Js can listen to F5 page to refresh sub-iframe without refreshing the parent page

Js can listen to the F5 page to refresh the sub-iframe while the parent page does not refresh. The focus is to prevent the default refresh. In this way, the external page will not be refreshed, and then the iframe will be refreshed. I will give you the idea below.

Document. onkeypress = function (e) {if (e. keyCode = 116) {e. preventDefault (); // The default var iframeSrc = iframe. src; iframe. src = iframeSrc ;}}

On the iframe page, write the following code:

Var iframeSrc = parent. iframe. src; document. onkeypress = function (e) {e. preventDefault (); parent. frame. src = iframeSrc ;}