react-native-blob-util/utils/unicode.js

A module provides upload, download, and files access API. Supports file stream read/write for process large files.

export default function(x) {
  var r = /\\u([\d\w]{4})/gi;
  x = x.replace(r, function (match, grp) {
    return String.fromCharCode(parseInt(grp, 16));
  });
  return unescape(x);
}