如果key不存在，javascript从对象数组中移除元素

var objArray = [
  { key: 1, value: 'A' },
  { key: 2, value: 'B' },
  { key: 3, value: 'C' }
];

var keyToRemove = 2;

var filteredArray = objArray.filter(function(item) {
  return item.key !== keyToRemove;
});

console.log(filteredArray);

[
  { key: 1, value: 'A' },
  { key: 3, value: 'C' }
]

var objArray = [
  { key: 1, value: 'A' },
  { key: 2, value: 'B' },
  { key: 3, value: 'C' }
];

var keyToRemove = 2;

var indexToRemove = objArray.findIndex(function(item) {
  return item.key === keyToRemove;
});

if (indexToRemove !== -1) {
  objArray.splice(indexToRemove, 1);
}

console.log(objArray);

[
  { key: 1, value: 'A' },
  { key: 3, value: 'C' }
]