Alternate proposal to handle falsy data, it seems like the core probl…

…em is that var couldn't handle the top level data object being undefined

.gitignore

@@ -1,5 +1,7 @@
 node_modules
 tests/*.json
+yarn-error.log
+yarn.lock
 
 # editor and IDE remnants
 *~

logic.js

@@ -128,7 +128,7 @@ http://ricostacruz.com/cheatsheets/umdjs.html
       }
       var sub_props = String(a).split(".");
       for(var i = 0; i < sub_props.length; i++) {
-        if(data === null) {
+        if(data === null || data === undefined) {
           return not_found;
         }
         // Descending into data
@@ -218,10 +218,6 @@ http://ricostacruz.com/cheatsheets/umdjs.html
       return logic;
     }
 
-    if (data === null || data === undefined) {
-      data = {};
-    }
-
     var op = jsonLogic.get_operator(logic);
     var values = logic[op];
     var i;

tests/tests.js

@@ -120,6 +120,12 @@ QUnit.test( "logging", function( assert ) {
 
 QUnit.test( "edge cases", function( assert ) {
   assert.equal( jsonLogic.apply(), undefined, "Called with no arguments" );
+
+  assert.equal( jsonLogic.apply({ var: "" }, 0), 0, "Var when data is 'falsy'" );
+  assert.equal( jsonLogic.apply({ var: "" }, null), null, "Var when data is null" );
+  assert.equal( jsonLogic.apply({ var: "" }, undefined), undefined, "Var when data is undefined" );
+
+  assert.equal( jsonLogic.apply({ var: ["a", "fallback"] }, undefined), "fallback", "Fallback works when data is a non-object" );
 });
 
 QUnit.test( "Expanding functionality with add_operator", function( assert) {