nullish coalescing operator in javascript

Add Answer

coder_king answered on September 14, 2021 Popularity 10/10 Helpfulness 3/10

answer nullish coalescing operator in javascript

related nullish coalescing js

related nullish coalescing operator javaScript

related js nullish coalescing ?? vs logical or ||

related coalescing operator javascript

related javascript null coalescing

related nullish coalescing operator js

nullish coalescing operator in javascript

Comment

//nullish coalescing operator in js
Expression:
	Left ?? Right
if left is null or undefined , then Right will be the value

let value = null ?? "Oops.. null or undefined";
console.log(value) //Oops.. null or undefined

value = undefined ?? "Oops.. null or undefined";
console.log(value) //Oops.. null or undefined

value = 25 ?? "Oops.. null or undefined";
console.log(value) // 25

value = "" ?? "Oops.. null or undefined";
console.log(value) // ""

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript nullish-coalescing

Link to this answer
Share Copy Link

Contributed on Jul 26 2022

coder_king

0 Answers Avg Quality 2/10

Closely Related Answers

nullish coalescing js

Comment

The nullish coalescing operator ( ?? ) is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined , and otherwise returns its left-hand side operand

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Sep 14 2021

Crowded Copperhead

0 Answers Avg Quality 2/10

nullish coalescing operator javaScript

Comment

// The nullish coalescing operator (??) provides a concise way to 
// assign a default value to a variable if the variable is null or undefined.
// (??) considers values that are not null or undefined as truthy. 
const res1 = undefined ?? 'Default'; // res7: 'Default'
const res2 = null ?? 'Default'; // res1: 'Default'
const res3 = NaN ?? 'Default';  // res3: 'Default'
const res4 = false ?? 'Default';// res5: false
const res5 = true ?? 'Default'; // res7: true
const res6 = '' ?? 'Default';   // res2: ''
const res7 = {} ?? 'Default';   // res6: {}
const res8 = 0 ?? 'Default';    // res4: 0

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Jun 15 2023

Aditya Pratap Singh

0 Answers Avg Quality 2/10

js nullish coalescing ?? vs logical or ||

Comment

The OR operator || uses the right value if left is falsy 
(e.g. "" or 0 or false), while the nullish coalescing operator ?? uses
the right value if left is null or undefined.

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: stackoverflow.chttps

Tags: javascript j

Link to this answer
Share Copy Link

Contributed on Oct 19 2022

Stupid Scarab

0 Answers Avg Quality 2/10

coalescing operator javascript

Comment

/* The coalescing operator is very nice to use with the optional chaining
for setting a default value. Thus, you could use the code below to fall
back on a default phone number which is an empty string */

const contactInfos = { address: "20B Rue Lafayette" };
console.warn(contactInfos.user?.phoneNumber ?? "")
// ""

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: coalescing c

Link to this answer
Share Copy Link

Contributed on Jan 02 2023

Mehedi Islam Ripon

0 Answers Avg Quality 2/10

javascript null coalescing

Comment

const value = null ?? 'Default Value';
console.log(value);  // Output: 'Default Value'

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Link to this answer
Share Copy Link

Contributed on Sep 12 2023

YOU.com

0 Answers Avg Quality 2/10

nullish coalescing operator js

Comment

const defaultValue = 'Default Value';
const value1 = null;
const value2 = undefined;
const value3 = 'Actual Value';

console.log(value1 ?? defaultValue); // Output: Default Value
console.log(value2 ?? defaultValue); // Output: Default Value
console.log(value3 ?? defaultValue); // Output: Actual Value

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: Grepper

Link to this answer
Share Copy Link

Contributed on Sep 11 2023

YOU.com

0 Answers Avg Quality 2/10

nullish coalescing operator in javascript

Contents

More Related Answers

nullish coalescing operator in javascript

Closely Related Answers

nullish coalescing js

nullish coalescing operator javaScript

js nullish coalescing ?? vs logical or ||

coalescing operator javascript

javascript null coalescing

nullish coalescing operator js

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.