lwc

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### Description I'm working on creating a LWC with our 3D building viewer. The 3D engine uses `Float32Array` to build GPU buffers. When using Lightning Web Security, it is very...

Amoki

Deferrable Views

1

**Is your feature request related to a problem? Please describe.** obs: this feature is not the same as react|vue's suspense api. I see it as an improved version. What if...

AllanOricil

[Metadata] Inconsistency in AST for deep vs shallow expressions

3

Compare these two templates: ```html ``` ```html ``` The only difference is `onclick={foo}` vs `onclick={foo.bar}`. (I've also added `data-dynamic={dynamic}` to avoid the static content optimization.) The output JS is very...

nolanlawson

Forwarded synthetic shadow slots throws error when slot attribute is an expression

1

### Description Using an expression for a `slot` attribute in synthetic shadow throws an error. "DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is not a...

jmsjtu

Support closed shadow mode in `CustomElementConstructor`

1

Currently, when using `CustomElementConstructor`, the mode is hard-coded to `open`: https://github.com/salesforce/lwc/blob/6e75634e16a21c500d5e3f45400d1db3da3f5346/packages/%40lwc/engine-dom/src/apis/build-custom-element-constructor.ts#L100 Whereas when using `lwc.createElement`, you have the option of choosing closed or open: https://github.com/salesforce/lwc/blob/6e75634e16a21c500d5e3f45400d1db3da3f5346/packages/%40lwc/engine-dom/src/apis/create-element.ts#L85-L90 This mode then cascades down...

nolanlawson

[ci] Use NX caching to speed up CI

11

We could be using the NX cache in CI (Nucleus, GitHub Actions) so speed up tests. In the past, though, we've run into issues with the NX cache becoming out-of-date...

nolanlawson

Add Context or Provide/Inject API to solve the Props Drilling problem

5

**Is your feature request related to a problem? Please describe.** I could not find a similar feature in lwc to solve the Props Drilling problem **Describe the solution you'd like**...

AllanOricil

Add diagnostics to detect unnecessary re-renders

2

It's possible to write an LWC component that over-renders unnecessarily. Example: ```js export default class App extends LightningElement { @track data = { foo: 'foo'} connectedCallback() { setInterval(() => {...

nolanlawson

Rendering list items without a key is possible using text/comment nodes

1

In principle, component authors are not supposed to be able to render lists without keys. However, it turns out that it's possible using [text nodes](https://stackblitz.com/edit/salesforce-lwc-wakvc9?file=src%2Fmodules%2Fx%2Fapp%2Fapp.html,src%2Fmodules%2Fx%2Fapp%2Fapp.js,package.json&title=LWC%20playground) or [comment nodes](https://stackblitz.com/edit/salesforce-lwc-y5zvvd?file=src%2Fmodules%2Fx%2Fapp%2Fapp.html,src%2Fmodules%2Fx%2Fapp%2Fapp.js,package.json&title=LWC%20playground): ```js export...

nolanlawson

**Is your feature request related to a problem? Please describe.** When catching error in lwc `errorCallback()`, the `error.stack` is quite unusable with the production build of LWC, and slightly better...

gaelguimini