Finding the height based on width and screen size ratio (width:height) in JavaScript

Problem

We are required to write a JavaScript function that takes in the width of the screen as the first argument and the aspect ratio (w:h) as the second argument. Based on these two inputs our function should return the height of the screen.

Example

Following is the code −

 Live Demo

const ratio = '18:11';
const width = 2417;
const findHeight = (ratio = '', width = 1) => {
   const [w, h] = ratio
   .split(':')
   .map(Number);
   const height = (width * h) / w;
   return Math.round(height);
};
console.log(findHeight(ratio, width));

Output

Following is the console output −

1477