if (padded) { output += '=='; }
} else if (remainder === 2) {
const b = buffer[i + 1];
output += dictionary[a >>> 2];
output += dictionary[(a << 4 | b >>> 4) & 0b111111];
output += dictionary[(b << 2) & 0b111111];
if (padded) { output += '='; }
}
return output;