fix(interpolation-binding): errors on undefined or null expression eval

aurelia · Jan 25, 2015 · 212a13d · 212a13d
1 parent 0cc84e8
commit 212a13d
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/binding-language.js b/src/binding-language.js
@@ -175,13 +175,14 @@ class InterpolationBinding {
         parts = this.parts,
         source = this.source,
         valueConverterLookupFunction = this.valueConverterLookupFunction,
-        i, ii;
+        i, ii, temp;
 
     for(i = 0, ii = parts.length; i < ii; ++i){
       if (i % 2 === 0) {
         value += parts[i];
       } else {
-        value += parts[i].evaluate(source, valueConverterLookupFunction).toString();
+        temp = parts[i].evaluate(source, valueConverterLookupFunction);
+        value += (temp ? temp.toString() : '');
       }
     }