Error: "A boolean is being passed as a fourth parameter to window.open"

[tbebekis]

The two samples, server and client, found in https://developer.paypal.com/demo/checkout end up in an exception saying:

"A boolean is being passed as a fourth parameter to window.open. This is not used and may cause an exception in a future release."

And two warnings:

1. Indicate whether a cookie is intended to be set in a cross-site context by specifying its SameSite attribute

2. Indicate whether to send a cookie in a cross-site request by specifying its SameSite attribute

Is there any workaround?

Steps to reproduce

1. copy the source found in https://developer.paypal.com/demo/checkout/#/pattern/client

2. paste it to a text file and save it as HTML

3. set a proper ClientId in the source, i.e. https://www.paypal.com/sdk/js?client-id=PUT_YOUR_CLIENT_ID_HERE&currency=USD

4. open the HTML file with a browser and click the button