find the maximum number of an array js

1var arr = [1, 2, 3];
2var max = arr.reduce(function(a, b) {
3  return Math.max(a, b);
4});

1//get min/max value of arrays
2function getArrayMax(array){
3   return Math.max.apply(null, array);
4}
5function getArrayMin(array){
6   return Math.min.apply(null, array);
7}
8var ages=[11, 54, 32, 92];
9var maxAge=getArrayMax(ages); //92
10var minAge=getArrayMin(ages); //11

1function getMaxOfArray(numArray) {
2    return Math.max.apply(null, numArray);
3}

1function maisBaratosQue(valor, precos) {
2   return precos.filter(p => p <= valor);
3}

1var arr = [1, 2, 3];
2var max = Math.max(...arr);
3

1Math.max(10, 20);   //  20
2Math.max(-10, -20); // -10
3Math.max(-10, 20);  //  20
4