JavaScript Sorting Arrays

Array

The sort() method sorts an array alphabetically:

Example

const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.sort(); // Apple,Banana,Mango,Orange

The reverse() method reverses the elements in an array.
You can use it to sort an array in descending order:

Example

const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.reverse(); // Orange,Mango,Banana,Apple

Numeric Sort

By default, the sort() function sorts values as strings.

This works well for strings ("Apple" comes before "Banana").

However, if numbers are sorted as strings, "25" is bigger than "100", because "2" is bigger than "1".

Because of this, the sort() method will produce incorrect result when sorting numbers.

You can fix this by providing a compare function:

Example

const points = [40, 100, 1, 5, 25, 10];
points.sort( (a, b) => (a - b) ); // 1,5,10,25,40,100

Use the same trick to sort an array descending:

Example

const points = [40, 100, 1, 5, 25, 10];
points.sort( (a, b) => (b - a) ); // 100,40,25,10,5,1

Ref