Html elements hgroup, output, and strong

hgroup element The HTML Headings Group Element (<hgroup>) represents the heading of a section, output element The output (<output>) element represents the result of a calculation, strong element Specifies that the enclosed text should be rendered in the browser as "strong" (usually bold) text. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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hgroup hgroup and output, hgroup, output, and strong

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