'Minimal JavaScript required to use Shadow DOM polyfilled CSS encapsulation

I'm trying to figure out the minimum set of parts of the web components polyfill at https://github.com/webcomponents/webcomponentsjs I need to take advantage of the CSS encapsulation offered by the ShadowDOM polyfill. Do I need the full polyfill?



Solution 1:[1]

If you just want to polyfill Shadow DOM, you can use ShadyDOM.

To polyfill Shadow DOM CSS, you should use also ShadyCSS.

Solution 2:[2]

You can use Vanilla JS to work with Shadow DOM

https://developer.mozilla.org/en-US/docs/Web/Web_Components/Using_shadow_DOM

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Supersharp
Solution 2 Domenico Monaco