fix(domFns): Fix "cannot read property 'call' of undefined"

STRML · STRML · commit 176f69122b0b · 2017-11-27T14:16:01.000-06:00
Fixes react-grid-layout#300, react-grid-layout#303
diff --git a/lib/utils/domFns.js b/lib/utils/domFns.js
@@ -19,8 +19,12 @@ export function matchesSelector(el: Node, selector: string): boolean {
     });
   }
 
+  // Might not be found entirely (not an Element?) - in that case, bail
   // $FlowIgnore: Doesn't think elements are indexable
-  return el[matchesSelectorFunc].call(el, selector);
+  if (!isFunction(el[matchesSelectorFunc])) return false;
+
+  // $FlowIgnore: Doesn't think elements are indexable
+  return el[matchesSelectorFunc](selector);
 }
 
 // Works up the tree to the draggable itself attempting to match selector.

Original file line number	Diff line number	Diff line change
`@@ -19,8 +19,12 @@ export function matchesSelector(el: Node, selector: string): boolean {`
`19`	`19`	`});`
`20`	`20`	`}`
`21`	`21`
	`22`	`+ // Might not be found entirely (not an Element?) - in that case, bail`
`22`	`23`	`// $FlowIgnore: Doesn't think elements are indexable`
`23`		`- return el[matchesSelectorFunc].call(el, selector);`
	`24`	`+ if (!isFunction(el[matchesSelectorFunc])) return false;`
	`25`	`+`
	`26`	`+ // $FlowIgnore: Doesn't think elements are indexable`
	`27`	`+ return el[matchesSelectorFunc](selector);`
`24`	`28`	`}`
`25`	`29`
`26`	`30`	`// Works up the tree to the draggable itself attempting to match selector.`