Zalgofy is an ES compatible library that renders text in with the classic "zalgo" pattern. Basically it will transform text that looks like this:

Random text 1234

into something that looks like this:

̴̘̼̿R̳ͯ͂͢ȁ̙́ń̵̪̇d̦̟͛͟ó̷͕m ̰̲͑̽t̷̲̀͆ė͓͊͘x̶̬ͣ̚t ͓ͦͥ͝1̻̯̄͞2͍̗̎3̜͎͑͞4

In your node project open a terminal within the project directory and type:

npm install zalgofy

Then in your project you can import it like:

import zalgofy from 'zalgofy';

...

console.log(zalgofy('Random Text 1234'));

which should output

̴̄̕ͅȒ̶̖͘a̲ͬͬ̕ṉ̻́d̴ͤ̃͘o̰̗͂̈m ̶͉̤̋țͮ͠ͅe̸̞͌̈x͖͊ͯ͞t ̭́ͩͭ1͈͌́̇2̝͉ͭ̕3̶ͥ̂ͅ4

Each time you run zalgofy() the diacritical marks will look a bit different, they are randomly applied. You can pass a configuration object into zalgofy() to have more control over the number of diacritics applied to the letters.

let config = {
    maxAccentsUp: 3,
    maxAccentsDown: 3,
    maxAccentsMiddle: 2,
    maxTotalAccents: 3
};

Diacritical marks will either be above the letter, in the middle, or below the letter. On each letter the algorithm will try to place maxTotalAccents number of diacritical marks. The number of marks from the upper group will not exceed maxAccentsUp, similarly for middle and lower groups.

To start getting crazy you wanna do something like this:

let config = {
    maxAccentsUp: 100,
    maxAccentsDown: 100,
    maxAccentsMiddle: 100,
    maxTotalAccents: 100
};

console.log(zalgofy('random text 1234', config));

̸̸̵̸̸̡̢̡̨̧̛̛̛͇͓̠̰̞̤̺͚̺͈̦͎͚͍͈̳̘͔̩̯̺̰̙͖̝͖͈̥̳̹̻̩̘̲̤̭ͨ͑ͬ̇̅̐ͯ̋ͩ̇̉̑̍ͫͧ̌̂ͭ̇̉́̾̌ͫ͑ͧ̿ͤ͋ͨ̋͆̿̍͊̉̍̈́̌ͣ͌͂́ͦ͘̕͢͜͠͝ͅŖ̡̧̨̛̛̛͖̫͈͖̦̰͍̫̺̦̜͕̟̺̘̝͖̼̜̺͈̼̙̤̺͚̰̜̺̳̻͎͇͍̹͚̞͓͈̜͍̐ͦ̈̍ͪ̋̅͌ͣ͋ͦͤ͌̄ͩͤ̋̉̊ͣ͊̽ͪ́ͦ̀̇ͬͮ̃͑̽̾̓̀͛̾̽͌ͫ̕͘͟͜͡͡͡͠͞͞ͅa̵̷̸̶̴̴̶̡̨̢̛̛͓͔͚̦̺͖̝͓͙̫̞̫̤͉͔̠͙̮͇̥̹͈̫̟̟͕͕͙̩̻̺̹̰̲̩̰͉̫̙̟̤͔̮̞̥̐̈́ͯ̃͐͋̐ͫ̌͂̆ͫͯ̅͋̊̌ͬͣ̇̊́̽͛͒̄ͪ̄̈́͛ͫ̀ͩ̊̀́̿̄̕͘͞͡ņ̵̵̴̷̸̵̷̷̴̵̴̶̯̰̙̹͎͖̠̯͉̞̮̬͓̳̪̻̞̹̲̤̪̲͇̭̤̳̫͓̹̙͍̞͚̖̬̼͍̤̀ͭͤ̇̉͌͂̎ͫͧͥ͒̅ͮ͐́͑̄̌̍̂̈́ͭ̄ͥ̑̆̾̂̑ͫ̉̍̃ͪ̈ͨ̐̄ͣ̂͌̕̚͢͟͜͝͝d̴̵̸̡̢̨̨̢͎͙̘͚͓̱͍͙͇̜̻̤̺̟̻̝͖͔̻̻͚̬̼͈̮̰͙̤͔̳̞͈̳̩̱̮̻̍̈́ͩͬͨ̏̓͗ͨ̾ͥͪ̓̍̆͛ͩͬ̈͐̌̄̾̿͆̿̏͆̀̋́́̊̾͂̊ͧͪ̋̅̀͋ͧ̚͜͟͝͞͠͝͝͝ͅͅơ̸̷̡̧̨̡̢̡̡̛̛̼̹̪̙͎̳͔̱̞̤͔̟͉̝͉̲͎̹̲̲̺͖͉̪̪̹̲̰̠̗̻̪̞͓̝͂̐̾͋͌̃̏̃̓ͭ̈́́͛́ͮ͌̈̎ͫ͒̍̈́́ͦͩ̑̃̍̑ͨͧͣ̑͋̓̎̄̎̐͛̂̇̆̿̋̚̕͟͜͟͡͠m ̶̶̷̵̸̡̢̡̢̡̧͙̟͉͕͚̦̥̫͓̟͍͉̖̘̰̠̰̟̳̺̖̜͈̟͓̩͎͔͎̭̞̮̤̙̗͕͖̰̪̙̭̖̗̤̬ͥͫͦ̊̿̓͋ͮͫ͊́̈̐̇́ͭͥͫͨ̂̐̿̋͊̌ͨͧ̿̓̄̈́ͫ́͂ͥ͆ͯ̕̕͜͠͡͞͠t̸̸̴̵̴̷̵̷̴̶̷̨̨͎̮͓̙͕̯̝̝͕̰͚̼̤̞̥̬̪̰̝̻̲̫̪͚̦͖̾͒͌͗̽ͭ̄͛̌͑̏̋͒ͦ̊ͣͨ̊ͣ̑͛ͬ͊͐̎̓͆͂̈̐ͨ̊̂ͦ́͒ͪ̇̑̉ͨ̽͋̊̃ͨͮͮ̿̑́́ͧ̚͘͜͠͝͞ͅͅe̶̷̵̵̴̢̨̨̥͓͎̺͇͖̹͈̱̲͎̤̱̖̘̺̝͙̞͍̠̼͎͍̲̠͇͉͕̞̳̞̞̤͕͎̳̠̥̼̺̥͉͌ͪ͂ͮ̐ͬ̾͛̽̿̇͐ͯ̑̆ͯ̽͊ͯͥ͌̑̀ͩͪ͌͑͗͑̇̂ͬ́̾̐̀͂͑̾̀̂͘͜͢͟͜͠͡͡x̷̸̵̸̵̴̴̸̡͍̱̥̩͕̫̳͔̻̦͓̪̫̪͎͉̩͈̺̻̠̫͙̩̘̰͎̟̫͖͍̳͖̲̜̦̪̬̗̼̻̞̓̄͊͐̓ͪ͂̑̈̑̈́̽̄̑͌͒ͨͨ̍̉ͬ̓̓̃̓͗̿̈́̓ͫ̑ͣ̇̇̍̓̀̕͘͢͟͜͜͜͜͠͠ͅt ̵̸̨̢̨̡̨̛̱̜̖̠̫͔͎͈̩̺͈̭͔̻̯̹̜̤̳̮͖̼̥̝̗̖̝͕̬̜̭͚̗̻̬̳͓̲̫̰͉ͩ̍̄̈͊̊̃ͨ̅̐ͬ͑ͫ̉ͨ͌̆͌̆͌ͬͦͧͬ̅̈́ͯ̏ͥ̅͒ͭ̋̄ͦ̈ͫ͘͟͢͜͢͟͡͡͝͞͞͝ͅͅͅ1̸̸̷̸̸̵̴̸̧̧̢̛̠̲̥̱̩̺͇͚̤͓̤̝̦̹̬̞̠̩̩̱͍͙̯̰̺̙̺͖̦͈͚̭͎̹̰̩̲͖̘̗̑ͩ̈́̉͂́̇̽̌ͥ̃͛ͩ̊ͤ͊̊̍ͬ̓ͩ̃̃ͭ͛ͬ͑ͨͦ̂ͩͨ͛͊̎̈́͌̚̕̕͢͢͜͡͝͠ͅ2̴̸̷̴̸̵̶̵̧̢̧̨̨̭̩͚̖̤̺͚͕͈͙͔̹̤̹͔̼͔̻͈̱̬͎̟͎̯͉̻͉̲͎̭̋̑ͫ͋͑͂͒ͬ̿ͩ͌͒͋̐ͯͪ̑̑ͬ̇͗ͨ̎͑̊̆̐̌͒ͯ̄͂ͬ̈́ͯ͒ͬ̾ͩ̎̀̽ͪ̎̐̐́̍̅̚̕͘͞͠͡3̸̷̧̨̨̢̡̨̞̗̦̘̹͎̼͔̭̟̭̟̩̘͖͉̹̼̦̭̘͈̜͔̟̙̯̙̹̭͔̲͉͎̰̙̜̯͕̭̭ͪͦͥ̆͗̏ͦ̆ͩ̈́̄̋̂ͪ͋̈̎̑̽̑͋͊̀͒̃ͮͤ̆ͤ̀̏͛́ͯ̽̎͛̅̈́ͭ̏̚̚͘͜͢͝͠͠͡͞͝4