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what is the difference between ?? and || javascript

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Badie96 answered on November 3, 2021 Popularity 10/10 Helpfulness 1/10

answer what is the difference between ?? and || javascript

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what is the difference between ?? and || javascript

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// What is the difference between ?? and || javascript/typescript
The difference between the two operators boils down to the difference 
between falsy and null/undefined. Where the logical or (||) operator takes 
the right operand in the case of a falsy value — which includes empty 
string, 0, false, NaN, etc. The nullish coalescing operator (??) takes 
the right operand only when the left side is set to null or undefined.
For example:
console.log(0 || 1); console.log("" || "a"); console.log(NaN || 1);
// 1				 "a"					 1
console.log(0 ?? 1); console.log("" ?? "a"); console.log(Nan ?? 1);
// 0				 ""						 Nan
console.log(undefined || 1);
// 1
console.log(undefined ?? 1);
// 1

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: between difference javascript

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Contributed on Jan 24 2023

Badie96

0 Answers Avg Quality 2/10

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difference between || and ?? in js

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// The main difference is that nullish coalescing(??) operator will only
// give the result as the right operand only if the left operand is either null or undefined.

// Whereas the OR(||) operator will give the result as right operand 
// for all the falsy values of the left operand.

const a = 0;
// a || 10 --> Will result in 10, as || operator considers 0 as falsy value and resulting the right side operand
console.log(`a || 10 = ${a || 10}`);
// a ?? 10 --> Will result in 0, as ?? operator considers 0 as truthy value and resulting the left side operand
console.log(`a ?? 10 = ${a ?? 10}`);

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: stackoverflow.com

Tags: between

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Contributed on Nov 03 2021

Anxious Alligator

0 Answers Avg Quality 2/10

Difference Between =, == And === In JavaScript

Comment

var number = 100;  // Here number variable assigned using = 

if (number == 100)
  // Here Comparision between two values using ==.
  // This will not check datatype irrespective of datatype it will do comparision  
  console.log("Both are equal");

else  
  console.log("Both are not equal");

if(number === "100")  //Here Comparision between two values using ===.
  // This will check datatype if it is same then it will do comparision otherwise it will go to else part  
  console.log("Both are equal");

else  
  console.log("Both are not equal");

/*
Output will be :- 
	Both are equal
	Both are equal
*/

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: between

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Contributed on Jul 06 2022

Saurabh_Pagrut

0 Answers Avg Quality 2/10

difference between =, == and === in javascript

Comment

/*
= operator in javascript is called as assign operator. It is used to assign
value to a variable, it is used as: */
variable = "value"
/*      ^^^
here, as you can see, it is saying that variable should be assigned(=) the value
"value" */

/*
== operator in javascript is called the equals operator. It is used to compare
equals between two values, ignoring their types(number, string, boolean, etc.),
it is used as: */
   (5 == "5") // true
/* ^^^^^^^^^^
here, as you can see, it is asking that 5 is equal to "5", ignoring the type, it
returns true as their value is 5 (Note that "5" is converted to 5 for checking
for == comparator) */

/*
=== operator in javascript is called the strict equals operator. It is used to
compare euals between two values, considering their types(number, string,
boolean, stc.), it is used as: */
   (5 === "5") // false
/* ^^^^^^^^^^^
here, as you can see, it is asing that 5 is equal to "5", considering the type,
it returns false as their values is same, but their type is not (Note that "5"
is not converted into 5 for checking for === comparator) */

Popularity 10/10 Helpfulness 2/10 Language javascript

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Contributed on Feb 24 2022

Pleasant Panther

0 Answers Avg Quality 2/10

difference between | and || in js

Comment

const a = 0;
// a || 10 --> Will result in 10, as || operator considers 0 as falsy value and resulting the right side operand
console.log(`a || 10 = ${a || 10}`);
// a ?? 10 --> Will result in 0, as ?? operator considers 0 as truthy value and resulting the left side operand
console.log(`a ?? 10 = ${a ?? 10}`);

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: between

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Contributed on Sep 01 2022

Blue-eyed Bug

0 Answers Avg Quality 2/10

what is the difference between ?? and || javascript

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difference between || and ?? in js

Difference Between =, == And === In JavaScript

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difference between | and || in js

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