This character is a Other Letter and is mainly used in the Old Italic script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. The word that U+10308 forms with similar adjacent characters prevents a line break inside it.
El Wikipedia tiene la siguiente información acerca de este punto de código:
The Old Italic scripts are a family of ancient writing systems used in the Italian Peninsula between about 700 and 100 BC, for various languages spoken in that time and place. The most notable member is the Etruscan alphabet, which was the immediate ancestor of the Latin alphabet used by more than 100 languages today, including English. The runic alphabets used in Northern Europe are believed to have been separately derived from one of these alphabets by the 2nd century AD.
Representaciones
Sistema
Representación (click value to copy)
N.º
66312
UTF-8
F0 90 8C 88
UTF-16
D8 00 DF 08
UTF-32
00 01 03 08
URL-Quoted
%F0%90%8C%88
HTML hex reference
𐌈
Mojibake mal de windows-1252
ðŒˆ
Codificación: GB18030 (hexadecimales bytes)
90 30 CE 36
RFC 5137
\u'10308'
Bash and Zsh inside echo -e
\U00010308
C and C++
\U00010308
C#
\U00010308
CSS
\010308
Excel
=UNICHAR(66312)
Go
\U00010308
JavaScript
\uD800\uDF08
Modern JavaScript since ES6
\u{10308}
JSON
\uD800\uDF08
Java
\uD800\uDF08
Lua
\u{10308}
Matlab
char(66312)
Perl
"\x{10308}"
PHP
\u{10308}
PostgreSQL
U&'\+010308'
PowerShell
`u{10308}
Python
\U00010308
Ruby
\u{10308}
Rust
\u{10308}
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