Russell Bicknell

### Description When both the `multi` and `fallback-selection` attributes are set on an `` in HTML, the first property flush throws [in `IronMultiSelectableBehavior`](https://github.com/PolymerElements/iron-selector/blob/e945bd9b7d7c7e03f57fa647360c0a4ceccca330/iron-multi-selectable.js#L122). When these two attributes are used together,...

The radio button shapes are distorted at different zoom levels by all browsers due to box-to-device-pixel alignment intended to prevent border anti-aliasing. This causes the outer circle and inner dot...

`Element`'s `toggleAttribute` should have an `-NS` counterpart.

2

`toggleAttribute` seems to be the only attribute-modifying method of `Element` that doesn't have an `-NS` counterpart - maybe it should be added for completeness? I have [a branch with spec...

Component members are discovered within the context of some declaration associated with a single AST node. If that declaration has free type parameters, then asking the type checker for that...

The `ifDefined` directive should return a non-null type, not just non-`undefined`.

1

The return type of `ifDefined` is determined with a special rule here: https://github.com/runem/lit-analyzer/blob/92c084da4d33d6fbdd8b29603d2003387e65dbb3/packages/lit-analyzer/src/lib/rules/util/directive/get-directive.ts#L45-L63 But the analyzer doesn't realize that the return type can't be `null` in Lit 2, because it...

This prevents the user-provided form content in the demos from being interpreted as HTML.

Available only in a secure context?

2

> Because this API relates to the ability to do work in the background, which is considered a privilege, functionality provided by this API is only available in a secure...