diff --git a/js/id/svg/surface.js b/js/id/svg/surface.js
index 44f8a9866..3dde953bc 100644
--- a/js/id/svg/surface.js
+++ b/js/id/svg/surface.js
@@ -1,14 +1,19 @@
iD.svg.Surface = function() {
function findStylesheet(name) {
return _.find(document.styleSheets, function(stylesheet) {
- return stylesheet.href.indexOf(name) > 0;
+ return stylesheet.href && stylesheet.href.indexOf(name) > 0;
});
}
function sprites(stylesheetName, selectorRegexp) {
var sprites = [];
- _.forEach(findStylesheet(stylesheetName).cssRules, function(rule) {
+ var stylesheet = findStylesheet(stylesheetName);
+ if (!stylesheet) {
+ return sprites;
+ }
+
+ _.forEach(stylesheet.cssRules, function(rule) {
var klass = rule.selectorText,
match = klass && klass.match(selectorRegexp);
if (match) {
diff --git a/test/index.html b/test/index.html
index a58130b27..6405d8280 100644
--- a/test/index.html
+++ b/test/index.html
@@ -4,8 +4,6 @@
Mocha Tests
-
-
@@ -25,7 +23,6 @@
-
diff --git a/test/index_packaged.html b/test/index_packaged.html
index 29a17a4f6..24df9f978 100644
--- a/test/index_packaged.html
+++ b/test/index_packaged.html
@@ -4,8 +4,6 @@
Mocha Tests
-
-
@@ -23,7 +21,6 @@
-