Element: slot property
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 slot property of the Element interface
returns the name of the shadow DOM slot the element is inserted in.
A slot is a placeholder inside a web component that users can fill with their own markup (see Using templates and slots for more information).
Value
A string.
Examples
In our simple-template example (see it live), we create a trivial custom element example called
<my-paragraph> in which a shadow root is attached and then populated
using the contents of a template that contains a slot named my-text.
When <my-paragraph> is used in the document, the slot is populated
by a slottable element by including it inside the element with a
slot attribute
with the value my-text. Here is one such example:
<my-paragraph>
<span slot="my-text">Let's have some different text!</span>
</my-paragraph>
In our JavaScript file we get a reference to the <span> shown above,
then log a reference to the name of the corresponding <slot> element.
let slottedSpan = document.querySelector("my-paragraph span");
console.log(slottedSpan.slot); // logs 'my-text'
Specifications
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| DOM # ref-for-dom-element-slot① |
Browser compatibility
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support