JS - Why array.sort() doesn't return the same result for objects and numbers?

5

Sorting an array of objects (by a property of type number) doesn't return a sorted result like for an array of numbers.
Why so ?
How to make it sort like for numbers ?

Demo: Sorting an array of numbers

const sorted = [0,  5,  2, undefined,  3,  1,  4]
  .sort((a, b) => a - b);
  
console.log(sorted);

Demo: Sorting an array of objects

const notSorted = [
  {i:0},
  {i:5},
  {i:2},
  {i: undefined},
  {i:3},
  {i:1},
  {i:4},
]
  .sort((a, b) => a.i - b.i)
  .map(a => a.i);
  
console.log(notSorted);

I am currently on Chrome 90. Maybe some other browsers or engines don't have this issue. Tell me.

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asked May 6 at 14:49

YairoproYairopro

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