Vue warn]: Error in v-on handler: "TypeError: wx.scanQRCode is not a function"

This error occurs when you are trying to call a function named "wx.scanQRCode" in your Vue application, but it is not defined or loaded properly.

The most common reason for this error is that you are trying to use a WeChat API function in a non-WeChat environment. "wx" is the global object provided by WeChat, and if you are not running your Vue application in a WeChat Mini Program environment, this object will not be available.

To resolve this issue, make sure that you are running your Vue application in a WeChat Mini Program environment. If you are not, you will need to find an alternative method for scanning QR codes that is compatible with your environment.