For making vaporwave UTF8 text.

CoolType.js

// Fonts: Either a string containing s single letter "A" from the utf code space you want to use or a number for one of these code spaces:
// 0 𝐀𝐁𝐂𝐃𝐄𝐅𝐆𝐇𝐈𝐉𝐊𝐋𝐌𝐍𝐎𝐏𝐐𝐑𝐒𝐓𝐔𝐕𝐗𝐘𝐙
// 1 𝐴𝐵𝐶𝐷𝐸𝐹𝐺𝐻𝐼𝐽𝐾𝐿𝑀𝑁𝑂𝑃𝑄𝑅𝑆𝑇𝑈𝑉𝑋𝑌𝑍
// 2 𝑨𝑩𝑪𝑫𝑬𝑭𝑮𝑯𝑰𝑱𝑲𝑳𝑴𝑵𝑶𝑷𝑸𝑹𝑺𝑻𝑼𝑽𝑿𝒀𝒁
// 3 𝓐𝓑𝓒𝓓𝓔𝓕𝓖𝓗𝓘𝓙𝓚𝓛𝓜𝓝𝓞𝓟𝓠𝓡𝓢𝓣𝓤𝓥𝓧𝓨𝓩
// 4 𝕬𝕭𝕮𝕯𝕰𝕱𝕲𝕳𝕴𝕵𝕶𝕷𝕸𝕹𝕺𝕻𝕼𝕽𝕾𝕿𝖀𝖁𝖃𝖄𝖅
// 5 𝖠𝖡𝖢𝖣𝖤𝖥𝖦𝖧𝖨𝖩𝖪𝖫𝖬𝖭𝖮𝖯𝖰𝖱𝖲𝖳𝖴𝖵𝖷𝖸𝖹
// 6 𝗔𝗕𝗖𝗗𝗘𝗙𝗚𝗛𝗜𝗝𝗞𝗟𝗠𝗡𝗢𝗣𝗤𝗥𝗦𝗧𝗨𝗩𝗫𝗬𝗭
// 7 𝘈𝘉𝘊𝘋𝘌𝘍𝘎𝘏𝘐𝘑𝘒𝘓𝘔𝘕𝘖𝘗𝘘𝘙𝘚𝘛𝘜𝘝𝘟𝘠𝘡
// 8 𝘼𝘽𝘾𝘿𝙀𝙁𝙂𝙃𝙄𝙅𝙆𝙇𝙈𝙉𝙊𝙋𝙌𝙍𝙎𝙏𝙐𝙑𝙓𝙔𝙕
// 9 𝙰𝙱𝙲𝙳𝙴𝙵𝙶𝙷𝙸𝙹𝙺𝙻𝙼𝙽𝙾𝙿𝚀𝚁𝚂𝚃𝚄𝚅𝚇𝚈𝚉
// 10 ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｘｙｚ
function coolType(font, string){
  if(typeof font === "number"){
    font = "𝐀 𝐴 𝑨 𝓐 𝕬 𝖠 𝗔 𝘈 𝘼 𝙰 ａ".split(" ")[font];
  }
  string = string.toUpperCase();
  var cp = font.codePointAt(0);
  var a = 65;
  var s = "";
  string.split("").forEach(function(c){
    var cc = c.charCodeAt(0);
    if(cc < 65 || cc > 65+26) s += c;
    else s += String.fromCodePoint(cp + (c.charCodeAt(0) - a));
  });
  return s;
}