The download file in the JAVASCRIPT mode window cannot receive the stream of the iframe

In an open mode window, an iframe is usually hidden if the flow from the server is to be received through the mode window. Sometimes, the request is then made in the form of iframe.src; Sometimes, when downloading, it is found that the server cannot receive the stream of the iframe because there is no SRC redirection event that triggers the iframe in the mode window, and normal Windows do not have this problem.

Specific solutions:

Hide an iframe in the parent window of the mode window, and the downloaded address points to the iframe.