How to recursively search all parentNodes

Question

I want to know, how to find out recursively all parent nodes of an element. Suppose i have following snippet

Hello

Answer 1

Here's a shorter one:

function parentByTag(el, tag) {
    if(!el || el.tagName == tag) {
        return el
    } else {
        return parentByTag(el.parentElement, tag)
    }
}

Returns undefined if not found.