js method to implement iframe to get parent window URL address

This article describes the method of JS to implement iframe to get the parent window URL address. Share it for your reference. The specific implementation method is as follows:

 var url='';try { url = window.top.document.referrer ; } catch(M) { if (window.parent) { try { url = window.parent.document.referrer; } catch(L) { url = ""; } } } } if (url === "") { url = document.referrer;}

The above code has been executed in the browser and the address can be retrieved.

I hope this article will be helpful to everyone's JavaScript programming.