javascript - Is it possible to pass a map with not ordered integer keys as a json to UI? -

i'm trying pass map int keys ui in json format. use linkedhashmap @ server side , compose follows:

{  3: "some value 3",  1: "some value 1",  2: "some value 2" } 

but when check coming object @ ui side map sorted key:

{  1: "some value 1",  2: "some value 2",  3: "some value 3" } 

i tried use treemap works in same way.

i'm wondering why initial order has broken when using int keys whereas order preserved when uses not integer keys.