Valve has finally added Nintendo Switch Joy-Con support to Steam through its Client Beta program.
As reported by PCGamer, the Steam Client Beta was re-released and updated on August 5, allowing for official support of Nintendo Switch Joy-Con controllers. They can be used individually as a mini-gamepad or combined into pairs.

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How To Mod Your Nintendo Switch and Joy-Con

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The update also provided improved support for the Nintendo Online Classic controllers.

In order to use this function, users will need to go into the Steam Client Beta and at the top left corner, click "Steam," then "Settings." After that, go into the "Account" tab and in the "Beta Participation" section, click "Change."

Click the dropdown menu and select "Steam Beta Update." After that, restart Steam and you should be good to go.

Steam supports a wide variety of controllers, both wired and wireless. Unfortunately, there's no way to wire your Joy-Cons to your PC set up so you'll have to use bluetooth. In addition to Joy-Con support slowly rolling out on Steam, in June we learned from an iOS developer that the next major iPhone update will also include support for Joy-Con controllers.

While Nintendo insists that Joy-Con durability and manufacturing have improved since the Switch's launch in 2017, some repair centers reportedly felt overwhelmed due to the sheer volume being sent in for fixing.

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