SOURCE

var p1 = new Promise((res,rej)=>{
    console.log("into p1 promise");
    res("p1 res");
});


var p3 = new Promise((res,rej)=>{
    console.log("into p3 promise");
    res("p3 res");
});

p1.then(t=>{
    console.log(t);
    var p2 = new Promise((res,rej)=>{
    console.log("into p2 promise");
    res("p2 res");
});
    p2.then(t2=>{
        console.log(t2);
    });
});

const str = [{"a":"3"},{"a":"b"}];
for (let word of str){
    console.log(word);
}