javascript - Converting Base64 to uint8Array in pdfmake makes tamilstrings to shuffle -

i have created example using pdf make in have used tamil language displaying contents in pdf when run code tamil strings shuffled.i have used custom tamil fonts it.why strings getting shuffled when created.can tell wrong in conversion of base64 strings uint8array?

function base64touint8array (base64) {   $log.log('base64 is', base64);   var raw = atob(base64);   var uint8array = new uint8array(raw.length);   (var = 0; < raw.length; i++) {     uint8array[i] = raw.charcodeat(i);   }   $log.log('uint8array is', uint8array);   return uint8array; }