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21 lines
599 B
JavaScript
21 lines
599 B
JavaScript
6 years ago
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'use strict';
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var irregularPlurals = require('irregular-plurals');
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module.exports = function (str, plural, count) {
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if (typeof plural === 'number') {
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count = plural;
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}
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if (str in irregularPlurals) {
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plural = irregularPlurals[str];
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} else if (typeof plural !== 'string') {
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plural = (str.replace(/(?:s|x|z|ch|sh)$/i, '$&e').replace(/([^aeiou])y$/i, '$1ie') + 's')
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.replace(/i?e?s$/i, function (m) {
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var isTailLowerCase = str.slice(-1) === str.slice(-1).toLowerCase();
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return isTailLowerCase ? m.toLowerCase() : m.toUpperCase();
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});
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}
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return count === 1 ? str : plural;
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};
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