js遍历数组获取最大或最小id

let arr = [1,2,3,4,5,6,7,8,9];

//获取最大id
let max = Math.max.apply(null, arr);
console.log('获取最大id', max)

//获取最小id
let min = Math.min.apply(null, arr);
console.log('获取最小id', min)