I'm trying to make this work, what am I doing wrong?
I want to be able to do some stuff when function one is completed.
function one() {
// do stuff
}
function main() {
//script
//script
one(function() {
// do some stuff when "one" is completed
console.log("one is completed");
});
}
Why this doest fire a callback? (no log entry in the console)
You need to pass the callback as an argument and call it like normal function
function one(a, b, fn) {
// do staff
if (fn) {
fn()
}
}
function main() {
//script
//script
one(5, 6, function() {
// do some stuff when "one" is completed
console.log("one is completed");
}
}
Cause one does not expect a callback, therefore it will be ignored and never called back.
function one(callback) { // <- take a callback
callback(); // <- call back the callback "callback"
}
You need to pass the callback function inside the one() function. Then you need to call that function:
const one = (cb) => {
console.log('in one()');
cb();
}
const main = () => {
one(() => {
console.log('one() is completed');
});
}
main();
OUTPUT:
in one()
one() is completed
