Map a string to upper- or lower-case locale-sensitively.
Many people don't realize that case mapping is a locale-sensitive operation. The fact is, what the upper-case version of a particular letter is depends on who you ask!
npm install ilib-casemapper
or
yarn add ilib-casemapper
To map the case of a letter, you first create an instance of the CaseMapper class. By default, this will use the mappings for English.
Here is how you would map a letter using the Turkish rules:
ES2015:
var CaseMapper = require("ilib-casemapper");
var cm = new CaseMapper({locale: "tr-TR"});
var upper = cm.map('i'); // "upper" should now contain "İ"
ES6:
import CaseMapper from "ilib-casemapper";
const cm = new CaseMapper({locale: "tr-TR"});
const upper = cm.map('i'); // "upper" should now contain "İ"
In general, you should be able to use the case mapper in older Javascript engines by requiring it, or in modern Javascript engines by importing it. The package was built to be able to support both. From here on, we will only give modern JS examples.
Here is how you use the case mapper to lower:
import CaseMapper from "ilib-casemapper";
const cm = new CaseMapper({
locale: "tr-TR",
direction: "lower"
});
const upper = cm.map('İ'); // "upper" should now contain "i"
Full documentation: CaseMapper class
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- Code taken from ilib 14.19.0 and converted to an ES6 module.
- Use babel to transpile it back to ES2015 so it can be used in either ES215 or ES6 code