Remove a property from an object in JavaScript

This post will discuss how to remove a property from an object in JavaScript.

1. Using Delete Operator

The delete operator removes a given property from an object, returning true or false as appropriate on success and failure.

var person = { name: 'John', age: 23, sex: 'Male' };

delete person.age;

console.log(person);

Output: { name: 'John', sex: 'Male' }

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2. Using Spread operator

With ES6, you can use the object literal destructuring assignment to unpack properties from objects into distinct variables. This is demonstrated below:

var person = { name: 'John', age: 23, sex: 'Male' };

const { age, ...rest } = person;

console.log(rest);

Output: { name: 'John', sex: 'Male' }

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Note this will create a new object. You can even do this without a declaration by using parentheses ( … ) around the assignment statement.

var person = { name: 'John', age: 23, sex: 'Male' };

({ age, ...rest } = person);

console.log(rest);

Output: { name: 'John', sex: 'Male' }

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3. Using `Reflect.deleteProperty()` function

The Reflect.deleteProperty() method is used to delete a property on an object. It is identical to the delete operator.

var person = { name: 'John', age: 23, sex: 'Male' };

Reflect.deleteProperty(person, 'age');

console.log(person);

Output: { name: 'John', sex: 'Male' }

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4. Using Underscore/Lodash Library

If you’re already using the Underscore or Lodash library, consider using the _.omit method. It creates a copy of the object without the specified property.

var _ = require('underscore');

var person = { name: 'John', age: 23, sex: 'Male' };

person = _.omit(person, 'age');

console.log(person);

Output: { name: 'John', sex: 'Male' }

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That’s all about removing a property from an object in JavaScript.

Remove a property from an object in JavaScript

1. Using Delete Operator

2. Using Spread operator

3. Using Reflect.deleteProperty() function

4. Using Underscore/Lodash Library

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3. Using `Reflect.deleteProperty()` function