fix falsy __useDefault check

guybedford · guybedford · commit 31de1f5faf34 · 2017-08-09T11:38:59.000+02:00
diff --git a/core/register-loader.js b/core/register-loader.js
@@ -537,7 +537,7 @@ function makeDynamicRequire (loader, key, dependencies, dependencyInstantiations
         else
           module = ensureEvaluate(loader, depLoad, depLoad.linkRecord, registry, state, seen);
 
-        return module.__useDefault || module;
+        return '__useDefault' in module ? module.__useDefault : module;
       }
     }
     throw new Error('Module ' + name + ' not declared as a System.registerDynamic dependency of ' + key);

Original file line number	Diff line number	Diff line change
`@@ -537,7 +537,7 @@ function makeDynamicRequire (loader, key, dependencies, dependencyInstantiations`
`537`	`537`	`else`
`538`	`538`	`module = ensureEvaluate(loader, depLoad, depLoad.linkRecord, registry, state, seen);`
`539`	`539`
`540`		`- return module.__useDefault \|\| module;`
	`540`	`+ return '__useDefault' in module ? module.__useDefault : module;`
`541`	`541`	`}`
`542`	`542`	`}`
`543`	`543`	`throw new Error('Module ' + name + ' not declared as a System.registerDynamic dependency of ' + key);`