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Summary of JavaScript cross-domain solutions (code)

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2019-03-26 09:33:402198browse

This article brings you a summary (code) of cross-domain solutions. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you. .

Same origin policy: the protocol, domain name, and port are all the same.

Non-original restriction:

Cookie, localStorage, and indexDB cannot be read.

DOM cannot be obtained.

The AJAX request cannot be sent.

Solution:

1. JSONP

Principle: Request JSON data from the server by dynamically adding a