Tim Berners-Lee invented the World Wide Web in 1989, the internet came 6 years earlier on January 1st in 1983 and was borne about when isolated computer networks first started communicating with each other, WWW is like a language we all speak on "the internet" that translates to our "websites".
Where domain names are concerned, IDN stands for "Internationalised Domain Name".
"In 2003, a specification was released that allows most Unicode characters to be used in domain names". unicode.org faq
The Emoji domains and IDN both work in a similar way but support varies. IDN are supported by most modern browsers and email.
You can't use a hyphen.
-.com ❌
一.com ✔️ is xn--4gq (IDN)
code for ➖ is xn--5fi (Subtraction Emoji)
➖.com ❌
It can get confusing knowing which is which, so you can't buy emoji in Dot Com.
You can buy emoji Dot Others at GoDaddy tho, Dot .WS I think is pretty cool.
If you don't want the word tumblr or blogspot add a custom domain for free, and you can think up a cool emoji handle, for website addresses. Emoji handles links work on Linkedin and Twitter, but its early days for emoji domain support compared to Internationalised Domain Names.
World Wide Web
全球資訊網 一
ワールドワイドウェブ 一
✨www一