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ECMAScript spec abstract operations.

There is a newer version: 1.22.3

import fs from 'fs';
import path from 'path';

import C from '@unicode/unicode-15.0.0/Case_Folding/C/symbols.js';
import S from '@unicode/unicode-15.0.0/Case_Folding/S/symbols.js';

function normalize(map) {
	return Object.fromEntries(Array.from(map, ([o, i]) => [i, [].concat(o)[0]]));
}

const cases = {
	C: normalize(C),
	S: normalize(S),
};

fs.writeFileSync(
	path.join(process.cwd(), './helpers/caseFolding.json'),
	JSON.stringify(cases, null, '\t'),
);