Steve Orvell

Add support for ShadyDOM on-demand patching

1

Do not merge until on https://github.com/webcomponents/polyfills/pull/189.

[labs/test-projects] Adds additional test elements

2

Adds additional test elements for validating framework wrappers.

Adds `@lit-labs/parts` package

2

A set of tools for facilitating theming using [css shadow parts](https://www.w3.org/TR/css-shadow-parts-1/). See [README](https://github.com/lit/lit/tree/css-parts/packages/labs/parts#overview) for more info.

[ReactiveElement] exposes `changedProperties`

2

Fixes #2721.

[reactive-element] Adds `decorators` to `static properties`

1

Fixes https://github.com/lit/lit/issues/1924 * Adds ability to specify decorators in `static properties` by adding a `decorators` array with decorator function calls. Use `reactive: false` if the property should not be reactive,...

[labs/analyzer] Improve event typing

2

To better type event handler functions, we'll want to add some way to configure typing for an event's payload. See https://github.com/lit/lit/pull/2880#discussion_r884024730.

[reactive-element] Resolve issues with setting default values for reflecting properties

5

## Description It's currently tricky to match native DOM behavior when setting a default value for a reflecting property. For example, the `input` element's `type` property defaults to `text` but...

[reactive-element] Adds `preserveExisting` option to `adoptStyles`

2

Fixes #3010. Adds ability to add to an existing set of styles via `adoptStyles`.

### Which package(s) are affected? Observers (@lit-labs/observers) ### Description ResizeController accepts a target element to observe. It observes the given target when the host is connected and/or when the controller...

[reactive-element] Adds decorators for `@compute`, `@observe`, and `@listen`

8

Fixes https://github.com/lit/lit/issues/1873. * Adds `@computed` decorator for creating computed properties. Decorator specifies an array of deps which are the names of dependent properties and a compute function which is called...