Browser homology policy

describe ：
Homology policy is an important security policy , It is used to limit one origin How can a document or script it loads interact with another source's resources . He can help block malicious files , Reduce the media that may be attacked .
Homology ：
agreement + domain name ( The main domain name 、 subdomain )+ port Three are the same
Narration ：
Most of the content in the browser is restricted by the same origin policy ( Loading images of img label 、 quote css Of kink label 、 quote js The script script label There is no limit on the )
To solve the cross domain ：...