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Add TypeScript support to LWC authoring format

5

**Is your feature request related to a problem? Please describe.** No **Describe the solution you'd like** Add typescript support **Describe alternatives you've considered** NA **Additional context** The industry of frontend...

AllanOricil

### Description #### Steps to Reproduce Currently, the LWC engine unmounts all the shadow elements in reverse order and the slotted elements in reserve order when synthetic shadow DOM is...

pmdartus

Enable inline css AND dynamic css in the same element

4

**Is your feature request related to a problem? Please describe.** At the moment I can't do this ````html ```` I have to do something like ````html ```` ````js controllerVariable =...

AllanOricil

OSS compiler throws when accessing non public API from the engine

4

### Description In order to test the `@lwc/engine` test files need access to some of the `@lwc/engine` protected APIs like `isNodeFromTemplate`. However, the OSS compiler throws when accessing those APIs....

pmdartus

[@lwc/engine-core] Exception thrown during dom cleanup routine in boundary protection

1

### Description When a component has provided an `errorCallback`, the `runWithBoundaryProtection` routine cleans up DOM elements in the shadow tree before invoking the `errorCallback`. In situations when exceptions occur *before*...

ravijayaramappa

Transition / Animation system

10

**Is your feature request related to a problem? Please describe.** I did not find any documentation about a transition / animation system (CSS or JS). **Describe the solution you'd like**...

lbineau

There are a few different categories of parse5 errors: - Errors - Warnings that will turn into errors in a future LWC release - Unexpected errors thrown by parse5 Currently...

nolanlawson

Synthetic shadow polyfill pollutes the global namespace

3

### Description Loading the `@lwc/synthetic-shadow` polyfill pollutes the global namespace, resulting in errors in several web platform tests. #### Steps to Reproduce ```bash git clone https://github.com/divmain/wpt.git cd wpt git checkout...

divmain

Datatable Column action check mark not updating when using Header-Level Actions and @track

10

Apologies if this is not correct repo but not sure where to post issues about BaseComponents... I followed documentation for "Creating Header-Level Actions" (https://developer.salesforce.com/docs/component-library/bundle/lightning-datatable/documentation) The actions fire ok but the...

magnadrew

feat: add support for `config` in `lwc:dynamic`

2

## Details `lwc:dynamic` after this change accepts an object `{props: Record, constructor: LightningElementConstructor}`. We're doing only props for now, since the ask is only for props. We'll enable attrs, event...

abdulsattar