callback in javascript

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CodePadding answered on May 27, 2020 Popularity 10/10 Helpfulness 2/10

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callback in javascript

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-1

function sum(num1,num2,callback){
    let total = num1 + num2
    callback(total)
}

sum(10,20,function(total){
    // received total here
    console.log(total);
})

sum(5,16,(total)=>{
    console.log(total);
})

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Tags: callback javascript

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Contributed on Mar 06 2022

CodePadding

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javascript callback

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146

/*
A callback function is a function passed into another function
as an argument, which is then invoked inside the outer function
to complete some kind of routine or action. 
*/
function greeting(name) {
  alert('Hello ' + name);
}

function processUserInput(callback) {
  var name = prompt('Please enter your name.');
  callback(name);
}

processUserInput(greeting);
// The above example is a synchronous callback, as it is executed immediately.

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Source: Grepper

Tags: callback callbac

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Contributed on Mar 05 2021

Mehedi Islam Ripon

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callback function js

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function greeting(name) {
  alert('Hello ' + name);
}

function processUserInput(callback) {
  var name = prompt('Please enter your name.');
  callback(name);
}

processUserInput(greeting);

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Source: developer.mozilla.org

Tags: javascript j

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Contributed on May 27 2020

0 Answers Avg Quality 2/10

What is callback in js

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// What is callback functions in js

// Lets make a function

// Putting parameter in it "callback"
function func1(callback) {
  console.log(callback); // Log 'callback'; And now our parameter callback is a function and we can call it from our func1 and this is what callback is
  hello();
}

// Making one more function to print hello world in console
function hello() {
  console.log("Hello world");
}

func1(hello); // Call func and give hello function as a arguement; Yes we can give function as arguement

// func1(hello()); // This is wrong way to give function as arguement

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Contributed on Aug 09 2022

Fahad Shaikh

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callback in js

Comment

function greeting(name) {
  alert('Hello ' + name);
}

function processUserInput(callback , {
  var name = prompt('Please enter your name.');
  callback(name);
}}

processUserInput(greeting);

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Source: Grepper

Tags: callback callbac

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Contributed on Oct 19 2020

Nerdy Girl

0 Answers Avg Quality 2/10

what is the callback function in javascript

Comment

// A callback function is a function that is passed as an argument to another function 
// and is expected to be called back (executed) at a certain point within the containing function.
// It allows you to define an action to be taken after a certain task or event has been completed.

// Example of a callback function
function sayHello(name, callback) {
  console.log('Hello, ' + name);
  callback();
}

function sayGoodbye() {
  console.log('Goodbye!');
}

sayHello('John', sayGoodbye);

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Contributed on Sep 11 2023

YOU.com

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callback function js

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// A function that accepts a callback function as an argument
function performTask(callback) {
  // Simulating an asynchronous task
  setTimeout(function() {
    // Perform some task
    console.log('Task completed');

    // Execute the callback function
    callback();
  }, 2000);
}

// Define the callback function
function afterTaskCompletion() {
  console.log('Callback function executed');
}

// Call the performTask() function and pass the callback
performTask(afterTaskCompletion);

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Contributed on Sep 11 2023

YOU.com

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callback in js

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// Example using callback in JavaScript
function greetUser(name, callback) {
  console.log("Hello, " + name);
  callback();
}

function finishGreeting() {
  console.log("Greeting finished.");
}

// Usage
greetUser("John", finishGreeting);

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Contributed on Sep 11 2023

YOU.com

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callback js

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const orderCoffee = callback => {
    let coffee = null;
    console.log("Sedang membuat kopi, silakan tunggu...");
    setTimeout(() => {
        coffee = "Kopi sudah jadi!";
        callback(coffee);
    }, 3000);
}
 
 
orderCoffee(coffee => {
    console.log(coffee);
});
 
 
/* output
Sedang membuat kopi, silakan tunggu...
---- setelah 3 detik ----
Kopi sudah jadi!
*/

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Source: www.dicoding.com

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Contributed on Mar 04 2023

Hammam Alfarisy

0 Answers Avg Quality 2/10

callback function javascript

Comment

function processData(data, callback) {
    // Perform some processing on the data
    let processedData = data.toUpperCase();
  
    // Call the callback function and pass the processed data
    callback(processedData);
}

function displayData(data) {
    console.log(data);
}

// Calling the processData function with the displayData function as a callback
processData("hello world", displayData);

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Contributed on Sep 12 2023

YOU.com

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callback in javascript

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