project is a mobile terminal developed by vue. The APP is packaged with hbuilder. After initiating the backend interface, the page returns a from form, and then calls Alipay mobile client payment. Is the back-end callback to APP when the payment is successful 
? And how can I jump to the payment success page according to whether he has successfully paid?
add: the same is true for the WeChat Pay process, which calls the background interface and returns the url payment link
. The user clicks and selects to pay
. Users choose which payment method, the red area is Alipay
. Call the backend interface, return the url payment link at the backend, and then operate paySuccessHref
after success. Jump to the payment success page
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