Promises in JavaScript

 Create Promise

let myPromise = new Promise(function(resolve, reject) {

Condition

let success = true;

If Condition

if (success) {

    resolve("Task Completed");

}

Else Condition

else {

    reject("Task Failed");

}

Handle Success

.then(function(result) {

    console.log(result);

})

Handle Error

.catch(function(error) {

    console.log(error);

});

Full Code :

let myPromise = new Promise(function(resolve, reject) {

    let success = true;

    if (success) {

        resolve("Task Completed");

    } else {

        reject("Task Failed");

    }

});

myPromise

.then(function(result) {

    console.log(result);

})

.catch(function(error) {

    console.log(error);

});

⚡ Flow Summary

Promise created
     ↓
Check condition (success)
     ↓
If true → resolve() → then()
If false → reject() → catch()

🎯 Real-life Example

You ordered food 🍔


If delivered → 
If delivered → resolve("Food arrived")


If not → 
If not → reject("Delivery failed")