Add Property To Object Javascript

add property to object javascript Square Bracket Notation to add a property in JS Object, Modify a Property of a Javascript Object and Dynamically add property to object javascript.

Contents

There’re a 5 ways to add properties to an object in JavaScript Example.

memberObject.result = 1;

memberObject['result'] = 1;
memberObject['result-bar'] = 1;

Example

var memberObject = { Name: "Virat" };

memberObject.Age = 28;
console.log(memberObject.Age)

memberObject['Country'] =  "India"
console.log(memberObject.Country)

Javascript adds a property to Object.

let memberObject = {
  name: 'Darshini',
  age: 27,
  education: 'MCA'
};

console.log(memberObject)

memberObject.school = 'DSP';
console.log('After adding a property using dot syntax');
console.log(memberObject);

Result

{ name: 'Darshini', age: 27, education: 'MCA' }
After adding a property using dot syntax
{ name: 'Darshini', age: 27, education: 'MCA', school: 'DSP' }

Square Bracket Notation to add a property in JS Object

memberObject['school'] = 'DSP';

// app.js

let memberObject = {
  name: 'Darshini',
  age: 27,
  education: 'MCA'
};

console.log(memberObject)

memberObject['school'] = 'DSP';
console.log('After adding a property using square bracket syntax');
console.log(memberObject);

Result

{ name: 'Darshini', age: 27, education: 'MCA' }
After adding a property using square bracket syntax
{ name: 'Darshini', age: 27, education: 'MCA', school: 'DSP' }

don’t miss : Javascript Object Class

Modify a Property of a Javascript Object

// app.js

let memberObject = {
  name: 'Darshini',
  age: 27,
  education: 'MCA'
};

console.log(memberObject)

memberObject['age'] = 26;
memberObject['name'] = 'Rakesh';
console.log('After modifying a property using square bracket');
console.log(memberObject);

Result

{ name: 'Darshini', age: 27, education: 'MCA' }
After modifying a property using square bracket
{ name: 'Rakesh', age: 26, education: 'MCA' }

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add property to object javascript – How to Add Property to an object in JavaScript?