minor #16815 [Frontend] Add a note about stimulusFetch & TypeScript config (jmsche)

This PR was merged into the 5.4 branch.

Discussion
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[Frontend] Add a note about stimulusFetch & TypeScript config

Just a note about using `stimulusFetch` in Stimulus controllers while writing them with TypeScript.

Commits
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64c9936 [Frontend] Add a note about stimulusFetch & TypeScript config

Author: javiereguiluz

frontend/encore/simple-example.rst

@@ -317,6 +317,11 @@ split to *separate* files by Encore. Then, those files won't be downloaded until
 the moment a matching element (e.g. ``<div data-controller="lazy-example">``)
 appears on the page!
 
+.. note::
+
+    If you write your controllers using TypeScript, make sure
+    ``removeComments`` is not set to ``true`` in your TypeScript config.
+
 .. _multiple-javascript-entries:
 
 Multiple Entries

frontend/ux.rst

@@ -131,6 +131,11 @@ To make one of your custom controllers lazy, add a special comment on top:
 To make a third-party controller lazy, in ``assets/controllers.json``, set
 ``fetch`` to ``lazy``.
 
+.. note::
+
+    If you write your controllers using TypeScript, make sure
+    ``removeComments`` is not set to ``true`` in your TypeScript config.
+
 More Advanced Setup
 -------------------