How to use iframe across domains

This time I will bring you the cross-domain usage of iframe. We know that in the front-end interface, we often use the iframe tag, so what are the precautions for the cross-domain use of iframe, as follows This is a practical case, let’s take a look at it.

Under the same origin:
The parent page can directly access the iframe's global variables, DOM tree, etc. through iframe.contentWindow. The iframe can also do the same to the parent page through parent/top. things.

Under different origins:
The standard method is to communicate with each other through .postMessage(), and the non-standard method is to use location.hash and other tricks. The protocol, domain name, and port number jointly determine an origin.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to the php Chinese website Other related articles!

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