let sharedCanvas = wx.getSharedCanvas();

let sharedContext = sharedCanvas.getContext('2d')

let canvas = wx.createCanvas();

canvas.width = sharedCanvas.width;

canvas.height = sharedCanvas.height;

wx.onMessage(data => {

 sharedContext.drawImage(canvas, 0, 0);

});

以上代码会报错，同样会报错的还有wx.createImage返回的对象一样会报错，这个刚才看到论坛里有一样的问题，到现在仍然没解决。

如果不在wx.onMessage理调用，比如直接在代码段里调用是没问题的，只要是在wx.xxxx的回调里执行都会报错，希望尽快解决这个问题。

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gameSubContextThirdScriptError
Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)';at onMessage callback function
TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)'
    at CanvasRenderingContext2D.t.(anonymous function) (http://127.0.0.1:57565/game/__dev__/WAGame.js:12:17613)
    at CanvasRenderingContext2D.e.(anonymous function) [as drawImage] (http://127.0.0.1:57565/game/__dev__/WAGame.js:12:18953)
    at Function.<anonymous> (http://127.0.0.1:57565/game/js/open/index.js:11:17)
    at f.<anonymous> (http://127.0.0.1:57565/game/__subdev__/WAGameSubContext.js:4:26185)
    at f.emit (http://127.0.0.1:57565/game/__subdev__/WAGameSubContext.js:4:453)
    at http://127.0.0.1:57565/game/__subdev__/WAGameSubContext.js:4:8953
    at Object.p [as subscribeHandler] (http://127.0.0.1:57565/game/__subdev__/WAGameSubContext.js:3:13572)
    at http://127.0.0.1:57565/game/__dev__/WAGame.js:3:16001
    at Array.forEach (<anonymous>)
    at Object.S [as publish] (http://127.0.0.1:57565/game/__dev__/WAGame.js:3:15965)