When using tmi.js inside an Angular application, the TMI client is checking for global, which was removed from Angular. Angular uses window.

client.js line 7
var ws = global.WebSocket || global.MozWebSocket || require("ws");

I fix this in my index.html with

<script>
    if(window['global'] === undefined){ window['global'] = window }
</script>

but can easily be fixed with var global = global || window; before initializing ws on line 7.

Server configuration

• Operating system: Windows 10
• Node version (if applicable): 10.16.3
• NPM version (if applicable): 6.13.0
• tmi.js version: 1.5.0