57 lines
1.0 KiB
JavaScript
57 lines
1.0 KiB
JavaScript
'use strict';
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function preserveCamelCase(str) {
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var isLastCharLower = false;
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for (var i = 0; i < str.length; i++) {
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var c = str.charAt(i);
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if (isLastCharLower && (/[a-zA-Z]/).test(c) && c.toUpperCase() === c) {
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str = str.substr(0, i) + '-' + str.substr(i);
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isLastCharLower = false;
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i++;
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} else {
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isLastCharLower = (c.toLowerCase() === c);
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}
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}
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return str;
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}
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module.exports = function () {
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var str = [].map.call(arguments, function (str) {
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return str.trim();
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}).filter(function (str) {
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return str.length;
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}).join('-');
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if (!str.length) {
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return '';
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}
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if (str.length === 1) {
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return str.toLowerCase();
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}
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if (!(/[_.\- ]+/).test(str)) {
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if (str === str.toUpperCase()) {
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return str.toLowerCase();
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}
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if (str[0] !== str[0].toLowerCase()) {
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return str[0].toLowerCase() + str.slice(1);
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}
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return str;
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}
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str = preserveCamelCase(str);
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return str
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.replace(/^[_.\- ]+/, '')
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.toLowerCase()
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.replace(/[_.\- ]+(\w|$)/g, function (m, p1) {
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return p1.toUpperCase();
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});
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};
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