Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

The ::slotted() CSS pseudo-element represents any element that has been placed into a slot inside an HTML template (see Using templates and slots for more information).

This only works when used inside CSS placed within a shadow DOM. Note that this selector won't select a text node placed into a slot; it only targets actual elements.

Try it

/* Selects any element placed inside a slot */
::slotted(*) {
  font-weight: bold;

/* Selects any <span> placed inside a slot */
::slotted(span) {
  font-weight: bold;


::slotted(<compound-selector>) {
  /* ... */


Highlighting slotted elements

In this example, we use a template with three slots:

<template id="person-template">
    <h2>Personal ID Card</h2>
    <slot name="person-name">NAME MISSING</slot>
      <li><slot name="person-age">AGE MISSING</slot></li>
      <li><slot name="person-occupation">OCCUPATION MISSING</slot></li>

We define the <person-details> custom element. In this case, we add styles with JavaScript, though we could have added them in a <style> block within the <template> with the same effect:

  class extends HTMLElement {
    constructor() {
      let template = document.getElementById("person-template");
      let templateContent = template.content;

      const shadowRoot = this.attachShadow({ mode: "open" });

      let style = document.createElement("style");
      style.textContent =
        "div { padding: 10px; border: 1px solid gray; width: 200px; margin: 10px; }" +
        "h2 { margin: 0 0 10px; }" +
        "ul { margin: 0; }" +
        "p { margin: 10px 0; }" +
        "::slotted(*) { color: gray; font-family: sans-serif; } " +
        "::slotted(span) {text-decoration: underline;} ";


When filling the style element with content, you'll see that we select all slotted elements (::slotted(*)) and give them a different font and color. This differentiates them from the slots that haven't been filled. We styled all the slotted <span>s (::slotted(span)) to differentiate the <span>s from the <p>s.

Our markup includes three custom elements, including a custom element with an invalid slot name in a source order that differs from the <template>:

  <p slot="person-name">Wonder Woman</p>
  <span slot="person-age">Immortal</span>
  <span slot="person-occupation">Superhero</span>

  <p slot="person-name">Malala Yousafzai</p>
  <span slot="person-age">17</span>
  <span slot="person-occupation">Activist</span>

  <span slot="person-age">44</span>
  <span slot="not-a-slot-name">Time traveller</span>
  <p slot="person-name">Dr. Who</p>



CSS Scoping Module Level 1
# slotted-pseudo

Browser compatibility

BCD tables only load in the browser

See also