我们有多种方法来删除Object属性。

箭头函数:我们还可以使用箭头函数从对象中删除属性，这是一个单行解决方案。

const obj = {
    'first': 'one',
    'second': 'two',
    'third': 'three'
}

const fn = (key, { [key]: deletedKey, ...others }) => others;

console.log(fn('first', obj))        // { 'second': 'two', 'third': 'three' }

Reduce方法:在javascript中我们可以使用Reduce方法从原始对象中删除特定的属性。

const obj = {
    'first': 'one',
    'second': 'two',
    'third': 'three'
}

const exceptSecond = Object.keys(obj).reduce((acc, key) => {
    if (key !== 'second') {
        acc[key] = obj[key]
    }
    return acc
}, {})

console.log(exceptSecond)    // { 'first': 'one', 'third': 'three' }

删除:这是一种简单的删除方法。

delete obj.first; 
// Or
delete obj['first'];

使用unset，省略，Pic方法从"loadash" lib:

    import { unset } from 'lodash'


const obj = {
    'first': 'one',
    'second': 'two',
    'third': 'three'
}

unset(obj, 'third')        // true

console.log(obj)        // { 'first': 'one', 'second': 'two' }

// Using omit 
import { omit } from 'lodash'
const obj1 = {
    'first': 'one',
    'second': 'two',
    'third': 'three'
}

omit(obj1, [ 'first', 'second' ])

console.log(obj1)  

反射删除属性:这是ES6中引入的新的内置对象。现在可以通过调用这个Refect对象的deleted property()函数来删除对象属性。

这个函数等价于我们在第一个方法中讨论的delete操作符。

const someObject = {
    'first': 'one',
    'second': 'two',
    'third': 'three'
}

Reflect.deleteProperty(someObject, 'second')

console.log(someObject)        //  { 'first': 'one', 'third': 'three' }

来自Mozilla文档，“您可以使用delete操作符删除隐式声明的变量，但不能删除用var语句声明的变量。”

链接如下:https://developer.mozilla.org/En/Core_JavaScript_1.5_Reference:Operators:Special_Operators:delete_Operator

Setting a variable to null makes sure to break any references to objects in all browsers including circular references being made between the DOM elements and Javascript scopes. By using delete command we are marking objects to be cleared on the next run of the Garbage collection, but if there are multiple variables referencing the same object, deleting a single variable WILL NOT free the object, it will just remove the linkage between that variable and the object. And on the next run of the Garbage collection, only the variable will be cleaned.

这对我很有用，尽管这不是一个好的练习。它简单地删除所有的 对象所属的关联元素。

 for (element in homeService) {
          delete homeService[element];
  }

ie5到ie8有一个错误，在主机对象(Window, Global, DOM等)的属性上使用delete会抛出TypeError“对象不支持此操作”。

var el=document.getElementById("anElementId");
el.foo = {bar:"baz"};
try{
    delete el.foo;
}catch(){
    //alert("Curses, drats and double double damn!");
    el.foo=undefined; // a work around
}

稍后，如果你需要检查属性在哪里具有完整的含义，请使用el。Foo !== undefined，因为“Foo”在el 在IE中总是返回true。

如果你真的想让房子消失……

function hostProxy(host){
    if(host===null || host===undefined) return host;
    if(!"_hostProxy" in host){
       host._hostproxy={_host:host,prototype:host};
    }
    return host._hostproxy;
}
var el=hostProxy(document.getElementById("anElementId"));
el.foo = {bar:"baz"};

delete el.foo; // removing property if a non-host object

如果你需要使用主机api的主机对象…

el.parent.removeChild(el._host);

delete操作符从数组中删除对象、对象的属性或元素。操作符还可以删除未使用var语句声明的变量。 在下面的例子中，'fruits'是一个声明为var的数组，并被删除了(真的吗??)

delete objectName
delete objectName.property
delete objectName[index] 
delete property // The command acts  only within a with statement.

var fruits = new Array("Orange", "Apple", "Banana", "Chery");
var newParagraph = document.createElement("p"); 
var newText = document.createTextNode("Fruits List : " + fruits);
newParagraph.appendChild(newText);
document.body.appendChild(newParagraph);
//Delete the array object.
delete fruits;
var newParagraph1 = document.createElement("p");
var newText1 = document.createTextNode("Display the Fruits after delete the array object - Fruits List : "+ fruits;); 
newParagraph1.appendChild(newText1);
document.body.appendChild(newParagraph1);

https://www.w3resource.com/javascript/operators/delete.php