Marc Mintel
5397309103
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22 lines
510 B
Plaintext
22 lines
510 B
Plaintext
/**
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* This follows https://tc39.es/ecma402/#sec-case-sensitivity-and-case-mapping
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* @param str string to convert
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*/
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function toUpperCase(str) {
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return str.replace(/([a-z])/g, (_, c) => c.toUpperCase());
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}
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const NOT_A_Z_REGEX = /[^A-Z]/;
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/**
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* https://tc39.es/ecma402/#sec-iswellformedcurrencycode
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*/
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export function IsWellFormedCurrencyCode(currency) {
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currency = toUpperCase(currency);
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if (currency.length !== 3) {
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return false;
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}
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if (NOT_A_Z_REGEX.test(currency)) {
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return false;
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}
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return true;
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}
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