Web Messaging

HTML
Comparisons

Web Messaging, or cross-document messaging, is an API introduced in the WHATWG HTML5 draft specification, allowing documents to communicate with one another across different origins, or source domains[1] while rendered in a web browser. Prior to HTML5, web browsers disallowed cross-site scripting, to protect against security attacks. This practice barred communication between non-hostile pages as well, making document interaction of any kind difficult.[1][2] Cross-document messaging allows scripts to interact across these boundaries, while providing a rudimentary level of security.

  1. ^ a b Cite error: The named reference WHATWG was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference WebKit was invoked but never defined (see the help page).