Cᴏɴᴠᴇʀᴛ ʟᴏᴡᴇʀ ᴄᴀsᴇ ʟᴇᴛᴛᴇʀs ɪɴ ᴀ sᴛʀɪɴɢ ᴛᴏ sᴍᴀʟʟ ᴄᴀᴘs. Fᴀᴄᴇʙᴏᴏᴋ sᴜᴘᴘᴏʀᴛs sᴍᴀʟʟ ᴄᴀᴘs.

toSmallCaps.js

window.toSmallCaps = (function () {
  var letters = "abcdefghijklmnopqrstuvwxyz";
  var caps = "ᴀʙᴄᴅᴇғɢʜɪᴊᴋʟᴍɴᴏᴘǫʀsᴛᴜᴠᴡxʏᴢ";

  return function replace(value) {
    var newValue = '';

    for (i = 0; i < value.length; i++) {
      var letter = value[i];
      var index = letters.indexOf(letter);

      newValue += index !== -1 ? caps.charAt(index) : letter;
    }

    return newValue;
  };
}());