fix window present precondition

Luehang / react-paypal-button-v2

An easy and simple to use React button component to implement PayPal Checkout with Smart Payment Buttons V2 (Version 2).

MIT License

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Open fschindler opened 4 years ago

fschindler commented 4 years ago

Probably we should return null if the PayPal OR window isn't present/ready.

Otherwise we could get a Cannot read property '...' of undefined Error in line 183.