Morphdom Support for Template Elements

[nickarora]

I've reviewed past issues and was not able to find a clear answer.

For the given markup:

<template id="template-1">
  <p>One</p>
</template>

<template id="template-2">
  <p>Two</p>
</template>

And the following invocation of morphdom:

const template1 = document.querySelector("#template-1")

const template2 = document.querySelector("#template-2")

const morphed = morphdom(template1, template2)

the resulting morphed value is

<template id="template-2">
  <p>One</p>
</template>

The ID of the template was morphed but the children were not.

Is this an expected limitation? It is worth noting that when using the template element, the element's content is not rendered, only parsed into a document fragment. I am wondering if the fragment has a role to play in the observed behavior:

<template>
  #document-fragment
    <p>Some content</p>
</template>