create a random generator in javascript

index.tsx
function getRandom() {
  return Math.random();
}
getRandom(); // returns a random number between 0 and 1
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index.tsx
function getRandomInt(max) {
  return Math.floor(Math.random() * Math.floor(max));
}
getRandomInt(10); // returns a random integer between 0 and 9
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index.tsx
function randomString(length) {
  let result = '';
  let characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  let charactersLength = characters.length;
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
  }
  return result;
}

randomString(5); // returns a random string of length 5
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