When the cursor [I] is as below,
<span> This is[I] a content. </span>
you type ⌘->, and the selection [~~] is as below.
<span>[ This is a content. ]</span>
It analyzes hierarchical structure and finds immediate parent tags.
So,
<div>
<span> This is a content in span. </span>
This is[I] a content in div.
<span> This is a content in span. </span>
</div>
results in
<div>[
<span> This is a content in span. </span>
This is a content in div.
<span> This is a content in span. </span>
]</div>
apm install select-text-between-tags