decodeURIComponent(escape('Bj\u00c3\u00b6rn H\u00c3\u00bcttner'))
Функция escape имеет статус deprecated
stackoverflow.com/questions/13356493/decode-utf-8-...
Или так
/**
* Decodes utf-8 encoded string back into multi-byte Unicode characters.
*
* Can be achieved JavaScript by decodeURIComponent(escape(str)),
* but this approach may be useful in other languages.
*
* @param {string} utf8String - UTF-8 string to be decoded back to Unicode.
* @returns {string} Decoded Unicode string.
*/
function utf8Decode(utf8String) {
if (typeof utf8String != 'string') throw new TypeError('parameter ‘utf8String’ is not a string');
// note: decode 3-byte chars first as decoded 2-byte strings could appear to be 3-byte char!
const unicodeString = utf8String.replace(
/[\u00e0-\u00ef][\u0080-\u00bf][\u0080-\u00bf]/g, // 3-byte chars
function(c) { // (note parentheses for precedence)
var cc = ((c.charCodeAt(0)&0x0f)<<12) | ((c.charCodeAt(1)&0x3f)<<6) | ( c.charCodeAt(2)&0x3f);
return String.fromCharCode(cc); }
).replace(
/[\u00c0-\u00df][\u0080-\u00bf]/g, // 2-byte chars
function(c) { // (note parentheses for precedence)
var cc = (c.charCodeAt(0)&0x1f)<<6 | c.charCodeAt(1)&0x3f;
return String.fromCharCode(cc); }
);
return unicodeString;
}
https://gist.github.com/chrisveness/bcb00eb717e638...
