JAVASCRIPT

how to remove a property from an object in javascript

 var person = {
        name: "Harry",
        age: 16,
        gender: "Male"
    };
    
    // Deleting a property completely
    delete person.age;
    alert(person.age); // Outputs: undefined
    console.log(person); // Prints: {name: "Harry", gender: "Male"}

Delete Properties from a JavaScript Object

var ourDog = {
  "name": "Camper",
  "legs": 4,
  "tails": 1,
  "friends": ["everything!"],
  "bark": "bow-wow"
};

delete ourDog.bark;

How do I remove a property from a JavaScript object?

delete myObject.regex;
// OR
delete myObject['regex'];

how to remove property from object javascript

let myObject = {
  "ircEvent": "PRIVMSG",
  "method": "newURI",
  "regex": "^http://.*"
};

const {regex, ...newObj} = myObject;

console.log(newObj);   // has no 'regex' key
console.log(myObject); // remains unchanged

delete certain property from object in javascript

/*The JavaScript delete operator removes a property from an object;
*/
const Employee = {
  firstname: 'John',
  lastname: 'Doe'
};

console.log(Employee.firstname);
// expected output: "John"

delete Employee.firstname;

console.log(Employee.firstname);
// expected output: undefined

remove object property javascript es6

// ES6 should be in search keyword
Reflect.deleteProperty(myObj, propNameString);
// Source referece in Chinese.

how to delete object properties in javascript

// Creates a new object, myobj, with two properties, a and b.
var myobj = new Object;
myobj.a = 5;
myobj.b = 12;

// Removes the a property, leaving myobj with only the b property.
delete myobj.a;
console.log ('a' in myobj); // output: "false"

removing a property from an object

//Easy way around by using rest parameters

const response = [{
    drugName: 'HYDROCODONE-HOMATROPINE MBR',
    drugStrength: '5MG-1.5MG',
    drugForm: 'TABLET',
    brand: false
},
{
    drugName: 'HYDROCODONE ABC',
    drugStrength: '10MG',
    drugForm: 'SYRUP',
    brand: true
}]

const output = response.map(({ drugName, ...rest }) => rest)

/* output = [{
    drugStrength: '5MG-1.5MG',
    drugForm: 'TABLET',
    brand: false
},
{
    drugStrength: '10MG',
    drugForm: 'SYRUP',
    brand: true
}]
*/

remove property from object javascript

const { a, ...rest } = { a: 1, b: 2, c: 3 };

delete all properties from an javascript object

req.session.user = { name: 'Alexander' };  // we store an object in the session
var session = req.session;                 // save reference to the session in a variable
console.log( req.session, session );       // {user: Object}, {user: Object}

req.session = {};                          // let's replace session with a new object
console.log( req.session, session );       // {}, {user: Object}

Delete object properties in JavaScript

for (var k in myObj) {
    if (k !== 'p1' && k !== 'p2' && k !== 'p100') {
        delete myObj[k];
    }
}

How do I remove a property from a JavaScript object

var myObject = {
    "ircEvent": "PRIVMSG",
    "method": "newURI",
    "regex": "^http://.*"
};
delete myObject.regex;

console.log(myObject);