Javascript Unicode Regex - Range Out Of Order In Character Class

Why does the following code give a 'Range out of order in character class' error? var min_wordsafe_length = 1; var max_length = 20; var string = 'some-slug-like-string-with-!@£!%-

Solution 1:

JavaScript uses the syntax \uhhhh (exactly 4 hexadecimal digits) to specify an UTF-16 code unit in the regular expression. For characters in BMP range, except for the range D800-DFFF, the code point of the character maps directly to one UTF-16 code unit which has the same value of the code point. This is exactly the case here, so we don't need to deal with surrogate and its quirks.

In this case, just replace \x{h...hh} syntax from PCRE (in PHP) with \uhhhh syntax:

varPREG_CLASS_UNICODE_WORD_BOUNDARY= [
    "\\u0000-\\u002F\\u003A-\\u0040\\u005B-\\u0060\\u007B-\\u00A9\\u00AB-\\u00B1\\u00B4",
    "\\u00B6-\\u00B8\\u00BB\\u00BF\\u00D7\\u00F7\\u02C2-\\u02C5\\u02D2-\\u02DF",
    "\\u02E5-\\u02EB\\u02ED\\u02EF-\\u02FF\\u0375\\u037E-\\u0385\\u0387\\u03F6",
    "\\u0482\\u055A-\\u055F\\u0589-\\u058A\\u05BE\\u05C0\\u05C3\\u05C6",
    "\\u05F3-\\u060F\\u061B-\\u061F\\u066A-\\u066D\\u06D4\\u06DD\\u06E9",
    "\\u06FD-\\u06FE\\u0700-\\u070F\\u07F6-\\u07F9\\u0830-\\u083E",
    "\\u0964-\\u0965\\u0970\\u09F2-\\u09F3\\u09FA-\\u09FB\\u0AF1\\u0B70",
    "\\u0BF3-\\u0BFA\\u0C7F\\u0CF1-\\u0CF2\\u0D79\\u0DF4\\u0E3F\\u0E4F",
    "\\u0E5A-\\u0E5B\\u0F01-\\u0F17\\u0F1A-\\u0F1F\\u0F34\\u0F36\\u0F38",
    "\\u0F3A-\\u0F3D\\u0F85\\u0FBE-\\u0FC5\\u0FC7-\\u0FD8\\u104A-\\u104F",
    "\\u109E-\\u109F\\u10FB\\u1360-\\u1368\\u1390-\\u1399\\u1400",
    "\\u166D-\\u166E\\u1680\\u169B-\\u169C\\u16EB-\\u16ED",
    "\\u1735-\\u1736\\u17B4-\\u17B5\\u17D4-\\u17D6\\u17D8-\\u17DB",
    "\\u1800-\\u180A\\u180E\\u1940-\\u1945\\u19DE-\\u19FF",
    "\\u1A1E-\\u1A1F\\u1AA0-\\u1AA6\\u1AA8-\\u1AAD\\u1B5A-\\u1B6A",
    "\\u1B74-\\u1B7C\\u1C3B-\\u1C3F\\u1C7E-\\u1C7F\\u1CD3\\u1FBD",
    "\\u1FBF-\\u1FC1\\u1FCD-\\u1FCF\\u1FDD-\\u1FDF\\u1FED-\\u1FEF",
    "\\u1FFD-\\u206F\\u207A-\\u207E\\u208A-\\u208E\\u20A0-\\u20B8",
    "\\u2100-\\u2101\\u2103-\\u2106\\u2108-\\u2109\\u2114",
    "\\u2116-\\u2118\\u211E-\\u2123\\u2125\\u2127\\u2129\\u212E",
    "\\u213A-\\u213B\\u2140-\\u2144\\u214A-\\u214D\\u214F",
    "\\u2190-\\u244A\\u249C-\\u24E9\\u2500-\\u2775\\u2794-\\u2B59",
    "\\u2CE5-\\u2CEA\\u2CF9-\\u2CFC\\u2CFE-\\u2CFF\\u2E00-\\u2E2E",
    "\\u2E30-\\u3004\\u3008-\\u3020\\u3030\\u3036-\\u3037",
    "\\u303D-\\u303F\\u309B-\\u309C\\u30A0\\u30FB\\u3190-\\u3191",
    "\\u3196-\\u319F\\u31C0-\\u31E3\\u3200-\\u321E\\u322A-\\u3250",
    "\\u3260-\\u327F\\u328A-\\u32B0\\u32C0-\\u33FF\\u4DC0-\\u4DFF",
    "\\uA490-\\uA4C6\\uA4FE-\\uA4FF\\uA60D-\\uA60F\\uA673\\uA67E",
    "\\uA6F2-\\uA716\\uA720-\\uA721\\uA789-\\uA78A\\uA828-\\uA82B",
    "\\uA836-\\uA839\\uA874-\\uA877\\uA8CE-\\uA8CF\\uA8F8-\\uA8FA",
    "\\uA92E-\\uA92F\\uA95F\\uA9C1-\\uA9CD\\uA9DE-\\uA9DF",
    "\\uAA5C-\\uAA5F\\uAA77-\\uAA79\\uAADE-\\uAADF\\uABEB",
    "\\uE000-\\uF8FF\\uFB29\\uFD3E-\\uFD3F\\uFDFC-\\uFDFD",
    "\\uFE10-\\uFE19\\uFE30-\\uFE6B\\uFEFF-\\uFF0F\\uFF1A-\\uFF20",
    "\\uFF3B-\\uFF40\\uFF5B-\\uFF65\\uFFE0-\\uFFFD"].join('');