From 0b30c4c7b4c5b81d8f94a05b3c4ae4a43e9fab3b Mon Sep 17 00:00:00 2001
From: Dominic Farolino <domfarolino@gmail.com>
Date: Wed, 6 Dec 2023 11:40:10 -0500
Subject: [PATCH] Spec the `Observable` constructor

---
 spec.bs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/spec.bs b/spec.bs
index 80891aa..0970b7a 100644
--- a/spec.bs
+++ b/spec.bs
@@ -220,6 +220,21 @@ interface Observable {
 };
 </xmp>
 
+Each {{Observable}} has a <dfn for=Observable>subscribe callback</dfn>, which is a
+{{SubscribeCallback}}.
+
+Issue: Make [=Observable/subscribe callback=] either a {{SubscribeCallback}} or a set of steps that
+can be passed in by natively-constructed {{Observable}}s.
+
+<div algorithm>
+  The <dfn for=Observable constructor lt="Observable(callback)"><code>new
+  Observable(|callback|)</code></dfn> constructor steps are:
+
+    1. Set [=this=]'s [=Observable/subscribe callback=] to |callback|.
+
+      Note: This callback will get invoked later when {{Observable/subscribe()}} is called.
+</div>
+
 <h3 id=operators>Operators</h3>
 
 For now, see [https://github.com/wicg/observable#operators](https://github.com/wicg/observable#operators).