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how javascript closures work?

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Himanshu Jangid answered on May 17, 2021 Popularity 10/10 Helpfulness 2/10

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how javascript closures work?

Comment

function foo() {
  const secret = Math.trunc(Math.random() * 100)
  return function inner() {
    console.log(`The secret number is ${secret}.`)
  }
}
const f = foo() // `secret` is not directly accessible from outside `foo`
f() // The only way to retrieve `secret`, is to invoke `f`
 Run code snippet

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: stackoverflow.com

Tags: closures javascript

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Contributed on Jun 16 2022

Himanshu Jangid

0 Answers Avg Quality 2/10

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closures in javascript

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// A closure is a function having access to the parent scope, 
// even after the parent function has popped.

function greeting() {
    let message = 'Hi';

    function sayHi() {
        console.log(message);
    }

    return sayHi;
}
let hi = greeting();
hi(); // still can access the message variable

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Source: www.javascripttutorial.net

Tags: closures closure

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Contributed on Feb 01 2022

madhav

0 Answers Avg Quality 2/10

Closures in javascript

Comment

let counter = (function() {
    let i = 0; // private property

    return {   // public methods
        get: function() {
            alert(i);
        },
        set: function(value) {
            i = value;
        },
        increment: function() {
            alert(++i);
        }
    };
})(); // module

counter.get();      // shows 0
counter.set(6);
counter.increment(); // shows 7
counter.increment(); // shows 8

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: en.wikipedia.org

Tags: closures closure

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Contributed on Apr 29 2022

Ali Salman

0 Answers Avg Quality 2/10

js closure examples

Comment

function outer() {
  var counter = 0; // Backpack or Closure
  function incrementCounter() {
    return counter++;
  }
  return incrementCounter;
}

const count = outer();
count(); // 0
count(); // 1
count(); // 2

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on May 17 2021

Obviously you're not a golfer.

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closure example in javascript

Comment

function outerFunction() {
  var outerVariable = 'I am an outer variable';

  function innerFunction() {
    var innerVariable = 'I am an inner variable';
    console.log(outerVariable);
  }

  return innerFunction;
}

var closureExample = outerFunction();
closureExample();

Popularity 8/10 Helpfulness 3/10 Language javascript

Source: Grepper

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Contributed on Sep 11 2023

YOU.com

0 Answers Avg Quality 2/10

JavaScript - Closures

Comment

function makeAdder(x) {
  return function(y) {
    return x + y;
  };
}

var add5 = makeAdder(5);
var add10 = makeAdder(10);

console.log(add5(2));  // 7
console.log(add10(2)); // 12

//=====
//add5 and add10 are both closures. 
//They share the same function body definition, but store different lexical environments. 
//In add5's lexical environment, x is 5, while in the lexical environment for add10, x is 10.

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Source: developer.mozilla.org

Tags: closures closure

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Contributed on Jul 19 2021

The Arborist

0 Answers Avg Quality 2/10

what is closure in JavaScript

Comment

A combination of a function object and a scope (a set of variable bindings)

in which the function's variables are resolved is called a closure.

Callbacks are functions that are passed into another function as an argument.

Closures are functions that are nested in other functions, and it's often used to avoid scope clash

with other parts of a JavaScript program

<button type="button" onclick="funClosure()">Click to Count</button>

<p id="displayValue">0</p>
<script>
const add = (function(){
	let count = 0;
    return function(){
		count += 1;
        return count;
    }
})();

function funClosure(){
  document.getElementById("displayValue").innerHTML = add();
}
</script>

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Mar 31 2023

@CodeGrepperManu

0 Answers Avg Quality 2/10

JavaScript Closures

Comment

// javascript closure example

// outer function
function greet() {
    // variable defined outside the inner function
    let name = 'John';
    // inner function
    function displayName() {

        // accessing name variable
        return 'Hi' + ' ' + name;
      
    }
    return displayName;
}

const g1 = greet();
console.log(g1); // returns the function definition
console.log(g1()); // returns the value

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: closures closure

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Contributed on May 22 2022

SAMER SAEID

0 Answers Avg Quality 2/10

what is a closure in javascript

Comment

// A Closure gives you access to an outer function's scope from an inner function.
// Example
function myNameIs(name) {
  return function(){
  	console.log('Hi my name is ' + name);
  }
}

let maxine = myNameIs('Maxine');
let amber = myNameIs('Amber');

maxine();
amber();

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Aug 10 2022

Maryam Joseph

0 Answers Avg Quality 2/10

JavaScript Closures

Comment

function createCounter() {
  var count = 0;

  return {
    increment: function() {
      count++;
    },
    decrement: function() {
      count--;
    },
    getCount: function() {
      return count;
    }
  };
}

var counter = createCounter();
counter.increment();
counter.increment();
console.log(counter.getCount()); // Output: 2

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: chat.openai.com

Tags: closures closure

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Contributed on Jun 16 2023

Asim Ehmedov

0 Answers Avg Quality 2/10

how javascript closures work?

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