javascript - JS: Ordered iteration of object -

there object this...

{   2016: {     3 : [       { field: "content 1" }       { field: "content 2" }     ]     10 : [       { field: "content 3" }     ]   }   2017: {     8 : [       { field: "content 4" }     ]   } } 

...and need access subelements in ascending order. means want process 2016 object first, 2017 object.

within need process month objects in ascending order.

iteration like...

for (var year in map) {     if (map.hasownproperty(year)) {         console.log(year)     } } 

won't job properly.

javascript objects aren't ordered, first thing need grab keys, sort them, , iterate in order.

 data = {        2016: {          3 : [            { field: "content 1" },            { field: "content 2" },          ],          10 : [            { field: "content 3" },          ],        },        2017: {          8 : [            { field: "content 4" },          ],        },      };            var keys = object.keys(data);      var sortedkeys = keys.sort(function(a, b) {return parseint(a) - parseint(b)});            (var = 0; < sortedkeys.length; i++) {        var key = sortedkeys[i];        console.log(data[key]);      }