Add an example how to adjust ts-loader settings

[Steveb-p]

https://symfony.com/doc/current/frontend/encore/typescript.html - show how to set up custom ts-loader options. Sample comes from index.js.

https://github.com/symfony/webpack-encore/blob/f5a17a47b5fcd23ff991bd7154385185c7f54e2f/index.js#L956-L979

[javiereguiluz]

@Lyrkan could you please review this proposed change? Thanks!

[Lyrkan]

Looks good to me.

Only (really) minor concern: I wonder if it would also be clear for newcomers that the whole callback thing is optional and they can just call .enableTypeScriptLoader() without any parameter.

In Encore's index.js' comments we usually show both versions to avoid any ambiguity... but maybe I'm worrying about nothing :)

[Steveb-p]

@Lyrkan current page already has an example just above the one that this PR adds, where there is no parameter. I had considered it sufficient, as it is a continuation of the example.

I'll adjust it into a diff instead to clearly show that it's an optional parameter that is only required if a specific ts-loader adjustment is needed.

EDIT: ccb694d should do the trick.

[Lyrkan]

@Lyrkan current page already has an example just above the one that this PR adds, where there is no parameter. I had considered it sufficient, as it is a continuation of the example.

Oh, my bad then, I didn't expand the top part of the file :)

I'll adjust it into a diff instead to clearly show that it's an optional parameter that is only required if a specific ts-loader adjustment is needed.

Good idea!

[javiereguiluz]

Paweł, thanks for improving these docs. We merged this in 3.4 branch. Thanks.