zoellner

const fs = require('fs');

// our demo string is in 'default' utf8 with emoji character assuming you are using an editor that supports those.
// if not, you can test this gist by setting utf8string to the equivalent '->\ud83d\ude03\ud83e\uddd2\ud83c\udffc\u00fc\u010d\u0113<-'
// gist doesn't support all ZWJ sequences, so can't show this here but it works with those as well, e.g. '\ud83d\udc68\ud83c\udffc\u200d\ud83d\udcbb'
const utf8string = '->😃🧒🏼üčē<-';

// this is what you'd usually do to write to a utf-8 encoded file
fs.writeFileSync('test-utf8.txt', utf8string);