Add patchBetween()

[justinfagnani]

This adds a patchBetween(startNode, endNode, template, data) function that can run a patch function in between two nodes.

[iteriani]

It should be possible to have unvisited dom but currentNode.nextSibling === endNode.

{template a}

{if $a}

{else} {/if}

[justinfagnani]

Can you expand on that a bit? What would the unvisited DOM be? What are the idom opcode that produce it?

[iteriani]

It should be

function fn(a:boolean) {
elementOpen('div', 1);
elementClose();
if (a) {
elementOpen('div', 2);
elementClose();
} else {
elementOpen('div', 3);
elementClose();
}
elementOpen('div', 4);
elementClose();
}

In the first route (A), you'd have

if you flip a to false, you'd first have, I think, the following behavior

<-- insert

then the jump to 4

<-- insert

<--

and then never deleting [key=2]