Abbreviate a localized number in JavaScript for thousands (1k) and millions (1m)

Question

I am using the following Javascript to display my Instagram follower count on my site.

Answer 1

function intlFormat(num)
{
  return new Intl.NumberFormat().format(Math.round(num*10)/10);
}
function makeFriendly(num)
{
  if(num >= 1000000)
    return intlFormat(num/1000000)+'M';
  if(num >= 1000)
    return intlFormat(num/1000)+'k';
  return intlFormat(num);
}

Yields:

makeFriendly(1234567)
"1.2M"
makeFriendly(123457)
"123.5k"
makeFriendly(1237)
"1.2k"
makeFriendly(127)
"127"

Intl is the Javascript standard 'package' for implemented internationalized behaviours. Intl.NumberFormatter is specifically the localized number formatter. So this code actually respects your locally configured thousands and decimal separators.