Text Escaping and Unescaping in JavaScript(Unicode の文字列をエスケープする JavaScript)
Notes No data is sent to the server (i.e. everything is done in JavaScript). Conversion from Unicode to other encodings such as Shift_JIS can be slow first time as it needs to initialize internal conversion tables. Surrogate pairs in UTF-16 are supported. Try inserting \uD840\uDC0B in the second form. Three-byte characters in EUC-JP are not supported. Links JavaScript Unicode Charts Try GNU Libidn
JavaScript, Regex, and Unicode
Not all shorthand character classes and other JavaScript regex syntax is Unicode-aware. In some cases it can be important to know exactly what certain tokens match, and that's what this post will explore. According to ECMA-262 3rd Edition, \s, \S, ., ^, and $ use Unicode-based interpretations of whitespace and newline, while \d, \D, \w, \W, \b, and \B use ASCII-only interpretations of digit, word
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