https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/JS-SDK.html

onmessage SyntaxError: Unexpected token o in JSON at position 1

    at JSON.parse (<anonymous>)

    at Object.e._complete (jweixin-1.6.0.js:1)

    at V (jweixin-1.6.0.js:1)

    at Object.cb (jweixin-1.6.0.js:1)

    at e.exports.<anonymous> (index.js:9)

    at index.js:9

    at Set.forEach (<anonymous>)

    at WebSocket._ws.onmessage (index.js:9)