Question

How do i write this selector in plain javascript

$(this).parent('p')

Answer 1

Since the jQuery .parent(selector) function only checks the immediate parent, you can create a function like this:

function getParent(o, tag) {
    if (o.parentNode.tagName.toLowerCase() == tag.toLowerCase()) {
        return(o.parentNode);
    } else {
        return(null);
    }
}

Then, you can just call this:

getParent(this, 'p');

---

Or, if you want it to return an array similar to how jQuery does it, you would use this:

function getParent(o, tag) {
    var results = [];
    if (o.parentNode.tagName.toLowerCase() == tag.toLowerCase()) {
        results.push(o.parentNode);
    }
    return(results);
}

Then, you can just call this (and get an array back):

getParent(this, 'p');

---

If you wanted the equivalent of the jQuery .parents(selector) function that returns all ancestors that match a tag type, you would use this:

function getParents(o, tag) {
    var results = [];
    while ((o = o.parentNode) && o.tagName) {
        if (o.tagName.toLowerCase() == tag.toLowerCase()) {
            results.push(o);
        }
    }
    return(results);
}

And, you would call it like this:

getParents(this, 'p');