Support key for memoization about reef

[duhdugg]

something like this?

diff --git a/src/components/render.js b/src/components/render.js
index 265b265..8bedce1 100755
--- a/src/components/render.js
+++ b/src/components/render.js
@@ -212,6 +212,7 @@ function isDifferentNode (node1, node2) {
 		(typeof node1.nodeType === 'number' && node1.nodeType !== node2.nodeType) ||
 		(typeof node1.tagName === 'string' && node1.tagName !== node2.tagName) ||
 		(typeof node1.id === 'string' && node1.id !== node2.id) ||
+		(node1.getAttribute?.call(node1, 'key') !== node2.getAttribute?.call(node2, 'key')) ||
 		(typeof node1.src === 'string' && node1.src !== node2.src)
 	);
 }

[cferdinandi]

@duhdugg yea, though I don't think you need to the optional chaining operator/call() method on that one. I think you can just test it outright since strings and such don't generally make it to the test. I could be wrong.

[duhdugg]

I'm having a little trouble following everything that might be passed to it, but I think you're right. The biggest user of this function is the diff function, which is used by render. There is a possibility that the wrong elem argument is provided to render, but this already causes an uncaught exception earlier in the diff function as it tries to access the childNodes property on a null value.

I'll submit a PR with no optional chaining.