inspector window 的 html 中的 ::marker 是什么意思?

What does ::marker in html of inspector window mean?

我在调试控制台看到有如下元素

<li>
    ::marker
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</li>

这个::marker是什么意思?

The ::marker CSS pseudo-element selects the marker box of a list item, which typically contains a bullet or number. It works on any element or pseudo-element set to display: list-item, such as the <li> and <summary> elements.

https://developer.mozilla.org/en-US/docs/Web/CSS/::marker