<mark> semantic HTML element represents part of a text that should be rendered as marked or highlighted, due to being particularly relevant in its specific context. It can be used to draw the reader’s attention to a specific word, phrase, or section.
<mark><!-- Mark content goes inside the tag --></mark>
<mark> element requires an opening and closing tag that wraps around a block of text. By default, browsers will render it as a black font on a yellow background, but this can be restyled via CSS.
In the example below, the
<mark> element is used to highlight important words and phrases:
<p><!-- Main concepts in the paragraph are in <mark> tags and will be highlighted -->The <mark>properties</mark> of the noble gases can be well explained by modern theories of atomic structure: Their <mark>outer shell of valence electrons</mark> is considered to be <mark>"full"</mark>, giving them little tendency to participate in chemical reactions, and it has been possible to prepare only a few hundred noble gas compounds. The melting and boiling points for a given noble gas are close together, differing by less than 10 °C (18 °F); that is, they are <mark>liquids over only a small temperature range</mark>.</p>
The resulting markup would look like this:
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