Tab close issue on IE and Edge

Last 3-4 days maybe more I don’t know in IE 11 and Edge giving us strange error only in the pages that has paypal.js initialized. If you land a page that has the paypal express in it, doing nothing and try to leave that page with anything (click back or visit a link in that page), an alert window pops up. This is the exact error you get when you run window.close() on IE or Edge.

“do you want to close the tab - Yes | No”

I am currently on Mac so I cannot reproduce this issue with Chrome thus I can’t provide screenshots.

This is how I initialize PayPal in our product pages.

paypal.Buttons({
            style: {
                size: 'responsive',
                color: 'white',
                shape: 'rect',
                label :'buynow',
                layout: 'horizontal'
            },
            createOrder: this.payment,
            onApprove: this.authorize,
            onInit: this.validate,
            onShippingChange: this.shippingChange,
            //onError: this.error,
            onCancel: this.error,
            onClick: () => {this.modalClose.trigger('click')}
        }).render('#paypal-action');

Steps to reproduce

It’s simple just go to a page that has the paypal scripts in it. Do nothing and click your browser’s back button.

Affected browsers

• Edge
• IE

[nick-andersen]

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