1 | var deburrLetter = require('./_deburrLetter'),
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2 | toString = require('./toString');
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3 |
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4 | /** Used to match Latin Unicode letters (excluding mathematical operators). */
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5 | var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
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6 |
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7 | /** Used to compose unicode character classes. */
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8 | var rsComboMarksRange = '\\u0300-\\u036f',
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9 | reComboHalfMarksRange = '\\ufe20-\\ufe2f',
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10 | rsComboSymbolsRange = '\\u20d0-\\u20ff',
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11 | rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange;
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12 |
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13 | /** Used to compose unicode capture groups. */
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14 | var rsCombo = '[' + rsComboRange + ']';
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15 |
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16 | /**
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17 | * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
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18 | * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
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19 | */
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20 | var reComboMark = RegExp(rsCombo, 'g');
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21 |
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22 | /**
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23 | * Deburrs `string` by converting
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24 | * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
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25 | * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
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26 | * letters to basic Latin letters and removing
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27 | * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
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28 | *
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29 | * @static
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30 | * @memberOf _
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31 | * @since 3.0.0
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32 | * @category String
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33 | * @param {string} [string=''] The string to deburr.
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34 | * @returns {string} Returns the deburred string.
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35 | * @example
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36 | *
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37 | * _.deburr('déjà vu');
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38 | * // => 'deja vu'
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39 | */
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40 | function deburr(string) {
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41 | string = toString(string);
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42 | return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
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43 | }
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44 |
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45 | module.exports = deburr;
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