finding the smallest number in an array javascript

const arr = [14, 58, 20, 77, 66, 82, 42, 67, 42, 4]
const min = Math.min(...arr)
console.log(min)// For large data, it's better to use reduce. Supose arr has a large data in this case:
const arr = [1, 5, 3, 5, 2];
const max = arr.reduce((a, b) => { return Math.max(a, b) });

// For arrays with relatively few elements you can use apply: 
const max = Math.max.apply(null, arr);

// or spread operator:
const max = Math.max(...arr);
function removeSmallest(arr) {
    var min = Math.min(...arr);
    return arr.filter(e => e != min);
}Array.min = function( array ){
    return Math.min.apply( Math, array );
};
var arr = [5,1,9,5,7];
var smallest = arr[0];

for(var i=1; i<arr.length; i++){
    if(arr[i] < smallest){
        smallest = arr[i];   
    }
}

console.log(smallest);