Pseudo code showing how to open a popup "assinchronously" without being blocked by the browsers

async-popup.js

// The idea is to load a placeholder popup right after the click
// and then redirect it later to the real location.

// on click
let popup = showPlaceholderPopup('Loading...');
api.get('/obtain-the-real-url').then(url => {
    popup.location.href = url;
});