title: Using MSAL.js in SPA for Azure B2C Authentication - Pop up window an issue?
body: <p>So I was thinking of using MSAL for authentication against the AZURE B2C Identity Provider, but from what I can see by looking at the code, MSAL is dependent on pop up windows for logins. (Please correct me if I'm wrong).</p>
  
  <p>My question is, given that B2C sites are consumer facing, isn't the use of pop up windows highly discouraged, given that many of your potential site users may have pop up disabled? I'm having difficulty finding a good example of how to plug Azure B2C into an angular2 app without pop up windows.</p>