Sort array of objects by date property

Question

Hello guys I want to sort array by " New_date " but in some cases there is another object inside of main object with key " New_date ". Do you know how could I sort array in this case?

  arr.sort(function(a, b) {

        a = new Date(a.New_date);
        b = new Date(b.New_date);
        return a>b ? -1 : a<b ? 1 : 0;
    });

arr= 
[0: {name:"Angel", data "random data", New_date: "2020-12-10"},  
 1: [0: {name:"Tom", data "random data"},
     1: {name:"Tom", data "random data"},
     New_date:"2020-11-10"],  
 2:name:"Angel", data "random data", New_date: "2020-09-10"}]

Answer 1

Here is a solution with a correctly formatted array.

 let arr = [ { name: "Angel", data: "random data", New_date: "2020-12-10" }, { name: "Tom", data: "random data", New_date: "2019-11-10" }, { name: "Tom", data: "random data", New_date: "2020-11-10" }, { name: "Angel", data: "random data", New_date: "2020-09-10" }, ] console.log('ascending', arr.sort((a, b) => new Date(a.New_date) - new Date(b.New_date))) console.log('descending', arr.sort((a, b) => new Date(b.New_date) - new Date(a.New_date)))