diff --git a/src/ecmascript/spidermonkey/element.c b/src/ecmascript/spidermonkey/element.c
index 4c463cf5..8517807c 100644
--- a/src/ecmascript/spidermonkey/element.c
+++ b/src/ecmascript/spidermonkey/element.c
@@ -57,6 +57,7 @@ static bool element_get_property_className(JSContext *ctx, unsigned int argc, JS
static bool element_set_property_className(JSContext *ctx, unsigned int argc, JS::Value *vp);
static bool element_get_property_dir(JSContext *ctx, unsigned int argc, JS::Value *vp);
static bool element_set_property_dir(JSContext *ctx, unsigned int argc, JS::Value *vp);
+static bool element_get_property_firstChild(JSContext *ctx, unsigned int argc, JS::Value *vp);
static bool element_get_property_id(JSContext *ctx, unsigned int argc, JS::Value *vp);
static bool element_set_property_id(JSContext *ctx, unsigned int argc, JS::Value *vp);
static bool element_get_property_innerHtml(JSContext *ctx, unsigned int argc, JS::Value *vp);
@@ -87,6 +88,7 @@ JSPropertySpec element_props[] = {
JS_PSG("childElementCount", element_get_property_childElementCount, JSPROP_ENUMERATE),
JS_PSGS("className", element_get_property_className, element_set_property_className, JSPROP_ENUMERATE),
JS_PSGS("dir", element_get_property_dir, element_set_property_dir, JSPROP_ENUMERATE),
+ JS_PSG("firstChild", element_get_property_firstChild, JSPROP_ENUMERATE),
JS_PSGS("id", element_get_property_id, element_set_property_id, JSPROP_ENUMERATE),
JS_PSGS("innerHTML", element_get_property_innerHtml, element_set_property_innerHtml, JSPROP_ENUMERATE),
JS_PSGS("lang", element_get_property_lang, element_set_property_lang, JSPROP_ENUMERATE),
@@ -218,6 +220,52 @@ element_get_property_dir(JSContext *ctx, unsigned int argc, JS::Value *vp)
return true;
}
+static bool
+element_get_property_firstChild(JSContext *ctx, unsigned int argc, JS::Value *vp)
+{
+ JS::CallArgs args = CallArgsFromVp(argc, vp);
+ JS::RootedObject hobj(ctx, &args.thisv().toObject());
+
+ struct view_state *vs;
+ JSCompartment *comp = js::GetContextCompartment(ctx);
+
+ if (!comp) {
+ return false;
+ }
+
+ struct ecmascript_interpreter *interpreter = JS_GetCompartmentPrivate(comp);
+
+ /* This can be called if @obj if not itself an instance of the
+ * appropriate class but has one in its prototype chain. Fail
+ * such calls. */
+ if (!JS_InstanceOf(ctx, hobj, &element_class, NULL))
+ return false;
+
+ vs = interpreter->vs;
+ if (!vs) {
+ return false;
+ }
+
+ xmlpp::Element *el = JS_GetPrivate(hobj);
+
+ if (!el) {
+ args.rval().setNull();
+ return true;
+ }
+
+ auto node = el->get_first_child();
+
+ if (!node) {
+ args.rval().setNull();
+ return true;
+ }
+
+ JSObject *elem = getElement(ctx, node);
+ args.rval().setObject(*elem);
+
+ return true;
+}
+
static bool
element_get_property_id(JSContext *ctx, unsigned int argc, JS::Value *vp)
{
diff --git a/test/ecmascript/firstChild.html b/test/ecmascript/firstChild.html
new file mode 100644
index 00000000..93a9aa4c
--- /dev/null
+++ b/test/ecmascript/firstChild.html
@@ -0,0 +1,16 @@
+
+
+BBB
+bbb
+AAAUUUAAAAAAA
+
+BB
+
+
+
+