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Available in 1 language" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-1" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">1 language</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Formula:Murmur" title="Formula:Murmur – Latin" lang="la" hreflang="la" data-title="Formula:Murmur" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q121133133#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-template" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Template:HTML_comment" title="View the template [c]" accesskey="c"><span>Template</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Template_talk:HTML_comment&action=edit&redlink=1" rel="discussion" class="new" title="Discuss improvements to the content page (page does not exist) [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Template:HTML_comment"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Template:HTML_comment&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Template:HTML_comment&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Template:HTML_comment"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Template:HTML_comment&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Template:HTML_comment&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/Template:HTML_comment" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/Template:HTML_comment" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Template:HTML_comment&oldid=1169581957" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Template:HTML_comment&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FTemplate%3AHTML_comment"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FTemplate%3AHTML_comment"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-electronpdfservice-sidebar-portlet-heading" class="vector-menu mw-portlet mw-portlet-electronpdfservice-sidebar-portlet-heading" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="electron-print_pdf" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Template%3AHTML_comment&action=show-download-screen"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="javascript:print();" rel="alternate" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q121133133" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r1237875617">.mw-parser-output .documentation,.mw-parser-output .documentation-metadata{border:1px solid #a2a9b1;background-color:#ecfcf4;clear:both}.mw-parser-output .documentation{margin:1em 0 0 0;padding:1em}.mw-parser-output .documentation-metadata{margin:0.2em 0;font-style:italic;padding:0.4em 1em}.mw-parser-output .documentation-startbox{padding-bottom:3px;border-bottom:1px solid #aaa;margin-bottom:1ex}.mw-parser-output .documentation-heading{font-weight:bold;font-size:125%}.mw-parser-output .documentation-clear{clear:both}.mw-parser-output .documentation-toolbar{font-style:normal;font-size:85%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .documentation,html.skin-theme-clientpref-night .mw-parser-output .documentation-metadata{background-color:#0b1e1c}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .documentation,html.skin-theme-clientpref-os .mw-parser-output .documentation-metadata{background-color:#0b1e1c}}</style><div class="documentation-container" role="complementary" aria-labelledby="documentation-heading"> <div class="documentation"> <div class="documentation-startbox"> <span class="documentation-heading" id="documentation-heading"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/Test_Template_Info-Icon_-_Version_%282%29.svg/50px-Test_Template_Info-Icon_-_Version_%282%29.svg.png" decoding="async" width="50" height="22" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/Test_Template_Info-Icon_-_Version_%282%29.svg/75px-Test_Template_Info-Icon_-_Version_%282%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/43/Test_Template_Info-Icon_-_Version_%282%29.svg/100px-Test_Template_Info-Icon_-_Version_%282%29.svg.png 2x" data-file-width="1792" data-file-height="800" /></span></span> Template documentation</span><span class="mw-editsection-like plainlinks">[<a href="/wiki/Template:HTML_comment/doc" title="Template:HTML comment/doc">view</a>] [<a href="/wiki/Special:EditPage/Template:HTML_comment/doc" title="Special:EditPage/Template:HTML comment/doc">edit</a>] [<a href="/wiki/Special:PageHistory/Template:HTML_comment/doc" title="Special:PageHistory/Template:HTML comment/doc">history</a>] [<a href="/wiki/Special:Purge/Template:HTML_comment" title="Special:Purge/Template:HTML comment">purge</a>]</span></div> <style data-mw-deduplicate="TemplateStyles:r1238436933">.mw-parser-output .ombox{margin:4px 0;border-collapse:collapse;border:1px solid #a2a9b1;background-color:var(--background-color-neutral-subtle,#f8f9fa);box-sizing:border-box;color:var(--color-base,#202122)}.mw-parser-output .ombox.mbox-small{font-size:88%;line-height:1.25em}.mw-parser-output .ombox-speedy{border:2px solid #b32424;background-color:#fee7e6}.mw-parser-output .ombox-delete{border:2px solid #b32424}.mw-parser-output .ombox-content{border:1px solid #f28500}.mw-parser-output .ombox-style{border:1px solid #fc3}.mw-parser-output .ombox-move{border:1px solid #9932cc}.mw-parser-output .ombox-protection{border:2px solid #a2a9b1}.mw-parser-output .ombox .mbox-text{border:none;padding:0.25em 0.9em;width:100%}.mw-parser-output .ombox .mbox-image{border:none;padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .ombox .mbox-imageright{border:none;padding:2px 0.9em 2px 0;text-align:center}.mw-parser-output .ombox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ombox .mbox-invalid-type{text-align:center}@media(min-width:720px){.mw-parser-output .ombox{margin:4px 10%}.mw-parser-output .ombox.mbox-small{clear:right;float:right;margin:4px 0 4px 1em;width:238px}}body.skin--responsive .mw-parser-output table.ombox img{max-width:none!important}@media screen{html.skin-theme-clientpref-night .mw-parser-output .ombox-speedy{background-color:#310402}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .ombox-speedy{background-color:#310402}}</style><table class="box-Subst_only plainlinks ombox ombox-notice" role="presentation"><tbody><tr><td class="mbox-image"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/1/1d/Information_icon4.svg/40px-Information_icon4.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/1/1d/Information_icon4.svg/60px-Information_icon4.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/1/1d/Information_icon4.svg/80px-Information_icon4.svg.png 2x" data-file-width="620" data-file-height="620" /></span></span></td><td class="mbox-text"><b>This template should always be <a href="/wiki/Help:Substitution" title="Help:Substitution">substituted</a></b> (i.e., use <code>{{<a class="mw-selflink selflink">subst:HTML comment</a>}}</code>).</td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r1252059228">.mw-parser-output .module-shortcutboxplain{float:right;margin:0 0 0 1em;border:1px solid var(--border-color-base,#a2a9b1);background-color:var(--background-color-base,#fff);padding:0.3em 0.6em 0.2em 0.6em;text-align:center;font-size:85%}.mw-parser-output .module-shortcutboxleft{float:left;margin:0 1em 0 0}.mw-parser-output .module-shortcutlist{display:inline-block;border-bottom:1px solid var(--border-color-base,#a2a9b1);margin-bottom:0.2em}.mw-parser-output .module-shortcutboxplain ul{font-weight:bold}.mw-parser-output .module-shortcutanchordiv{position:relative;top:-3em}.mw-parser-output li .module-shortcutanchordiv{float:right}.mw-parser-output .mbox-imageright .module-shortcutboxplain{padding:0.4em 1em 0.4em 1em;line-height:1.3;margin:0}</style><div class="module-shortcutanchordiv"><span id="hcmt"></span><span id="murmur"></span></div><div class="module-shortcutboxplain noprint" role="note"><div class="module-shortcutlist"><a href="/wiki/Wikipedia:Shortcut" title="Wikipedia:Shortcut">Shortcuts</a></div><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li>{{<span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Template:Hcmt&redirect=no">hcmt</a></span>}}</li><li>{{<span class="plainlinks"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Template:Murmur&redirect=no">murmur</a></span>}}</li></ul></div></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Not to be confused with <span class="nowrap">{{</span><a href="/wiki/Template:Example_HTML_comment" title="Template:Example HTML comment">Example HTML comment</a><span class="nowrap">}}</span>.</div> <p>Use this <a href="/wiki/Wikipedia:Substitution" title="Wikipedia:Substitution">substitution</a> to insert HTML comments (<code class="mw-highlight mw-highlight-lang-html mw-content-ltr" dir="ltr"><span class="cm"></span></code>) – hidden to readers – into Wikipedia pages. </p> <div class="mw-heading mw-heading2"><h2 id="Usage">Usage</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template:HTML_comment/doc&action=edit&section=T-1" title="Edit section: Usage"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dd><code class="mw-highlight mw-highlight-lang-wikitext mw-content-ltr" dir="ltr"><span class="p">{{</span><span class="nn">subst</span><span class="p">:</span><span class="nt">html comment</span><span class="p">|</span>Lorem ipsum dolor sit amet<span class="p">}}</span></code> <dl><dd>↳ <code class="mw-highlight mw-highlight-lang-html mw-content-ltr" dir="ltr"><span class="cm"></span></code></dd></dl></dd></dl> <p>By default a space will be added before and after the given text. Use <style data-mw-deduplicate="TemplateStyles:r1247621465">.mw-parser-output span.tj-tape{padding:1px 4px;font-family:"Menlo","Consolas","Liberation Mono","Courier New",monospace;white-space:pre-wrap;word-wrap:break-word;background-color:var(--background-color-neutral-subtle,#f8f9fa);color:var(--color-emphasized,#000);border:1px solid var(--border-color-muted,#eaecf0);line-height:1.3;tab-size:4;vertical-align:baseline;border-radius:2px;margin:0}.mw-parser-output span.tj-tape span.tj-tn,.mw-parser-output span.tj-tape span.tj-tn a,.mw-parser-output span.tj-tape span.tj-tn a:link,.mw-parser-output span.tj-tape span.tj-tn a:visited,.mw-parser-output span.tj-tape span.tj-tn a:hover{font-weight:bold;color:#4169e1}.mw-parser-output span.tj-tape span.tj-an{font-weight:bold;color:#2e8b57}.mw-parser-output span.tj-tape span.tj-ac{font-style:italic;color:#933}.mw-parser-output span.tj-tape span.tj-nc{margin:0 .075em}.mw-parser-output span.tj-tape span.tj-nc+span.tj-nc,.mw-parser-output span.tj-tape span.tj-nc:first-child{margin:0 .075em 0 0}.mw-parser-output span.tj-tape span.tj-nc:last-child{margin:0 0 0 .075em}@media screen{html.skin-theme-clientpref-night .mw-parser-output div.tj-tape span.tj-tn,html.skin-theme-clientpref-night .mw-parser-output div.tj-tape span.tj-tn a,html.skin-theme-clientpref-night .mw-parser-output div.tj-tape span.tj-tn a:link,html.skin-theme-clientpref-night .mw-parser-output div.tj-tape span.tj-tn a:visited,html.skin-theme-clientpref-night .mw-parser-output div.tj-tape span.tj-tn a:hover{color:#6383E7}html.skin-theme-clientpref-night .mw-parser-output div.tj-tape span.tj-an{color:#339a60}html.skin-theme-clientpref-night .mw-parser-output div.tj-tape span.tj-ac{color:#D07373}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output div.tj-tape span.tj-tn,html.skin-theme-clientpref-os .mw-parser-output div.tj-tape span.tj-tn a,html.skin-theme-clientpref-os .mw-parser-output div.tj-tape span.tj-tn a:link,html.skin-theme-clientpref-os .mw-parser-output div.tj-tape span.tj-tn a:visited,html.skin-theme-clientpref-os .mw-parser-output div.tj-tape span.tj-tn a:hover{color:#6383E7}html.skin-theme-clientpref-os .mw-parser-output div.tj-tape span.tj-an{color:#339a60}html.skin-theme-clientpref-os .mw-parser-output div.tj-tape span.tj-ac{color:#D07373}}</style><span class="tj-tape"><span class="tj-an">collapsed</span><span class="tj-nc">=</span><span class="tj-ac">yes</span></span> to remove it (useful in vertical comments). For example, </p> <div class="mw-highlight mw-highlight-lang-wikitext mw-content-ltr" dir="ltr"><pre><span></span><span class="p">{{</span><span class="nn">subst</span><span class="p">:</span><span class="nt">html comment</span><span class="p">|</span><span class="nl">collapsed</span><span class="o">=</span>yes<span class="p">|</span> Lorem ipsum dolor sit amet <span class="p">}}</span> </pre></div> <p>will generate </p> <div class="mw-highlight mw-highlight-lang-wikitext mw-content-ltr" dir="ltr"><pre><span></span><span class="cm"></span> </pre></div> <p>In substitutable templates, use <code class="mw-highlight mw-highlight-lang-wikitext mw-content-ltr" dir="ltr"><span class="p">{{</span><span class="nn">safesubst</span><span class="p">:</span><span class="nt"><noinclude />HTML comment</span><span class="p">|</span>...<span class="p">}}</span></code>. </p> <div class="mw-heading mw-heading2"><h2 id="Notable_cases">Notable cases</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template:HTML_comment/doc&action=edit&section=T-2" title="Edit section: Notable cases"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Using this substitution allows the expansion of <a href="https://www.mediawiki.org/wiki/Help:Magic_words" class="extiw" title="mw:Help:Magic words">MediaWiki commands</a> inside HTML comments, where they would be preserved verbatim otherwise. Compare: </p> <dl><dd><code class="mw-highlight mw-highlight-lang-wikitext mw-content-ltr" dir="ltr"><span class="p">{{</span><span class="nn">subst</span><span class="p">:</span><span class="nt">html comment</span><span class="p">|{{</span><span class="nn">subst</span><span class="p">:</span><span class="nt">FULLPAGENAME</span><span class="p">}}}}</span></code> <dl><dd>↳ <code class="mw-highlight mw-highlight-lang-html mw-content-ltr" dir="ltr"><span class="cm"></span></code></dd></dl></dd></dl> <p>and: </p> <dl><dd><code class="mw-highlight mw-highlight-lang-wikitext mw-content-ltr" dir="ltr"><span class="cm"></span></code> <dl><dd>↳ <code class="mw-highlight mw-highlight-lang-html mw-content-ltr" dir="ltr"><span class="cm"></span></code></dd></dl></dd></dl> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Template:HTML_comment/doc&action=edit&section=T-3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="nowrap">{{</span><a href="/wiki/Template:Example_HTML_comment" title="Template:Example HTML comment">Example HTML comment</a><span class="nowrap">}}</span></li> <li><span class="nowrap">{{</span><a href="/wiki/Template:Comment" title="Template:Comment">Comment</a><span class="nowrap">}}</span></li></ul> <div class="documentation-clear"></div> </div> <div role="note" class="documentation-metadata plainlinks">The above <a href="/wiki/Wikipedia:Template_documentation" title="Wikipedia:Template documentation">documentation</a> is <a href="/wiki/Help:Transclusion" title="Help:Transclusion">transcluded</a> from <a href="/wiki/Template:HTML_comment/doc" title="Template:HTML comment/doc">Template:HTML comment/doc</a>. <span class="documentation-toolbar">(<a href="/wiki/Special:EditPage/Template:HTML_comment/doc" title="Special:EditPage/Template:HTML comment/doc">edit</a> | <a href="/wiki/Special:PageHistory/Template:HTML_comment/doc" title="Special:PageHistory/Template:HTML comment/doc">history</a>)</span><br />Editors can experiment in this template's sandbox <span class="documentation-toolbar">(<a class="external text" href="https://en.wikipedia.org/w/index.php?title=Template:HTML_comment/sandbox&action=edit&preload=Template%3ADocumentation%2Fpreload-sandbox">create</a> | <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Template:HTML_comment/sandbox&preload=Template%3ADocumentation%2Fmirror&action=edit&summary=Create+sandbox+version+of+%5B%5BTemplate%3AHTML+comment%5D%5D">mirror</a>)</span> and testcases <span class="documentation-toolbar">(<a class="external text" href="https://en.wikipedia.org/w/index.php?title=Template:HTML_comment/testcases&action=edit&preload=Template%3ADocumentation%2Fpreload-testcases">create</a>)</span> pages.<br />Add categories to the <a href="/wiki/Template:HTML_comment/doc" title="Template:HTML comment/doc">/doc</a> subpage. <a href="/wiki/Special:PrefixIndex/Template:HTML_comment/" title="Special:PrefixIndex/Template:HTML comment/">Subpages of this template</a>.</div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; 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