JAVASCRIPT

promise

new Promise( (res, rej) => {
  setTimeout(() => res(1), 1000);
}).then( (res) => {
  console.log(res); // 1
  return res*2
}).then( (res) => {
  console.log(res); // 2
});

Promises ex.

console.log('some piece of code');
examplePromise.then(function(result){
  console.log(result);
}).catch(function (error) {
  console.error(error);
});
console.log('another piece of code');

promise

const myPromise = new Promise((resolve, reject) => {  
    let condition;  
    
    if(condition is met) {    
        resolve('Promise is resolved successfully.');  
    } else {    
        reject('Promise is rejected');  
    }
});

Promise

let doSecond = () => {
  console.log('Do second.')
}

let doFirst = new Promise((resolve, reject) => {
  setTimeout(() => {
    console.log('Do first.')

    resolve()
  }, 500)
})

doFirst.then(doSecond)

promise

conts trypromises= new Promise((resolve,reject)=>{
	reject()	
  resolve()
});

trypromises.then((data)=>{
	console.log(data)
}).then()

----------------------------------
const proses=(aa)=>{
	return new Promise((resolve,reject)=>{
      	reject()
    	resolve()
    })
};

promise

<script>
    var promise = Promise.resolve(17468);
 
promise.then(function(val) {
    console.log(val);
});
//Output: 17468
</script>

promise

<script>
    var promise = Promise.resolve(17468);
 
promise.then(function(val) {
    console.log(val);
});
//Output: 17468
</script>