How to validate latitude and longitude

The latitude must be a number between -90 and 90 and the longitude between -180 and 180.

Here are the functions to validate it in JavaScript.

1. Latitude must be a number between -90 and 90

const isLatitude = num => isFinite(num) && Math.abs(num) <= 90;

2. Longitude must a number between -180 and 180

const isLongitude = num => isFinite(num) && Math.abs(num) <= 180;