exportparts

exportparts attribute

The exportparts attribute in HTML is part of the Web Components specification, enabling the creation of reusable custom elements. It is used within a shadow DOM to expose specific shadow DOM parts to the light DOM, allowing external styling and manipulation of those parts.

Syntax

The general syntax for the exportparts attribute is:

<custom-element exportparts="shadowPartName1: exportedName1; shadowPartName2: exportedName2; ...">
</custom-element>

• shadowPartName: The name of the part inside the shadow DOM that you want to expose.
• exportedName: The new name you assign to the exposed part, which will be used in the light DOM.

Example

<!-- Custom element with exportparts attribute -->
<my-element exportparts="header: custom-header; body: custom-body"></my-element>

The exportparts attribute in HTML allows certain sections of a shadow DOM component to be exposed to the light DOM, enabling external styling and manipulation. This feature offers selective encapsulation, making components more customizable and reusable while maintaining their internal structure.

Conclusion

The exportparts attribute enables selective exposure of shadow DOM parts to the light DOM for external styling and manipulation. It enhances the reusability and customization of custom elements while maintaining encapsulation. This feature requires modern browsers with Shadow DOM support.