feat: Add allowfullscreen attr for iframe

ezyang / htmlpurifier

Standards compliant HTML filter written in PHP

http://htmlpurifier.org

GNU Lesser General Public License v2.1

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Closed zerocrates closed 3 months ago

zerocrates commented 3 months ago

(closes #409)

This PR adds support for the allowfullscreen attribute for the iframe element. The attribute is only allowed when the HTML.Trusted configuration option is enabled.