From 0ab906bc61ecc6a7d09a9dbf8cff8d83cfb7fa55 Mon Sep 17 00:00:00 2001
From: Naina Raisinghani <nainar@google.com>
Date: Thu, 3 Aug 2017 17:38:16 +0200
Subject: [PATCH] Add description for CSSURLImageValue constructor.

---
 css-typed-om/Overview.bs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/css-typed-om/Overview.bs b/css-typed-om/Overview.bs
index 429bd190..9e1d38b1 100644
--- a/css-typed-om/Overview.bs
+++ b/css-typed-om/Overview.bs
@@ -2220,6 +2220,19 @@ Issue: Does the loading lifecycle need to be described here?
 {{CSSURLImageValue}} objects represent {{CSSImageValue}}s that match the <<url>> production. For these
 objects, the {{CSSURLImageValue/url}} attribute contains the URL that references the image.
 
+<div algorithm>
+    The <dfn constructor for=CSSURLImageValue>CSSURLImageValue(|url|)</dfn> constructor must,
+    when called,
+    perform the following steps:
+
+    1. If the |url| passed into the constructor doesn't correctly 
+        parse as a <<url>>, throw a {{TypeError}} and exit this algorithm.
+    2. Else, return a new {{CSSURLImageValue}}
+        with its {{CSSURLImageValue/url}} internal slot
+        set to |url|.
+</div>
+
+
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