Elegant i18n for React in TypeScript
hermes-react is a TypeScript library for React dedicated to i18n - especially elegant decorated typography, for example romanization of non-latin writing systems - inspired by my general-purpose hermes library.
The package on NPM is:
@giancosta86/hermes-react
The public API entirely resides in the root package index, so you shouldn't reference specific modules.
The library comes with a ready-made CSS stylesheet - providing typographic enhancements such as pinyin tone colors - which you can optionally reference in your projects.
In particular, if you are using Next.js, you just need to add one line to the import block of your _app.tsx
file:
import "@giancosta86/hermes-react/dist/index.css";
Once referenced the CSS stylesheet, if you start decorating characters with the provided metadata - such as the ones in the Pinyin
namespace - you'll see them rendered in color by the <DecoratedText/>
component.
<DecoratedText/>
is a component with the following properties:
-
text
- the text to be formatted -
metadataByChar
- mapping each decorated character to its typographic metadata
where metadataByChar
is just an object whose entries have:
-
for key, a single character that should be decorated
-
for value, the related
CharMetadata
object containing at least one of:-
the
annotation string
- to be printed on top of the character -
optionally, a
class name
string used to style the whole character box
-
The component formats the given text
according to the following algorithm:
-
The text is trimmed
-
Any
\r\n
is converted to\n
-
Every additional
\n
at the end of a\n\n
sequence is ignored -
The text is split into paragraphs -
<p>
blocks - separated by\n\n
sequences that are used as separators and then ignored -
Within every paragraph:
-
\n
is mapped to<br/>
-
for every other character:
-
if the character has metadata in the
metadataByChar
map:-
the related annotation string is printed on top of the character
-
the whole structure is packed into a
<ruby>
tag, styled with the (optional) requested classes
-
-
otherwise, the character is printed verbatim, with no additional HTML tags
-
-
When annotating a pinyin logogram, you can associate to its className
metadata one of the following values (actually, strings) of the Pinyin
namespace:
-
flat
-
rising
-
fallingRising
-
falling
-
neuter
If you need more granular control, you can reference the constants declared in the PinyinTone
namespace - having the same names but providing just the tone class name.
If you import the stylesheet provided by the library, the component will render the characters in color.
The Glyph
namespace provides general-purpose class names - such as latin
, nonLatin
, phonogram
, logogram
, ..., which you can use to style your decorated characters.
Via the Russian.metadataByChar
object, you can add romanization to any Russian text - as well as a default set of fine-grained, stylable CSS classes:
import { DecoratedText, Russian } from "@giancosta86/hermes-react";
<DecoratedText
text="АаБбВвГгДдЕеЁёЖжЗзИиЙйКкЛлМмНнОоПпРрСсТтУуФфХхЦцЧчШшЩщЪъЫыЬьЭэЮюЯя"
metadataByChar={Russian.metadataByChar}
/>;
Of course, should you need just the CSS classes instead of the romanization, you can simply create a custom copy of Russian.metadataByChar
without the annotation
field.