How to switch language server on the fly?

[TxHawks]

Is there a way to switch the language server that is being used on the fly?

When editing javascript files, I find myself mostly wanting to use javascript-typescript-stdio, but switch to flow-language-server in projects where I use Flow.

Is that possible? Couldn't find anything relevant in the documentation or issues other than a reference to LanguageClient_registerServerCommands in #136 (comment), but not sure how to use it, or if it is even the right solution.

[autozimu]

You can put settings like this in a local vimrc file

call LanguageClient_registerServerCommands({'javascript':['path-to-server']})

And use a plugin to load load vimrc file.

Obviously you can do this manually without a plugin, just run the command before executing :LanguageClientStart.

[TxHawks]

@autozimu
I get Ambiguous use of user-defined command when trying to run
:call LanguageClient_registerServerCommands({'javascript':['path-to-server']})

and indeed, :commands lists only LanguageClientStop and LanguageClientStart

[autozimu]

LanguageClient_registerServerCommands is a function, not a command.

Not sure what happened on your side, but I tried the steps and see no errors. If you believe you found an issue, please create new bug report. Cannot help much without detail information.