W3cubDocs

/DOM

document.createComment

createComment() creates a new comment node, and returns it.

Syntax

CommentNode = document.createComment(data) 

Parameters

data
A string containing the data to be added to the Comment.

Example

var docu = new DOMParser().parseFromString('<xml></xml>',  "application/xml");
var comment = docu.createComment('This is a not-so-secret comment in your document');

docu.getElementsByTagName('xml')[0].appendChild(comment);

alert(new XMLSerializer().serializeToString(docu));
// Displays: <xml><!--This is a not-so-secret comment in your document--></xml>

Specification

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support Yes ? Yes Yes ? 7
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support Yes Yes ? Yes ? ? ?

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/document/createComment