Fix issue when mutation observers aren't supported

mmariano · scottgonzalez · commit d928d4436e37 · 2015-09-24T14:37:05.000-04:00
Fixes gh-204 Closes gh-206
diff --git a/src/installer.js b/src/installer.js
@@ -40,7 +40,7 @@ Installer.prototype = {
     // a removal without an insertion when a node is redistributed among
     // shadows. Since it all ends up correct in the document, watching only
     // the document will yield the correct mutations to watch.
-    if (targeting.canTarget(target)) {
+    if (this.observer && targeting.canTarget(target)) {
       this.observer.observe(target, OBSERVER_INIT);
     }
   },

Original file line number	Diff line number	Diff line change
`@@ -40,7 +40,7 @@ Installer.prototype = {`
`40`	`40`	`// a removal without an insertion when a node is redistributed among`
`41`	`41`	`// shadows. Since it all ends up correct in the document, watching only`
`42`	`42`	`// the document will yield the correct mutations to watch.`
`43`		`- if (targeting.canTarget(target)) {`
	`43`	`+ if (this.observer && targeting.canTarget(target)) {`
`44`	`44`	`this.observer.observe(target, OBSERVER_INIT);`
`45`	`45`	`}`
`46`	`46`	`},`