你可以这样做:

const base = {
  item1: { key: 'sdfd', value:'sdfd' },
  item2: { key: 'sdfd', value:'sdfd' },
  item3: { key: 'sdfd', value:'sdfd' }
};

const filtered = (
    source => { 
        with(source){ 
            return {item1, item3} 
        } 
    }
)(base);

// one line
const filtered = (source => { with(source){ return {item1, item3} } })(base);

这是可行的，但不是很清楚，加上with语句不推荐(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/with)。

使用PropPick包

pick('item1 item3', obj);
// {
//   item1: { key: 'sdfd', value:'sdfd' },
//   item3: { key: 'sdfd', value:'sdfd' }
// }

好吧，这样怎么样:

const myData = {
  item1: { key: 'sdfd', value:'sdfd' },
  item2: { key: 'sdfd', value:'sdfd' },
  item3: { key: 'sdfd', value:'sdfd' }
};

function filteredObject(obj, filter) {
  if(!Array.isArray(filter)) {
   filter = [filter.toString()];
  }
  const newObj = {};
  for(i in obj) {
    if(!filter.includes(i)) {
      newObj[i] = obj[i];
    }
  }
  return newObj;
}

像这样叫它:

filteredObject(myData, ['item2']); //{item1: { key: 'sdfd', value:'sdfd' }, item3: { key: 'sdfd', value:'sdfd' }}

我很惊讶居然没有人提出这个建议。它非常干净，非常明确地告诉你想要保留哪些键。

const unfilteredObj = {a: ..., b:..., c:..., x:..., y:...}

const filterObject = ({a,b,c}) => ({a,b,c})
const filteredObject = filterObject(unfilteredObject)

或者如果你想要一个脏的眼线笔:

const unfilteredObj = {a: ..., b:..., c:..., x:..., y:...}

const filteredObject = (({a,b,c})=>({a,b,c}))(unfilteredObject);

我最近是这样做的:

const dummyObj = Object.assign({}, obj);
delete dummyObj[key];
const target = Object.assign({}, {...dummyObj});

只是现代JS的另一个解决方案，没有外部库。

我在玩“解构”功能:

Const raw = { Item1: {key: 'sdfd'， value: 'sdfd'}， Item2: {key: 'sdfd'， value: 'sdfd'}， Item3:{键:'sdfd'，值:'sdfd'} }; var myNewRaw = (({item1, item3}) => ({item1, item3}))(raw); console.log (myNewRaw);