Html elements iframe, hgroup, and canvas

iframe element Defines an inline frame (ie a frame embedded in a document), hgroup element The HTML Headings Group Element (<hgroup>) represents the heading of a section, canvas element The Canvas (<canvas>) HTML element can be used to draw graphics via scripting (usually JavaScript). These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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iframe iframe and hgroup, iframe, hgroup, and canvas

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