如何在JavaScript ES5中从数组返回重复的对象计数

function countDuplicateObjects(arr) {
  var count = {};
  var duplicates = [];

  for (var i = 0; i < arr.length; i++) {
    var obj = arr[i];
    var key = JSON.stringify(obj);

    if (count[key]) {
      count[key]++;
    } else {
      count[key] = 1;
    }
  }

  for (var key in count) {
    if (count.hasOwnProperty(key) && count[key] > 1) {
      duplicates.push(JSON.parse(key));
    }
  }

  return duplicates;
}

// 示例用法
var arr = [
  { name: "apple", color: "red" },
  { name: "banana", color: "yellow" },
  { name: "apple", color: "red" },
  { name: "orange", color: "orange" },
  { name: "banana", color: "yellow" }
];

var duplicates = countDuplicateObjects(arr);
console.log(duplicates);