[рони]

надо чтоб искало по всем

<script>
var people = [
  { "name": "bob", "dinner": "pizza" },
  { "name": "john", "dinner": "sushi" },
  { "name": "john", "dinner": "hummus" }
];
var str = "sushi";

var obj = people.filter(function (person) { return Object.values(person).some(function(val) {
  return val.toUpperCase() == str.toUpperCase()
})});
document.write(JSON.stringify(obj, null, 4))

</script>