bind in javascript

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Confused Curlew answered on April 27, 2020 Popularity 10/10 Helpfulness 2/10

answer bind in javascript

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bind in javascript

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bind() returns a bound function that, when executed later, will have the correct context ("this") for calling the original function.

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Source: Grepper

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Contributed on Apr 27 2020

Confused Curlew

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what is the use of bind method in javascript

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"Variables has local and global scopes. Let's suppose that we have two variables
with the same name. One is globally defined and the other is defined inside a
function closure and we want to get the variable value which is inside the
function closure. In that case we use this bind() method.

code:

var x = 9; // this refers to global "window" object here in the browser

var person = {
  x: 81, // local variable x = 81
  getX: function() {
    return this.x; // "this" = person , so this.x is the same as  person.x
  }
};
//  the next line of code is the most important one (line 17)
var y = person.getX; // It will return 9, because it will call global value of x(var x=9).

var myFunc = y.bind(person); // It will return 81, because it will call local value of x, which is defined in the object called person(x=81).

y(); // return 9 (the global variable);

myFunc();" // return 81 (the loacl variable);

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Source: stackoverflow.com

Tags: bind

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Contributed on Mar 03 2021

Mohamed Awde

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bind value to function javascript

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for (i = 0; i < 5; i++)
    (
        (x) => {
            console.log(x);
        }
    ).bind(null, i)() // 'i' has been bound

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Contributed on Mar 22 2023

AB_498

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JavaScript Function bind()

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-1

const person = {
  firstName:"John",
  lastName: "Doe",
  fullName: function () {
    return this.firstName + " " + this.lastName;
  }
}

const member = {
  firstName:"Hege",
  lastName: "Nilsen",
}

let fullName = person.fullName.bind(member);

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Source: Grepper

Tags: javascript j

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Contributed on May 23 2022

naly moslih

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What is the use of bind() in JavaScript?

Comment

var myButton = {
  content: 'OK',
  click() {
    console.log(this.content + ' clicked');
  }
};

myButton.click();

var looseClick = myButton.click;
looseClick(); // not bound, 'this' is not myButton - it is the globalThis

var boundClick = myButton.click.bind(myButton);
boundClick(); // bound, 'this' is myButton

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Source: stackoverflow.com

Tags: javascript j

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Contributed on Dec 19 2021

Rashad Almaqtary

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bind method in javascript

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let obj = {
    name: "Abhi",
    age: 28,
    info: function() {
        console.log(`${this.name}  is  ${this.age} year's old`);//template literals used here
    },
};
let obj1 = {
    name: "Vikash",
    age: 28,
};

obj.info.bind(obj1)(); //since bind methods return a new function so 
//we can directly call that function[()] without pollouting global
//space while assigning a varibale to call that function.
//Always try to make global space neat n clean ,
//dont polloute while assigning unnecessary variables.

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Contributed on Feb 09 2022

Brave Soul

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Javascript bind()

Comment

The bind() method returns a new function, and when invoked, it has its 'this' set to a specific value.

Syntax: functionName.bind(Object to borrow values from, ...argsN)

let runner = {
    name: 'Runner',
    run: function(speed) {
        console.log(this.name + ' runs at ' + speed + ' mph.');
    }
};

let flyer = {
    name: 'Flyer',
    fly: function(speed) {
        console.log(this.name + ' flies at ' + speed + ' mph.');
    }
};

// Uses values of 'flyer' instead of 'runner', 
// cause of the bind(), vice versa;
let run = runner.run.bind(flyer, 20);
run(); // logs "Flyer runs at 20 mph."

// With love @kouqhar

The bind() method allows an object to borrow a method from another object without making a copy of that method.

This is known as function borrowing in JavaScript.

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Source: www.javascripttutorial.net

Tags: javascript j

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Contributed on Apr 18 2023

kouqhar

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JavaScript Function bind()

Comment

		const person = {
name: "John Smith",
getNameAndAddress: function()
{
return this.name;
}

}
const personWithoutGet = {
name: "Jerry Smithers"}

 console.log(person.getName.bind(personWithoutGet);
  }

/*you can think of bind() apply()  and call() ALL as "stealing someone else's function to use."*/
/* victimBeingStolenFrom.functionName.call(theThief) */
/*notice the second variable personWithoutGet does not have a getName function*/

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Contributed on Jun 19 2022

Javasper

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bind() method

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var car = {
    registrationNumber: "FT5142",
    brand: "Benz",

    displayDetails: function(){
        console.log(this.registrationNumber+ " " + this.brand );
    }
}
car.displayDetails();


var myCarDetails = car.displayDetails.bind(car);
myCarDetails();

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Source: Grepper

Tags: javascript j

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Contributed on Jul 01 2022

Raymund Alum

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bind in javascript example

Comment

var persona = {
  nombre: 'Franco',
  apellido: 'Chequer',

  getNombre: function(){
    var nombreCompleto = this.nombre + ' ' + this.apellido;
    return nombreCompleto;
  }
}

var logNombre = function(){
  console.log(this.getNombre());
}

var logNombrePersona = logNombre.bind(persona);

logNombrePersona(); //'Franco'

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Source: students.soyhenry.com

Tags: bind

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Contributed on Apr 14 2022

Sleepy Scarab

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bind in javascript

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