Javascript change text in parent from iframe

Question

I have the following variable in a script in a webpage :

var isRedirect = true;

I also have an iframe. How can I change the isredirect value from true to false from within the iframe? var isRedirect = true; is in the parent page.

Answer 1

parent.isRedirect = false;

The tricky part is to have the correct synchronization between the parent and the iframe. To make sure the variable already exists in the parent, you can do this:

if (parent.isRedirect) {parent.isRedirect = false;}

Answer 2

应该这样做：

parent.isRedirect = true;