#utf8 detector
Detect if a Buffer is utf8 encoded. It need The minimum amount of bytes is 4.
varfs=require('fs');varisUtf8=require('is-utf8');varansi=fs.readFileSync('ansi.txt');varutf8=fs.readFileSync('utf8.txt');console.log('ansi.txt is utf8: '+isUtf8(ansi));//falseconsole.log('utf8.txt is utf8: '+isUtf8(utf8));//true