Incremental Zalgo

gistfile1.txt

// Remixed from http://eeemo.net/ and http://stackoverflow.com/questions/6579844/how-does-zalgo-text-work
// data set of leet unicode chars
//---------------------------------------------------

//those go UP
var zalgo_up = [
  '\u030d', /*     Ì     */       '\u030e', /*     ÌŽ     */      '\u0304', /*     Ì„     */      '\u0305', /*     Ì…     */
  '\u033f', /*     Ì¿     */      '\u0311', /*     Ì‘     */      '\u0306', /*     ̆     */      '\u0310', /*     Ì     */
  '\u0352', /*     ͒     */      '\u0357', /*     ͗     */      '\u0351', /*     ͑     */      '\u0307', /*     ̇     */
  '\u0308', /*     ̈     */      '\u030a', /*     ̊     */      '\u0342', /*     ͂     */      '\u0343', /*     ̓     */
  '\u0344', /*     ÌˆÌ     */     '\u034a', /*     ÍŠ     */      '\u034b', /*     Í‹     */      '\u034c', /*     ÍŒ     */
  '\u0303', /*     ̃     */      '\u0302', /*     Ì‚     */      '\u030c', /*     ÌŒ     */      '\u0350', /*     Í     */
  '\u0300', /*     Ì€     */      '\u0301', /*     Ì     */       '\u030b', /*     Ì‹     */      '\u030f', /*     Ì     */
  '\u0312', /*     ̒     */      '\u0313', /*     ̓     */      '\u0314', /*     ̔     */      '\u033d', /*     ̽     */
  '\u0309', /*     ̉     */      '\u0363', /*     ͣ     */      '\u0364', /*     ͤ     */      '\u0365', /*     ͥ     */
  '\u0366', /*     ͦ     */      '\u0367', /*     ͧ     */      '\u0368', /*     ͨ     */      '\u0369', /*     ͩ     */
  '\u036a', /*     ͪ     */      '\u036b', /*     ͫ     */      '\u036c', /*     ͬ     */      '\u036d', /*     ͭ     */
  '\u036e', /*     ͮ     */      '\u036f', /*     ͯ     */      '\u033e', /*     ̾     */      '\u035b', /*     ͛     */
  '\u0346', /*     ͆     */      '\u031a' /*     ̚     */
];

//those go DOWN
var zalgo_down = [
  '\u0316', /*     ̖     */      '\u0317', /*     ̗     */      '\u0318', /*     ̘     */      '\u0319', /*     ̙     */
  '\u031c', /*     Ìœ     */      '\u031d', /*     Ì     */       '\u031e', /*     Ìž     */      '\u031f', /*     ÌŸ     */
  '\u0320', /*     Ì      */      '\u0324', /*     ̤     */      '\u0325', /*     Ì¥     */      '\u0326', /*     ̦     */
  '\u0329', /*     ̩     */      '\u032a', /*     ̪     */      '\u032b', /*     ̫     */      '\u032c', /*     ̬     */
  '\u032d', /*     ̭     */      '\u032e', /*     ̮     */      '\u032f', /*     ̯     */      '\u0330', /*     ̰     */
  '\u0331', /*     ̱     */      '\u0332', /*     ̲     */      '\u0333', /*     ̳     */      '\u0339', /*     ̹     */
  '\u033a', /*     ̺     */      '\u033b', /*     ̻     */      '\u033c', /*     ̼     */      '\u0345', /*     ͅ     */
  '\u0347', /*     ͇     */      '\u0348', /*     ͈     */      '\u0349', /*     ͉     */      '\u034d', /*     Í     */
  '\u034e', /*     ÍŽ     */      '\u0353', /*     Í“     */      '\u0354', /*     Í”     */      '\u0355', /*     Í•     */
  '\u0356', /*     ͖     */      '\u0359', /*     ͙     */      '\u035a', /*     ͚     */      '\u0323' /*     ̣     */
];

// rand funcs
//---------------------------------------------------

//gets an int between 0 and max
function rand (max) {
  return Math.floor(Math.random() * max);
}

//gets a random char from a zalgo char table
function rand_zalgo (array) {
  var ind = Math.floor(Math.random() * array.length);
  return array[ind];
}


//lookup char to know if its a zalgo char or not
function is_zalgo_char (c) {
  var i;
  for(i=0; i<zalgo_up.length; i++)
    if(c == zalgo_up[i])
      return true;
  for(i=0; i<zalgo_down.length; i++)
    if(c == zalgo_down[i])
      return true;
  return false;
}

function incremental_zalgo (element) {
  var start = Date.now();
  var previousText = element.textContent;

  var randomIndex;

  randomIndex = rand(previousText.length - 2) + 1;

  if (is_zalgo_char(previousText[randomIndex])) return;

  var firstPart = previousText.substr(0, randomIndex);
  var lastPart = previousText.substr(randomIndex);

  var newText = '';

  var fns = [zalgo_up, zalgo_down];

  fns.forEach(function (fn) {
    var num = rand(6);
    if (Math.random() > 0.7) {
      for(var j = 0; j < num; j++) {
        newText += rand_zalgo(fn);
      }
    }
  });

  element.innerHTML = firstPart + newText + lastPart;
}

setTimeout(function () {
  var steps = 100;
  (function loop () {
    console.log('zalgo approaches');
    incremental_zalgo(document.querySelector('h1.title'));
    if (steps-- > 0) setTimeout(loop, 250 + Math.round(Math.random() * 1000));
  })();
}, 2000 + Math.random() * 3000);