如何获取数组中"key“的值-Javasciript

var arr = [
  { key: "value1" },
  { key: "value2" },
  { key: "value3" }
];

for (var i = 0; i < arr.length; i++) {
  if (arr[i].key === "key") {
    console.log(arr[i].key);
    break;
  }
}

var arr = [
  { key: "value1" },
  { key: "value2" },
  { key: "value3" }
];

var result = arr.find(function(item) {
  return item.key === "key";
});

console.log(result.key);