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27 lines
949 B
JavaScript
27 lines
949 B
JavaScript
6 years ago
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/** Used to compose unicode character classes. */
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var rsAstralRange = '\\ud800-\\udfff',
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rsComboMarksRange = '\\u0300-\\u036f',
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reComboHalfMarksRange = '\\ufe20-\\ufe2f',
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rsComboSymbolsRange = '\\u20d0-\\u20ff',
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rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
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rsVarRange = '\\ufe0e\\ufe0f';
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/** Used to compose unicode capture groups. */
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var rsZWJ = '\\u200d';
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/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
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var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
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/**
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* Checks if `string` contains Unicode symbols.
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*
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* @private
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* @param {string} string The string to inspect.
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* @returns {boolean} Returns `true` if a symbol is found, else `false`.
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*/
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function hasUnicode(string) {
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return reHasUnicode.test(string);
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}
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module.exports = hasUnicode;
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