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why can't you use arrow function with this in javascript for declaring methods

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tinydev answered on June 17, 2021 Popularity 10/10 Helpfulness 2/10

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why can't you use arrow function with this in javascript for declaring methods

Comment

'use strict';

var obj = { // does not create a new scope
  i: 10,
  b: () => console.log(this.i, this),
  c: function() {
    console.log(this.i, this);
  }
}

obj.b(); // prints undefined, Window {...} (or the global object)
obj.c()

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: function javascript methods this

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Contributed on Jul 16 2021

tinydev

0 Answers Avg Quality 2/10

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arrow function in javascript

Comment

// arrow function shorten way to write function
//it make easy to write callback function
const arrowFunction = names.map((name)=> {
return name.length <6 ? "long name" :"short name"
})
//if we have one parameter in callback function we don't need to add parenthesis ()
//if there is only one code logic and return value then we can remove return and {}
const arrowFunction = names.map(name=> name.length<10 ? "long name" :"short name" )

Popularity 9/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: function functio

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Contributed on Aug 08 2022

Shirshak Kandel

0 Answers Avg Quality 2/10

how to write an arrow function in javascript?

Comment

function double(x) { return x * 2; } // Traditional way
console.log(double(2)) // 4


const double = x => x * 2; // Same function written as an arrow function with implicit return
console.log(double(2)) // 4

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: mbeaudru.github.io

Tags: function functio

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Contributed on Jun 16 2022

Better Badger

0 Answers Avg Quality 2/10

arrow functions javascript

Comment

// Traditional Function Expression
var add = function(a,b){
  return a + b;
}

// Arrow Function Expression
var arrowAdd = (a,b) => a + b;

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: www.interviewbit.com

Tags: arrow-functions

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Contributed on Jun 17 2021

Cooperative Chimpanzee

0 Answers Avg Quality 2/10

arrow function javascript rules

Comment

const sayHi = ()=>console.log('Hi');

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: codeburst.io

Tags: function functio

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Contributed on Jan 01 2022

Fantastic Falcon

0 Answers Avg Quality 2/10

Arrow functions syntax

Comment

const introduction = () => {
    console.log("Hello, my name is Jessica.");
};

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: sabe.io

Tags: arrow-functions

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Contributed on Nov 05 2022

Spotless Stag

0 Answers Avg Quality 2/10

what is arrow function in javascript

Comment

An arrow function is a shorter syntax for writing function expressions in JavaScript. They are a more concise way to create functions, and do not have their own this, arguments, super, or new.target. Arrow functions are best suited for non-method functions, and they cannot be used as constructors.

Here is an example of an arrow function:

const add = (a, b) => {
  return a + b;
}
This is equivalent to:
function add(a, b) {
  return a + b;
}
Arrow functions are often used with higher-order functions (functions that operate on other functions) such as map, filter, and reduce.

const numbers = [1, 2, 3, 4, 5];
const doubled = numbers.map(x => x * 2);
// doubled is [2, 4, 6, 8, 10]

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: function functio

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Contributed on Jan 04 2023

Hustler

0 Answers Avg Quality 2/10

javascript this Inside Arrow Function

Comment

const greet = () => {
    console.log(this);
}
greet(); // Window {...}

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: function functio

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Contributed on May 22 2022

SAMER SAEID

0 Answers Avg Quality 2/10

javascript Arrow Function Syntax

Comment

let myFunction = (arg1, arg2, ...argN) => {
    statement(s)
}

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: function functio

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Contributed on May 21 2022

SAMER SAEID

0 Answers Avg Quality 2/10

arrow function javascript rules

Comment

const add3 = (num1, num2, num3) => return num1 + num2 + num3;

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: codeburst.io

Tags: function functio

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Contributed on Jan 01 2022

Fantastic Falcon

0 Answers Avg Quality 2/10

why can't you use arrow function with this in javascript for declaring methods

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why can't you use arrow function with this in javascript for declaring methods

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