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CustomStateSet: size property - Web APIs

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1. Web
2. Web APIs
3. CustomStateSet
4. size

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• Value
• Specifications
• Browser compatibility

1. Web Components
2. CustomStateSet
3. Instance properties
   1. size
4. Instance methods
   1. add()
   2. clear()
   3. delete()
   4. entries()
   5. forEach()
   6. has()
   7. keys()
   8. values()
5. Related pages for Web Components
   1. CustomElementRegistry
   2. Document.createElement()
   3. Element.attachShadow()
   4. Element.shadowRoot
   5. Element.slot
   6. ElementInternals
   7. Event.composed
   8. Event.composedPath
   9. HTMLElement.attachInternals()
   10. HTMLSlotElement
   11. HTMLTemplateElement
   12. Node.getRootNode()
   13. Node.isConnected
   14. ShadowRoot
   15. Window.customElements

• Value
• Specifications
• Browser compatibility

Baseline 2024

Newly available

Since May 2024, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

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The size property of the CustomStateSet interface returns the number of values in the CustomStateSet.

An integer indicating how many properties the CustomStateSet has.

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This page was last modified on Mar 26, 2024 by MDN contributors.

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