Magento 2.1 - How can I remove the ability for a user to UNSELECT a swatch image?

Magento 2.1 - How can I remove the ability for a user to UNSELECT a swatch image?

I have all configurable products, I have created default simple product configurations for all configurable products. In the configurable product I have a double swatch configuration and if the user accidentally clicks twice on a swatch image, that option becomes UNSELECTED. I need to remove the ability for the user to UNSELECT any swatch, the configurable product must always have a swatch selected. The user can choose different configurations, and move about, but should never be allowed to select nothing.

I have configured default configurations on all configurable products and I want the swatches to behave like radio buttons in that the user always has 1 of each selected. We have a total of 2 possible swatches. FRAME color and LENS color; one of each must always be selected.
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sqlagent007Author Commented:
I forgot to add the version...We are using CE.

Wrangler jeans does a good job of this and I know they are EE, but I have to believe there is a way to do this in CE.

Notice on this page you can never UNSELECT a jean COLOR

I think you have to play around with JS to have default selection on PDP page load.

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sqlagent007Author Commented:
Thanks, that is what we ended up with.
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