1 /** Used to compose unicode character classes. */
2 var rsAstralRange = '\\ud800-\\udfff',
3 rsComboMarksRange = '\\u0300-\\u036f',
4 reComboHalfMarksRange = '\\ufe20-\\ufe2f',
5 rsComboSymbolsRange = '\\u20d0-\\u20ff',
6 rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
7 rsVarRange = '\\ufe0e\\ufe0f';
9 /** Used to compose unicode capture groups. */
10 var rsZWJ = '\\u200d';
12 /** 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/). */
13 var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
16 * Checks if `string` contains Unicode symbols.
19 * @param {string} string The string to inspect.
20 * @returns {boolean} Returns `true` if a symbol is found, else `false`.
22 function hasUnicode(string) {
23 return reHasUnicode.test(string);
26 module.exports = hasUnicode;