I have read a few articles regarding callback function. I understand how they presented like add a + b then give callback function. But I am doing same. I first declared the function then call it again I call the callback function, why it is not working in my case?
function me(callback){
console.log("1")
}
me(function(){
console.log(2)
})I am expecting console.log 1 then console.log 2. I am getting only console.log 1
you are calling the callback function, it won't trigger automatically, that approach is so you can notify something using that callback function when your function ended something.
function me(callback) {
console.log("1")
// your process ended, lets notify
callback();
}
me(function() {
console.log(2)
})You have to actually call the callback function inside the function it is passed to as argument:
function me(callback){
console.log(1)
callback();
}
me(function(){
console.log(2);
})
callback().