refactor($compile): always call attr.$observe

attr.$observe used to call function only if there was interpolation
on that attribute. We now call the observation function all the time
but we only save the reference to it if interpolation is present.

1 files changed, 8 insertions, 21 deletions

diff --git a/src/ng/directive/booleanAttrs.js b/src/ng/directive/booleanAttrs.js
index 1468008c..b0c1b78f 100644
--- a/src/ng/directive/booleanAttrs.js
+++ b/src/ng/directive/booleanAttrs.js
@@ -284,7 +284,6 @@ forEach(BOOLEAN_ATTR, function(propName, attrName) {
       priority: 100,
       compile: function() {
         return function(scope, element, attr) {
-          attr.$$observers[attrName] = [];
           scope.$watch(attr[normalized], function(value) {
             attr.$set(attrName, !!value);
           });
@@ -301,27 +300,15 @@ forEach(['src', 'href'], function(attrName) {
   ngAttributeAliasDirectives[normalized] = function() {
     return {
       priority: 99, // it needs to run after the attributes are interpolated
-      compile: function() {
-        return function(scope, element, attr) {
-          var value = attr[normalized];
-          if (value == undefined) {
-            // undefined value means that the directive is being interpolated
-            // so just register observer
-            attr.$$observers[attrName] = [];
-            attr.$observe(normalized, function(value) {
-              attr.$set(attrName, value);
+      link: function(scope, element, attr) {
+        attr.$observe(normalized, function(value) {
+          attr.$set(attrName, value);
 
-              // on IE, if "ng:src" directive declaration is used and "src" attribute doesn't exist
-              // then calling element.setAttribute('src', 'foo') doesn't do anything, so we need
-              // to set the property as well to achieve the desired effect
-              if (msie) element.prop(attrName, value);
-            });
-          } else {
-            // value present means that no interpolation, so copy to native attribute.
-            attr.$set(attrName, value);
-            element.prop(attrName, value);
-          }
-        };
+          // on IE, if "ng:src" directive declaration is used and "src" attribute doesn't exist
+          // then calling element.setAttribute('src', 'foo') doesn't do anything, so we need
+          // to set the property as well to achieve the desired effect
+          if (msie) element.prop(attrName, value);
+        });
       }
     };
   };