Get the Minimum & Maximum Number from an Array in JavaScript

_minmax.ts

function min(target: Array<Number>): Number {
  const reducer = (lowerest, current) => current < lowerest ? current : lowerest
  return target.reduce(reducer)
}
 
function max(target: Array<Number>): Number {
  const reducer = (greatest, current) => current > greatest ? current : greatest
  return target.reduce(reducer)
}

forversion_max.ts

function max(target: Array<Number>): Number {
  let greatest: Number = 0;
  
  for (let i = 0; i < target.length; i++) {
    const current = target[i]
    if (current > greatest) {
      greatest = current
    }
  }
  
  return greatest
}