css - Question about tracking down the use of ::marker

Question

It is my understanding that any CSS selector with ::name is a pseudo-class and needs to be used as part of a tag selector, ex. li::marker. I have recently run into some code that has ::marker outside the tag.

Here is how it shows in Page View

<li id="menu-item-435" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-435"><a href="https://URL/">Latest Post</a></li>

Here is how it shows in the Firefox Inspector

<li id="menu-item-435" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-435">::marker<a href="https://URL/">Latest Post</a></li>

What is the difference?

question from:https://stackoverflow.com/questions/65912835/question-about-tracking-down-the-use-of-marker

Answer 1

Waitting for answers