javascript promise resolve rejectr code example

Example 1: making promises in js

getData()
    .then(data => console.log(data))
    .catch(error => console.log(error));

Example 2: return new Promise(res => {

// the execution: catch -> then
new Promise((resolve, reject) => {

  throw new Error("Whoops!");

}).catch(function(error) {

  alert("The error is handled, continue normally");

}).then(() => alert("Next successful handler runs"));