对于那些不能使用ES6的人，您可以使用lodash或下划线。

_.omit(x, 'b')

或者拉姆达。

R.omit('b', x)

var clone = Object.assign({}, {a: 1, b: 2, c: 3});
delete clone.b;

或者如果你接受属性为未定义:

var clone = Object.assign({}, {a: 1, b: 2, c: 3}, {b: undefined});

我以Redux减速机为例:

 const clone = { ...state };
 delete clone[action.id];
 return clone;

换句话说:

const clone = { ...originalObject } // note: original object is not altered
delete clone[unwantedKey]           // or use clone.unwantedKey or any other applicable syntax
return clone                        // the original object without the unwanted key

如果你正在处理一个巨大的变量，你不希望复制它，然后删除它，因为这将是低效的。

一个简单的带有hasOwnProperty检查的for循环应该可以工作，而且它更适合未来的需求:

for(var key in someObject) {
        if(someObject.hasOwnProperty(key) && key != 'undesiredkey') {
                copyOfObject[key] = someObject[key];
        }
}

补充一下Ilya Palkin的回答:你甚至可以动态删除键:

const x = {a: 1, b: 2, c: 3, z:26};

const objectWithoutKey = (object, key) => {
  const {[key]: deletedKey, ...otherKeys} = object;
  return otherKeys;
}

console.log(objectWithoutKey(x, 'b')); // {a: 1, c: 3, z:26}
console.log(x); // {a: 1, b: 2, c: 3, z:26};

演示在巴别塔REPL

来源:

https://twitter.com/ydkjs/status/699845396084846592

使用对象解构

Const省略=(道具，{[道具]:_，…Rest}) => Rest; Const obj = {a: 1, b: 2, c: 3}; const objWithoutA =省略('a'， obj); console.log (objWithoutA);// {b: 2, c: 3}