[PIXI] Correct way to initialize an Application?

Hi Everyone,

Browsing through the Pixi docs, it looks like the correct way to initialize a Pixi app with an initial width and height is:

let app = Pixi.Application({width: 500, height: 500});

It looks like Application only takes a single options argument.

http://pixijs.download/release/docs/PIXI.Application.html#stage

However, the examples use this format:

var app = new PIXI.Application(800, 600);

http://pixijs.github.io/examples/#/basics/basic.js

The above is how v3 used to do it - is this now deprecated, and is the format in the Doc the most up to date?