add define.default

README.md

@@ -31,6 +31,20 @@ require('foo/bar/baz') // => 'hi';
 require('foo') === require('foo/bar/baz');
 ```
 
+
+
+### `define.default('old/path', 'new-name')`
+
+`define.default` is short-hand for `export { default } from 'foo';`
+
+```js
+define('foo', [], () => 'hi');
+define.default('foo', 'foo/bar/baz');
+
+require('foo/bar/baz') // => 'hi';
+require('foo') === require('foo/bar/baz');
+```
+
 ### `require('require')`
 
 When within a module, one can require `require`. This provides a `require` scoped to the current module. Enabling dynamic, relatively path requires.

lib/loader/loader.js

@@ -265,8 +265,9 @@ var loader, define, requireModule, require, requirejs;
   // we don't support all of AMD
   // define.amd = {};
 
-  function Alias(id) {
+  function Alias(id, prop) {
     this.id = id;
+    this.prop = prop;
   }
 
   define.alias = function(id, target) {
@@ -277,6 +278,16 @@ var loader, define, requireModule, require, requirejs;
     return new Alias(id);
   };
 
+  define.default = function(id, target) {
+    define(id, ['exports', target], function(exports, targetExports) {
+      Object.defineProperty(exports, 'default', {
+        get: function() {
+          return targetExports.default;
+        }
+      });
+    });
+  };
+
   function missingModule(id, referrer) {
     throw new Error('Could not find module `' + id + '` imported from `' + referrer + '`');
   }

tests/all.js

@@ -1260,6 +1260,43 @@ test('alias entries share same module instance', function() {
   });
 });
 
+test('define.default with default and other exports', function() {
+  var count = 0;
+  define.default('to', 'from');
+  define('from', ['exports'], function(exports) {
+    count++;
+
+    exports.default = 'YUP';
+    exports.other = 'NOPE';
+  });
+
+  equal(count, 0);
+  var result = require('to');
+  equal(count, 1);
+  equal(result.default, 'YUP');
+  deepEqual(require('from'), {
+    default: 'YUP',
+    other: 'NOPE',
+  });
+
+  equal(count, 1, 'second require should use existing instance');
+
+  var stats = statsForMonitor('loaderjs', tree);
+
+  deepEqual(stats, {
+    define: 2,
+    exports: 2,
+    findDeps: 2,
+    findModule: 3,
+    modules: 2,
+    pendingQueueLength: 2,
+    reify: 2,
+    require: 2,
+    resolve: 1,
+    resolveRelative: 0
+  });
+});
+
 test('alias with 2 arguments entries share same module instance', function() {
   var count = 0;
   define.alias('foo/index', 'bar');