To HTML Content Category Interactive

Html elements iframe, script, and audio

iframe element Defines an inline frame (ie a frame embedded in a document), script element Specifies that the enclosed content is a client-side script, audio element The audio element is used to embed sound content in an HTML or XHTML document. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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iframe iframe and script, iframe, script, and audio

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