Promises - More About

    // ES6 Promises - More syntax and examples
    // calling resolve directly
    // calling reject directly
    // 
    
    let p1 = new Promise((resolve, reject)=>{
        if(true){
            resolve('p1 resolved');
        }else{
            reject('p1 rejected');
        }
    });
    
    let p2 = Promise.resolve('p2 resolved');        // similar to p1 above
    let p3 = () => Promise.resolve(null);           // returns Promise to a function
    let p4 = () => Promise.reject('p4 rejected');   // returns Promise to a function
    
    
    p1.then((result)=>{
        console.log('p1:', result);
    })

    p2.then((result)=>{
        console.log('p2:', result);
    });
    
    p3().then((result)=>{
        console.log('p3:', result);
    })

    p4().then((result)=>{
        console.log('Not resolved');
    }).catch((result)=>{
        console.log('p4 reject: ', result);
    })