init

lib/knockout/src/binding/defaultBindings/submit.js

@@ -0,0 +1,19 @@
+ko.bindingHandlers['submit'] = {
+    'init': function (element, valueAccessor, allBindings, viewModel, bindingContext) {
+        if (typeof valueAccessor() != "function")
+            throw new Error("The value for a submit binding must be a function");
+        ko.utils.registerEventHandler(element, "submit", function (event) {
+            var handlerReturnValue;
+            var value = valueAccessor();
+            try { handlerReturnValue = value.call(bindingContext['$data'], element); }
+            finally {
+                if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
+                    if (event.preventDefault)
+                        event.preventDefault();
+                    else
+                        event.returnValue = false;
+                }
+            }
+        });
+    }
+};