JavaScript Callback Hell with Promises [duplicate] callback hell with promises,callback hell in javascript,callback hell

This question already has answers here:
Answer:1

You can use Promise.all to wait for multiple promises :

your pseudo code becomes :

var pa = new Promise(function(){/*function A*/});
var pb = new Promise(function(){
    pa.then(function {/*function B*/}
});
Promise.all([pa, pb]).then(function(){/*function C*/});
Answer:2

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