import './js/libs/weapp-adapter';

import * as PIXI from './js/libs/pixi.v5'

//import * as PIXI from './js/libs/pixi.v4.8.js'

const { pixelRatio, windowWidth, windowHeight } = wx.getSystemInfoSync();

let app = new PIXI.Application({

 width: windowWidth * pixelRatio,

 height: windowHeight * pixelRatio,

 antialias: true,

 transparent: false,

 view: canvas

});

报错 

VM4207:1 gameThirdScriptError
PIXI.Application is not a constructor
TypeError: PIXI.Application is not a constructor
    at http://127.0.0.1:26471/game/game.js:29:11
    at require (http://127.0.0.1:26471/game/__dev__/WAGame.js:3:13718)
    at <anonymous>:1:1

pixi 4.X版本没报错，pixi 5.X版面报错