feat($compile): added new method strictComponentBindingsEnabled

Author: ZitaNemeckova

docs/content/error/$compile/missingattr.ngdoc

@@ -0,0 +1,6 @@
+@ngdoc error
+@name $compile:missingattr
+@fullName Missing required attribute
+@description
+
+This error may occur only when `$compileProvider.strictComponentBindingsEnabled` is set to `true`.han all attributes without `?` must be set. If one or more aren't set than first one will throw an error.

src/ng/compile.js

@@ -1403,6 +1403,32 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
     return debugInfoEnabled;
   };
 
+  /**
+   * @ngdoc method
+   * @name  $compileProvider#strictComponentBindingsEnabled
+   *
+   * @param {boolean=} enabled update the strictComponentBindingsEnabled state if provided, otherwise just return the
+   * current strictComponentBindingsEnabled state
+   * @returns {*} current value if used as getter or itself (chaining) if used as setter
+   *
+   * @kind function
+   *
+   * @description
+   * Call this method to enable/disable strict component bindings check. If enabled, the compiler will enforce that
+   * for all bindings of a component that are not set as optional with `?`, an attribute needs to be provided
+   * on the component's HTML tag.
+   *
+   * The default value is false.
+   */
+  var strictComponentBindingsEnabled = false;
+  this.strictComponentBindingsEnabled = function(enabled) {
+    if (isDefined(enabled)) {
+      strictComponentBindingsEnabled = enabled;
+      return this;
+    }
+    return strictComponentBindingsEnabled;
+  };
+
   var TTL = 10;
   /**
    * @ngdoc method
@@ -3430,7 +3456,13 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
 
           case '@':
             if (!optional && !hasOwnProperty.call(attrs, attrName)) {
-              destination[scopeName] = attrs[attrName] = undefined;
+              if (strictComponentBindingsEnabled) {
+                throw $compileMinErr('missingattr',
+                  'Attribute \'{0}\' of \'{1}\' is non-optional and must be set!',
+                  attrName, directive.name);
+              } else {
+                destination[scopeName] = attrs[attrName] = undefined;
+              }
             }
             removeWatch = attrs.$observe(attrName, function(value) {
               if (isString(value) || isBoolean(value)) {
@@ -3457,7 +3489,13 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
           case '=':
             if (!hasOwnProperty.call(attrs, attrName)) {
               if (optional) break;
-              attrs[attrName] = undefined;
+              if (strictComponentBindingsEnabled) {
+                throw $compileMinErr('missingattr',
+                  'Attribute \'{0}\' of \'{1}\' is non-optional and must be set!',
+                  attrName, directive.name);
+              } else {
+                attrs[attrName] = undefined;
+              }
             }
             if (optional && !attrs[attrName]) break;
 
@@ -3501,7 +3539,13 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
           case '<':
             if (!hasOwnProperty.call(attrs, attrName)) {
               if (optional) break;
-              attrs[attrName] = undefined;
+              if (strictComponentBindingsEnabled) {
+                throw $compileMinErr('missingattr',
+                  'Attribute \'{0}\' of \'{1}\' is non-optional and must be set!',
+                  attrName, directive.name);
+              } else {
+                attrs[attrName] = undefined;
+              }
             }
             if (optional && !attrs[attrName]) break;
 
@@ -3526,6 +3570,11 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
             break;
 
           case '&':
+            if (!hasOwnProperty.call(attrs, attrName) && !optional && strictComponentBindingsEnabled) {
+              throw $compileMinErr('missingattr',
+                'Attribute \'{0}\' of \'{1}\' is non-optional and must be set!',
+                attrName, directive.name);
+            }
             // Don't assign Object.prototype method to scope
             parentGet = attrs.hasOwnProperty(attrName) ? $parse(attrs[attrName]) : noop;