Game States do not work as expected

[BaltaXZ]

Trying to understand state handling in Phaser. In this simple example, why does the following code log "Menu State" followed by "Game state" in the console? I would expect it to only write "Menu state", since I have not switched states anywhere in the code.

 

var game;
game = new Phaser.Game(800, 600);

game.state.add("Menu", state_menu);
game.state.add("Game", state_game);
game.state.start("Menu");


function state_menu() {

    console.log("Menu state");
    this.update = function () {

    }
}

function state_game() {

    console.log("Game state");
    this.update = function () {

    }

}

 

[BaltaXZ]

Ok, I reply myself; the reference should be an object, not a function.