this.game.math.chanceRoll is not a function

[KelvinSP]

I am trying to run the following example on my machine:
https://gamemechanicexplorer.com/#lightning-5

The effect works but the thunder is not showed. I'm getting this error from the browser console:

Uncaught TypeError: this.game.math.chanceRoll is not a function

In my structure I have the assets folder with all images, the main.js file with the game logic, the index.html and the phaser.min.js file.

Note: I'm very newbie on Phaser, then please explain to me what is happen and what can I do.

Thanks

[samme]

chanceRoll is in Phaser.Utils.chanceRoll() now. The example uses an older Phaser.

[KelvinSP]

Thank you so much. Changing this.game.math.chanceRoll to Phaser.Utils.chanceRoll() worked.