CSS select first-of-type amongst grandchildren?

问题:

I've read tricky questions such as Select first Descendant with CSS or How do I hide only the first element of a type? but mine doesn't match these ones.

I have this HTML structure:

<div class="parent">
    <div>
        <p class="interline"><!-- only this -->
        <p class="interline">
        <p class="interline">
    </div>
    <div>
        <p class="interline">
        <p class="interline">
        <p class="interline">
    </div>
</div>

And want to select only the first grandchild <p> under the .parent div.

How do I do that?

回答1:

You need to select the first div as well

.parent > div:first-of-type > p:first-of-type {
    color: red;
}

Demo

Here in the above selector, I am selecting the first p element nested inside the first div, which is further nested as direct child to an element having a class of .parent

> means select direct descendant to it's parent.

---

The above will fail in older versions of Internet Explorer, so if you are looking to support them as well, than equivalent supported selector will be

.parent > div:first-child > p:first-child {
    color: red;
}

Demo (Supports IE7 as well)

But using :first-child and :first-of-type has huge difference, say you are using p:first-child and you have some other element apart from p, your selector will fail, so that's why I provided you a solution of using :first-of-type

回答2:

.parent > div:first-child > p:first-child

Here you go, this should work for you

回答3:

It would be .parent p.interline:first-child or .parent .interline:first-child.