Instead of
<!--
,
I used
<!-
…and it is working.
How?
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Modern browser parsers (i.e. those that use the HTML5 parsing algorithm) work like this. If they are expecting text or a new tag next, and they see
<!then they check the next few characters to see if they are--orDOCTYPEor, if they are processing embedded SVG or MathML,[CDATA[. (See http://dev.w3.org/html5/spec/tokenization.html#markup-declaration-open-state)If, as in the case of
<!- foo, none of these match then the parser enters the bogus comment state where all the characters following, up to the next>, are read and and converted into a comment to be put into the DOM.Hence the behaviour you see with
<!-working like a comment start. Note that such behaviour is “repair” behaviour for broken markup and it’s wise not to rely on it.You can see how such markup forms a DOM here: Live DOM Viewer
Also note that this is different to what @Amber says. It is not treated as a tag in any meaningful sense, and it is certainly not ignored.