A small javascript utility that will generate unique (hashed-type) strings.

uniqueGenerator.js

// Your unique variables here
const allCapsAlpha = [..."ABCDEFGHIJKLMNOPQRSTUVWXYZ"]; 
const allLowerAlpha = [..."abcdefghijklmnopqrstuvwxyz"]; 
const allUniqueChars = [...'~!@#$%^&*()_+`-=[]\\{}|;:\'",./<>?'];
const allNumbers = [..."0123456789"];

// This is the 'pattern', alternate the order if you want.
// The final output (order of pattern) will not be the same though, 
// but you can improve this utility to achieve that.
const base = [...allCapsAlpha, ...allNumbers, ...allLowerAlpha, ...allUniqueChars];

// The generator()
// base = the pattern you want to generate from
// len = the length of the output strings
const generator = (base, len) => {
   return [...Array(len)]
     .map(i => base[Math.random()*base.length|0])
     .join('');
};

// Test
console.log('OUTPUT: ', generator(base, 28));

// OUTPUT: )ne]iGl'XBX%(FPCU:4JRnV'#mS=
// OUTPUT: kRY.}PZ~]Q|LQ1;qJ1Gnh>,zC{T@