PayPal Checkout with Vue and Typescript error on building for production

[AlbertoLO]

 am using the javascript framework to integrate Paypal checkout and vue.

I have everything working in my development enviroment, but when I try to build for production I get this error message.

Cannot find name 'paypal'. Did you mean the instance member 'this.paypal'?

I have declared paypal as any and use this.paypal but it does not work.

Any advice on how to make it build for production.

thanks Alberto