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This article is about the cross-domain use of iframe in web development. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Under the same origin:

The parent page can access iframe's global variables, DOM tree, and so on directly through iframe.contentWindow, and iframe can also do the same thing to the parent page through parent/top.

Under different origin:

The standard method is to communicate with each other through .postMessage (). The non-standard method is to use tricks such as location.hash. Protocol, domain name, port number, together determine an origin.

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