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AllowSeamless

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Revision as of 01:33, 24 May 2012 by Abarth (talk | contribs)
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Overview

Currently, seamless iframes work only with same-origin document because otherwise the parent document could steal information from the child document. There are use cases (see below) for using seamless iframes with cross-origin documents. This proposal provides a way for documents to opt into being seamless with cross-origin parents.

Security Concerns

Use Cases

Proposal

Security Analysis

Examples

<html allowseamless>
<body>
If my parent iframe has the seamless attribute, then <a href="http://example.com">this
example link</a> will navigate my parent and the iframe will autosize to the right height
 and width.
</body>


<html allowseamless="inherit-style">
<body>
Now in addition to the above, I will inherit styles from my parent. Inheriting styles requires
an additional opt-in because letting my parent style me could leak more information (such
as the value of form input elements) to my parent.
</body>