Well, today I learned that <!-- this --> is syntactically acceptable JavaScript
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Specifically, `<!--` has the same effect as `//` i.e. it begins a single-line comment. (`-->` has no special meaning at all.)
I can't find any reference to this in the specification, but seemingly every JavaScript engine accepts it, for obvious historical reasons
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It's so you could do <script type="text/javascript"><!-- console.log('hi'); //--></script> and avoid interpreting JS as HTML
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I always did <script type="text/javascript">//<!-- like some idiot
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Back in my day this was best practice ~grumble grumble~
Thanks. Twitter will use this to make your timeline better. UndoUndo
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It's in Annex B, like much other historical stuff: https://tc39.github.io/ecma262/#sec-html-like-comments …
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And in fact B.1.3 gives meaning to --> as well: preceded by a newline, it also starts a single line comment. So --> foo is valid JS.
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