multi-column-sort.js

var items = [{name:"a", age:22}, { name:"b", age:11}, {name:"a", age: 10}]
var sortingfields = {name:true, age:true} // This is used as a dictionary. Sort by "name" DESC and "age" ASC

// do the items sort
items.sort((a,b) => {
  for (col in sortingfields) { // added properties are positional
    if (a[col] != b[col]) { // if they are equal, sorting is made on the next column
      if (sortingfields[col] === true) return a[col] > b[col] // if ASC === true
      else return a[col] < b[col]
    }
  }
})