The missing random number generator for JavaScript with a random number tester function that displays the spread of random numbers on a given iteration count.

JS_random.js

function random(min, max) {
  /* defaults to: 1-10 */
  min = isNaN(+min) ? 1 : +min
  max = isNaN(+max) ? 10 : +max
  return Math.floor(Math.random() * (max-min+1)+min)
}
/*
examples: 
random(1,80)        -> 1-80
random()            -> 1-10 (using the defaults)
random("")          -> 0-10
random(false, true) -> 0-1
random(0.1, 9.5)    -> 0-10 but only 10% chance of a 0, and only 50% chance of 10
*/


//To test the spread of your random numbers: 
/* 
function testRandom(min, max, amount){
  const nums = []
  for(let i=0; i<amount;i++){
    nums.push(random(min, max))
  }
  const randomCount = Array.from(new Set(nums)).reduce((acc, v)=>Object.assign(acc, acc[v.toString()]=0), {})
  nums.forEach(v=>randomCount[v]++)
  console.table([randomCount])
} 
testRandom(0.2, 5.7, 1000)
*/