If you're putting a user-provided string into a element, filter out the emoji along with any bold/italic/underline/etc. I don't like fake icons in my browser tabs): However, this won't work unless CSS actually gets applied, so I'll give a second option which is more reliable in elements than the Unicode variation selector (I'm looking at you GitHub. still, it's useful for situations where you're either going to be making the whole thing a hyperlink or disallowing rich markup within it. You can't override a parent element's filter in a child, so this technique can't be used to grayscale a paragraph, then re-colorize the links within it. (I use them to grayscale PNG-format "link type" icons on hyperlinks that have been modified to point to the Wayback Machine.) Unlike the variation selector, it shouldn't matter how the emoji are rendered, because CSS filters apply to everything. } You've now got emoji display on □lockdown□.
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