The modification is not properly placed in the sandbox, causing Apple compatibility issues

Scanning questions for code

ifram=document.createElement('iframe')span>

Problem description: The application uses an HTML iframe, but its content is not properly sandboxed

About the content of the iframe: This tag generates a designated area in which to embed other web pages.
He has an attribute value of sandbox: set the permission to embed web pages.Embedded web pages have normal permissions by default, such as executing scripts, submitting forms, pop-up windows, etc., but in order to limit the risk, HTML provides the sandbox attribute, which allows setting the permissions of the embedded web page, which is equivalent to providing an isolation layer, that is, the sandbox.It can be used as a Boolean attribute, which means that all restrictions are turned on, or restrictions can be turned on item by item. If a certain item is not set, it means that it does not have the permission.

Modify:

ifram=document.createElement('iframe')span>iframe.setAttribute('sandbox',true)

Problems after modification:
In systems above ios15.5, all client plug-ins used by the front end cannot be adjusted. The problem occurs in the newly added line of code. The specific reason is unknown., welcome to solve it.