Re-evaluate requirement for tslib as a dependency

[oliviertassinari]

This is a follow-up on a conversation we have started in #44 (comment). The tslib dependency was added in order to make codesandbox runs successfully. It's unclear if the requirement is coming from codesandbox itself or from a misconfiguration of the building pipeline.

It's also to be noted that we use babel-runtime on @material-ui/core which might duplicate in the bundle for our users.

@dmtrKovalenko Considering we have a similar building stack on the pickers, do you have any idea of what could be wrong? :)

I have added the "Post MVP" milestone as we can/should delay the resolution to later.

[dmtrKovalenko]

Yes, in pickers we followed up on the usage of Babel for pickers compilation. I am not sure about building process in material-ui-x, but we are using rollup + Babel plugin which works just perfectly.

Tslib is actually Babel runtime helpers, but for native ts compiler.

I could contribute on making pretty same build process.

[oliviertassinari]

I'm linking mui/material-ui#18447 from @eps1lon to the discussion, I think that it happens to be in the same space.

[eps1lon]

The grid is currently only compiled with tsc? How are different targets handled with tsc nowadays?

Otherwise I don't understand what the issue is. tslib is to tsc --importHelpers what @babel/runtime is to @babel/plugin-transform-runtime, no?

[oliviertassinari]

Otherwise I don't understand what the issue is. tslib is to tsc --importHelpers what @babel/runtime is to @babel/plugin-transform-runtime, no?

@eps1lon From what I understand, including babel/runtime and tslib in the bundle, leads to a duplication of the same helpers in the bundle. Does it increase the bundle size to a point we should care?

[eps1lon]

Does it increase the bundle size to a point we should care?

You opened the issue. I would've expected that you identified an issue.

If you need to transpile with babel and tsc (never encountered that use case. babel is usually enough) I'd be surprised if they would add the same helpers. In the end transpilation happens in a pipeline so if you transpile a piece of code with tsc babel wouldn't see it and transpile it again.

I never used tslib or tsc+babel so I can't help much without a full issue description.

[oliviertassinari]

@eps1lon Thanks, I think that it will be interesting to follow what happens with mui/material-ui#18447, ideally, expose the same options here.