1
var maxWidthOfVerticalArea = function (points) {
2
  let ans = 0;
3
  points = points.map((item) => item[0]).sort((a, b) => a - b);
4

5
  for (let i = 1; i < points.length; i++) {
6
    ans = Math.max(ans, points[i] - points[i - 1]);
7
  }
8

9
  return ans;
10
};