| /** Used to compose unicode character classes. */ |
| var rsAstralRange = '\\ud800-\\udfff', |
| rsComboMarksRange = '\\u0300-\\u036f', |
| reComboHalfMarksRange = '\\ufe20-\\ufe2f', |
| rsComboSymbolsRange = '\\u20d0-\\u20ff', |
| rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange, |
| rsVarRange = '\\ufe0e\\ufe0f'; |
| |
| /** Used to compose unicode capture groups. */ |
| var rsZWJ = '\\u200d'; |
| |
| /** 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/). */ |
| var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']'); |
| |
| /** |
| * Checks if `string` contains Unicode symbols. |
| * |
| * @private |
| * @param {string} string The string to inspect. |
| * @returns {boolean} Returns `true` if a symbol is found, else `false`. |
| */ |
| function hasUnicode(string) { |
| return reHasUnicode.test(string); |
| } |
| |
| module.exports = hasUnicode; |