Free Online Tutorials

Method 1: ES3

function sort_obj_by_values(obj) {
  var sortable = [];
  for (var i in obj) {
    sortable.push([i, obj[i]]);
  }
  sortable.sort(function(a, b) {
    return a[1] - b[1];
  });
  var objSorted = {}
  sortable.forEach(function(item) {
    objSorted[item[0]] = item[1]
  })
  return objSorted
}

var obj = {
  a: 300,
  c: 60,
  b: 200,
  f: 1000,
  d: 400,
  e: 8 * 60 * 60
};

console.log(JSON.stringify(sort_obj_by_values(obj)))
//{"c":60,"b":200,"a":300,"d":400,"f":1000,"e":28800}

Method 2: ES6

function sort_obj_by_values(obj) {
  return Object.keys(obj).
  	sort(function(a,b){return obj[a]-obj[b]}).
    reduce((r, v) => ({ ...r, [v]: obj[v] }), {});  
}

Method 3: ES8, use Object.entries() to convert the object into an array

function sort_obj_by_values(obj) {
  return Object.entries(obj)
    .sort(([,a],[,b]) => a-b)
    .reduce((r, [k, v]) => ({ ...r, [k]: v }), {});  
}

Method 4: ES10, use Object.fromEntries() to convert array to object

function sort_obj_by_values(obj) {
  return Object.fromEntries(
    Object.entries(obj).sort(([,a],[,b]) => a-b)
  )
}

Method 5: TypeScript ES2019

/**
 * Represents an associative array of a same type.
 */
interface Dictionary<T> {
  [key: string]: T;
}

/**
 * Sorts an object (dictionary) by value or property of value and returns
 * the sorted result as a Map object to preserve the sort order.
 */
function sort<TValue>(
  obj: Dictionary<TValue>,
  valSelector: (val: TValue) => number | string,
) {
  const sortedEntries = Object.entries(obj)
    .sort((a, b) =>
      valSelector(a[1]) > valSelector(b[1]) ? 1 :
      valSelector(a[1]) < valSelector(b[1]) ? -1 : 0);
  return Object.fromEntries(sortedEntries);
}

Usage:

var list = {
  "one": { height: 100, weight: 15 },
  "two": { height: 75, weight: 12 },
  "three": { height: 116, weight: 9 },
  "four": { height: 15, weight: 10 },
};

var sortedObj = sort(list, val => val.height);

console.log(sortedObj)

Result:

{
  "four": {
    "height": 15,
    "weight": 10
  },
  "two": {
    "height": 75,
    "weight": 12
  },
  "one": {
    "height": 100,
    "weight": 15
  },
  "three": {
    "height": 116,
    "weight": 9
  }
}