e>window.m</code> is already defined (e.g. because you also use the main Mithril script), it will attach itself to the existing object. Otherwise it creates a new <code>window.m</code>. If you want to use streams in conjunction with Mithril as raw script tags, you should include Mithril in your page before <code>mithril/stream</code>, because <code>mithril</code> will otherwise overwrite the <code>window.m</code> object defined by <code>mithril/stream</code>. This is not a concern when the libraries are con