An advantage of this approach is that it lets us utilize any CSS animation library that works off of the same concept of adding and removing classes. Some of the more popular libraries that work this way are animate.css and magic.css. Chris Coyier has an amazing article on CSS Tricks that lists more of these if you are interested. - Source: dev.to / over 2 years ago

Along with alphanumeric characters, African click sounds, mathematical and geometric symbols, dingbats, and computer control sequences, emojis can be represented as Unicode characters, making them computer-readable. Unlike alphanumeric characters and other symbols, however, emojis are maintained by the Unicode Consortium. The consortium solicits proposals for new emojis, and regularly selects which emojis will be... - Source: dev.to / 5 months ago

ASCII isn't the only encoding method. You're looking at unicode characters, which can be expressed as numbers just like ASCII characters based on the encoding system . More to your point, if you were already in the mozilla documentation, why didn't you just read their explanation of how it's handled? Source: almost 1 year ago

They are simply unicode characters. Https://home.unicode.org/ Try it in VS Code. Yes, an Emoji is valid in JS. Different browsers render the emojis differently though. Source: about 1 year ago

When you refer to something as an “Emoji” you indicate that they’re apart of the Unicode language. What Reddit is doing is not considered apart of unicode therefore not technically an “Emoji”, instead it’s just a plain old image used in text format. Source: over 1 year ago

For almost any character that needs to be added to computers globally, you go to bug Unicode and they may add it to a new version of the UTF standard. From there people who make relevant software will gradually adopt it. Source: over 1 year ago