javascript what is callback function code example
Example 1: javascript callback
function greeting(name) {
alert('Hello ' + name);
}
function processUserInput(callback) {
var name = prompt('Please enter your name.');
callback(name);
}
processUserInput(greeting);
Example 2: what are callback functions
funct printANumber(int number, funct callbackFunction) {
printout("The number you provided is: " + number);
}
funct printFinishMessage() {
printout("I have finished printing numbers.");
}
funct event() {
printANumber(6, printFinishMessage);
}
Example 3: callback function
function createQuote(quote, callback){
var myQuote = "Like I always say, " + quote;
callback(myQuote);
}
function logQuote(quote){
console.log(quote);
}
createQuote("eat your vegetables!", logQuote);
Example 4: javascript callback function
const message = function() {
console.log("This message is shown after 3 seconds");
}
setTimeout(message, 3000);
Example 5: callback function
const ironMan = withGloves(withBoots(withArmor(withHelmet(TonyStark))));