
    });

    //  You can also call 'fromJSON' with the same config object:

    /*
    var emitter = particles.createEmitter();

    emitter.fromJSON({
        frame: [ 'red', 'blue', 'green', 'yellow' ],
        x: 400,
        y: 300,
        speed: 200,
        lifespan: 3000,
        blendMode: 'ADD'
    });
    */

    //  Both the above are the same as doing the following:
    //  (except using a config object is faster and more efficient)

    /*
    var emitter = particles.createEmitter();

    emitter.setFrame([ 'red', 'blue', 'green', 'yellow' ]);
    emitter.setPosition(400, 300);
    emitter.setSpeed(200);
    emitter.setLifespan(3000);
    emitter.setBlendMode('ADD');
    */
}