fix(patchProperty): return null as the default value (#413)

jahtalab · mhevery · commit 396942ba6b84 · 2016-08-22T09:41:34.000-07:00
Closes #319
diff --git a/lib/common/utils.ts b/lib/common/utils.ts
@@ -82,8 +82,9 @@ export function patchProperty(obj, prop) {
     }
   };
 
+  // The getter would return undefined for unassigned properties but the default value of an unassigned property is null
   desc.get = function () {
-    return this[_prop];
+    return this[_prop] || null;
   };
 
   Object.defineProperty(obj, prop, desc);

Original file line number	Diff line number	Diff line change
`@@ -82,8 +82,9 @@ export function patchProperty(obj, prop) {`
`82`	`82`	`}`
`83`	`83`	`};`
`84`	`84`
	`85`	`+ // The getter would return undefined for unassigned properties but the default value of an unassigned property is null`
`85`	`86`	`desc.get = function () {`
`86`		`- return this[_prop];`
	`87`	`+ return this[_prop] \|\| null;`
`87`	`88`	`};`
`88`	`89`
`89`	`90`	`Object.defineProperty(obj, prop, desc);`