Apple Pay SDK on Chrome Failed to execute postMessage on 'Window'

Question

Created Apr ’25

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Hello I'm getting an error when the Apple Pay sheet opens on a third party browser like Chrome when completeShippingMethodSelection is called

'DataCloneError: Failed to execute 'postMessage' on 'Window': #<Object> could not be cloned.'

Screenshot 2025-04-01 at 12.38.48 PM.png

I'm also seeing this warning when the apple pay sheet opens


Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('https://applepay.cdn-apple.com') does not match the recipient window's origin

although I also see this warning on https://applepaydemo.apple.com/

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Answer 1

kliu33 OP

Apr ’25

Accepted Answer

so it ended up being incorrect value types passed into completeShippingMethodSelection

i.e. amount is supposed to be number and not string

    "label": "Label",
    "amount": "136.69"
  },

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