how to run statements after subscribe is cycle is over in angular\ code example

Example 1: update all series at once in highcahrts

chart.series[0].update({
    pointStart: newSeries[0].pointStart,
    data: newSeries[0].data
}, true); //true / false to redraw

Example 2: How to make a function run only after 2 events has triggered js

const promise1 = Promise.resolve(3);
const promise2 = 42;
const promise3 = new Promise(function(resolve, reject) {
  setTimeout(resolve, 100, 'foo');
});

Promise.all([promise1, promise2, promise3]).then(function(values) {
  console.log(values);
});
// expected output: Array [3, 42, "foo"]