fixed length

src/lib/js/value.rs

@@ -159,11 +159,12 @@ impl ValueData {
     /// Resolve the property in the object
     /// Returns a copy of the Property
     pub fn get_prop(&self, field: String) -> Option<Property> {
-        // handle length
         // Spidermonkey has its own GetLengthProperty: https://searchfox.org/mozilla-central/source/js/src/vm/Interpreter-inl.h#154
-        // TODO: Maybe we need a GetLengthProperty for value types
-        if let ValueData::String(ref s) = *self {
-            return Some(Property::new(to_value(s.len() as f64)))
+        // TODO: Move this to a better place
+        if self.is_string() && field == "length" {
+            if let ValueData::String(ref s) = *self {
+                return Some(Property::new(to_value(s.len() as f64)))
+            }
         }
 
         let obj: ObjectData = match *self {

tests/js/test.js

@@ -1,2 +1,4 @@
-var a =  'jabra888';
+var a =  'jabrjjja888';
+a.length;
+a = "jase";
 a.length;