JS: Fix typo and add metadata to DomValueRefs

Author: asger-semmle

javascript/ql/src/meta/analysis-quality/DomValueRefs.ql

@@ -0,0 +1,14 @@
+/**
+ * @name DOM value references
+ * @description The number of references to a DOM value.
+ * @kind metric
+ * @metricType project
+ * @metricAggregate sum
+ * @tags meta
+ * @id js/meta/dom-value-refs
+ */
+
+import javascript
+import CallGraphQuality
+
+select projectRoot(), count(DOM::domValueRef())