explicit_js_mode

(explicit_js_mode ...)

Do not implicitly add js to the (modes ...) field of executables.

In projects that use dune lang 1.x, JavaScript targets are defined for every bytecode executable. This is not very precise and does not interact well with the @all alias.

It is possible to opt out of this behavior by using:

(explicit_js_mode)

When this is enabled, an explicit js mode needs to be added to the (modes ...) field of executables in order to trigger the JavaScript compilation. Explicit JS targets declared like this will be attached to the @all alias.

Starting with Dune 2.0, this behavior is the default, and there is no way to disable it.