For those who waht to code online with Phaser you can check this
https://phaser.io/sandbox
Has they say:
"
The Phaser 2 Sandbox allows you to code games in your browser without having to download or install anything.
The powerful editor features Phaser code assists, JavaScript snippets and lots of the features you've come to love in editors like Sublime and Brackets.
Once finished you can save, export or share your game.
"