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Rob Levin

Post Thumbnail for Constructable Stylesheets and adoptedStyleSheets: One Parse, Every Shadow Root
Constuctable StylesheetsCSSLitShadow DOMWeb Components

Constructable Stylesheets and adoptedStyleSheets: One Parse, Every Shadow Root

By Rob Levin on Apr 23, 2026

If you have any shared styles across multiple shadow DOMs (imagine 20 custom button components), a Constructable Stylesheets is just way more efficient.

Post Thumbnail for Shadow DOM Focus Delegation: Getting delegatesFocus Right
AccessibilityFocusJavaScriptShadow DOMWeb Components

Shadow DOM Focus Delegation: Getting delegatesFocus Right

By Rob Levin on Mar 24, 2026

You don’t necessarily have to do focus handling yourself with shadow DOM web components. For simple wrapper components, there is an easier (and better) way.

Post Thumbnail for Form-Associated Custom Elements in Practice
AgnosticUIattachInternalsFormsWeb Components

Form-Associated Custom Elements in Practice

By Rob Levin on Mar 11, 2026

When you make a Web Component for a form element, you’ve got a bit of extra work to do to make sure they participate on the form in expected ways.

Post Thumbnail for Post Mortem: Rewriting AgnosticUI with Lit Web Components
JavaScriptLitPatternsWeb Components

Post Mortem: Rewriting AgnosticUI with Lit Web Components

By Rob Levin on Mar 03, 2026

A framework-agnostic component library, designed to be styled. It can be done.

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Rob Levin
Rob Levin
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